The Longhorn may be dead...this sucks. - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

68C15 · 03-07-2005, 11:48 PM

I just have to be the party pooper on this one.
maybe that is why the engine was just laying on the floor & no one wanted it.
OK, that being said, I have the highest hopes for ya. SOMETHING good has to happen sooner or later

*dtlilly* · 03-07-2005, 11:50 PM

Quote:

Originally Posted by Longhorn Man

... When I explained what happend she laughed and said sorry.

Something tells me you left out the part of going 80 on the Interstate

Longhorn Man · 03-07-2005, 11:54 PM

The engien was being stored as a spare. I know the guy i bought it off of and trust him 100% He told me no knock no smoke...and that's what it was. I already racked up something like 70 or 80 miles on it yesterday, so this is a new problem, not something that was there when i bought it.

Don, would you bieleve me if i told you that I DID mention it?

68C15 · 03-07-2005, 11:57 PM

OK, I'm sorry. I didnt know it was a spare.
then maybe a Caddy motor just has a problem residing in one of our trucks. should I stop my plans?

Longhorn Man · 03-07-2005, 11:59 PM

LOL...well, 67-72king has a caddy in his longhorn, and he lost the oil pump goin down the road. He replaced the pump and all seemed good, but a couple days later it started knocking again.
Maybe it is just a longhorn thing.

stllookn · 03-08-2005, 12:06 AM

Andy, I have lost oil pressure and not had any problems with the motor. It sounds like you got it shut down soon enough. As long as the loss of pressure was not due to excessive bearing clearance you should be fine. I am sure you would have heard plenty of knocking it is was. You should pull the dizzy and try to pressurize it with the dizzy oil pump drive. Then you will know if the bearings are too worn to hold pressure.

69 longhorn · 03-08-2005, 12:16 AM

Quote:

Originally Posted by Longhorn Man

LOL...well, 67-72king has a caddy in his longhorn, and he lost the oil pump goin down the road. He replaced the pump and all seemed good, but a couple days later it started knocking again.
Maybe it is just a longhorn thing.

Nah, I ran a Caddy in my longhorn for a while, & it didnt give too many problems......other than spittin out a couple valve springs around 5500

best of luck there Andy......

L

86SILVERADO · 03-08-2005, 12:32 AM

Good luck with it Andy. Just swap in the oil pump and fire it up it will either be a runner or you will know other wise pretty quick. I smoked a 305 one time and it ran O.K for a while but burned alot of oil. The bores got glazed from the heat. You will know it if it overheated real bad when you tear down the motor you will see alot of bluing on cylinder walls and bearings.

dion · 03-08-2005, 01:32 AM

Sorry to hear Andy, I really hope things work out for you.

lux hauler · 03-08-2005, 01:39 AM

Andy,
Sorry to hear about this.
Make sure you get the correct pump to block gasket. Anything a little thinner or thicker will affect the oil pressure. The gasket that is made for is is all that will work correctly.
Here's a thread about the gasket...
http://www.cowboyseven.us/forum/index.php?topic=308.0

Gary · 03-08-2005, 01:51 AM

Quote:

Originally Posted by Longhorn Man

yeah TJ, I was in a hurry. That should be around 80 or so...I was still getting passed up left and right...literally.

Sorry about your crappy run, hey maybe this is just the excuse you need to order that 502 crate motor!

I get those summit catalogs and see those $7495 complete 502's they run in there and just sit on the throne drooling over how good that'd sound in my truck. Then I remember that other than a little oil leak, my 402 runs like a freaking top and sounds damn good too.

Your comment about 4Krpm just reminds me how different one truck can be from the next, mine with the 4 speed 700r4 and 3.08 gears won't never see 4K rpm on the interstate, at least, not in 4th gear (YOWZA) according to one of those calculators, 700r4 + 26.6 inch tire + 3.08 gears + .04 slip (??) = 141 mph, no way, in hell, is that happening, ever, heck even in 3rd that chart shows 99mph at 4000 rpm (ok that might happen but not very damn often!).

69 Short Fleet · 03-08-2005, 06:54 AM

Yes, sure hope this won't be anything major for you Andy.... would like to hear its back on the road soon (instead of driving "plan B").

**CPNE** · 03-08-2005, 10:46 AM

Quote:

Originally Posted by 68 Stepside

4k on the interstate? GD man....... No other comments...good luck

I'll add one.

Maybe I'm the

one here but isn't that a lot of constant RPMS on a heavy reciprocating mass? If it were mine and my only mode of transportation, plus fresh off several years of sitting, I'd had babied it some.

I wish you only the best and hope its nothing major, but for God's sake man, treat her like the old lady she is.

busterwivell · 03-08-2005, 03:22 PM

Man, that sucks! I remember buzzin' down the freeway When my old 402 decided it was time to retire. By the time I saw the smoke, it was too late, but it wasn't an oil pump. Good luck!

RON WOODGEARD · 03-08-2005, 03:33 PM

Quote:

Originally Posted by Longhorn Man

no water in the oil, that is certian.

In all reality, i wouldn't know what to look for on the bearing anyways...onless it is painfully obviouse.
Since the oil pump is external, I'm just going to remove,rebuild, and install it and see if the engine made it through OK.
i wouldn't have time to pull the engine untill next sautrday anywasy.

Andy,
A bad bearing does stand out like a sore thumb !! It will either be worn/burned through to showing Copper, or just be Flattened and possibly Spun. If it's spun the bottom half and the upper half will be overlapping instead of Butting up to each other.. I've pulled them to where the bearing is actually over lapping the side of the rod cap.. ( Not a good thing) That was an engine I was pulling 9 Grand out of, and the oil pump shaft busted

**Daubs** · 03-08-2005, 03:36 PM

Good luck...

mooneyes · 03-08-2005, 05:52 PM

...check your pm box andy...sent ya some info

beautimus · 03-08-2005, 08:38 PM

Andy,
put that oil pump on and try it. your due for some good luck.
remember, the law of averages says that you can't have bad luck all the time.

good luck man, Tony

modifiedGMC · 03-08-2005, 10:20 PM

After reading this thread I'm glad the 425 with 400 tranny I bought is still resting in the 79 fleetwood out back! I started to put it in my GMC but when I got the 425 fired up it didn't sound too healthy so I went with a 350 4 bolt chevy. If you need any parts (hopefully not) give me a holler.

Longhorn Man · 03-08-2005, 11:06 PM

update...I got 40PSI when i fired it up today.

http://67-72chevytrucks.com/vboard/s....php3?t=144838

Lets see....questions and comments here...
Lux..thanks, i knew that at one timne, but had completely slipped my mind. Now, if I were to mill my oil pump body...that would increase my oil pressure...would there be any reason NOT to do this?

CPNE, you make a good point, however, I had just spun her up to 4000...I hadn't been holding it. I was trying to get in front of an old POS station wagon that was spewing oil and smoke from it's tail pipe. Kinda ironic in hindesight huh? And it wasn't my only mode of transportation...I'm hoildin onto the town car for this exact reason. Once the truck proves reliable, then I'll get rid of it. From what I understand, 4 k isn't all that hard on it...but 5k is askin for trouble. While yes, it was dormant for a long time...I have run it about 5 hrs all together over the last couple months, bringing it up to full operating temp, gone through about 5 or 6 oil chainges to flush out some contaminants (like fuel in the oil with the electric pump blowin it by the needles on the edelbrock) Then, on Sunday i drove her all over town all day. A couple short sprints on the freeway, but mostly just bumpin around on the surface streets. I looked at the odometer before leavin the shop today, and I drove it about 70 or so miles on sunday.
So even though it had been dormant, I had run it a bit and it should've been good to go.

68C15 · 03-08-2005, 11:33 PM

does it still run smooth? I have heard of engines sitting for a while wiping out the lobes after being brought back to life. one guy at work found this out the hard way with his HIGH dollar BB (over $8000)

Longhorn Man · 03-09-2005, 12:41 AM

yep, ran smoothe, strong as an ox....made me want to drive it home...but it isn't leavin the lot untill i rebuild the oil pump and cut the oil fiolter open.
oh yeah, and drain the oil again too.

lux hauler · 03-09-2005, 01:48 AM

Quote:

Originally Posted by Longhorn Man

update...I got 40PSI when i fired it up today.

http://67-72chevytrucks.com/vboard/s....php3?t=144838

Lets see....questions and comments here...
Lux..thanks, i knew that at one timne, but had completely slipped my mind. Now, if I were to mill my oil pump body...that would increase my oil pressure...would there be any reason NOT to do this?

I've heard that the gasket thickness MUST be between .005 and .007.....no more, no less. I would assume that if there isn't enough distance, the gears will rub the block surface......no oil pressure. Too much distance and the oil goes around the gears instead of being forced through the oiling system......no oil pressure.
It'd be best to leave it as is. I know guys that are running really stout 500+ inch Caddys with stock oil pumps. I don't really see any reason to try to get more on a stock engine.

**VetteVet** · 03-09-2005, 02:11 AM

Here Is a picture I found of an exploded view of an oil pump. I see yours is external. I'm not too familiar with caddys but this pic shows the pump IPB and the relief valve that you've been discussing . This is an AMC unit BTW.
VetteVet--hope shes ok

03-07-2005, 11:48 PM	#26
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	I just have to be the party pooper on this one. maybe that is why the engine was just laying on the floor & no one wanted it. OK, that being said, I have the highest hopes for ya. SOMETHING good has to happen sooner or later __________________ Man rule #77...if you own a 67 stepside with a caddy 472 you will never be in danger of loosing you man card

03-07-2005, 11:57 PM	#29
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	OK, I'm sorry. I didnt know it was a spare. then maybe a Caddy motor just has a problem residing in one of our trucks. should I stop my plans? __________________ Man rule #77...if you own a 67 stepside with a caddy 472 you will never be in danger of loosing you man card

03-08-2005, 12:06 AM	#31
stllookn Saving 1 truck at a time! Join Date: Aug 2001 Location: Kent, WA Posts: 6,465	Andy, I have lost oil pressure and not had any problems with the motor. It sounds like you got it shut down soon enough. As long as the loss of pressure was not due to excessive bearing clearance you should be fine. I am sure you would have heard plenty of knocking it is was. You should pull the dizzy and try to pressurize it with the dizzy oil pump drive. Then you will know if the bearings are too worn to hold pressure. __________________ '68 C20 Longhorn 50th Anniversary 400/TH400 '68 C20 Longhorn 50th Anniversary 468/TH400w/buckets '72 C20 Halfhorn (Longhorn w/o cab and front clip) '69 Flxible Cruiser (look up ugly in the dictionary)

03-08-2005, 12:32 AM	#33
86SILVERADO Registered User Join Date: Dec 2002 Location: Hills of Western Mass Posts: 626	Good luck with it Andy. Just swap in the oil pump and fire it up it will either be a runner or you will know other wise pretty quick. I smoked a 305 one time and it ran O.K for a while but burned alot of oil. The bores got glazed from the heat. You will know it if it overheated real bad when you tear down the motor you will see alot of bluing on cylinder walls and bearings. __________________ 86 Silverado C10 back to 305 power! 67 C30 Dually Dump, with 350 transplant, Rockhauler 05 Duramax 3500 "If at first you don't succeed, try a bigger hammer" Member of the 1-Ton club!

03-08-2005, 01:32 AM	#34
dion 72 Cheyenne Join Date: Oct 2001 Location: San Diego Posts: 2,086	Sorry to hear Andy, I really hope things work out for you. __________________ Burnout Idle 1972Cheyenne 1966/67Stouts

03-07-2005, 11:54 PM	#28
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	The engien was being stored as a spare. I know the guy i bought it off of and trust him 100% He told me no knock no smoke...and that's what it was. I already racked up something like 70 or 80 miles on it yesterday, so this is a new problem, not something that was there when i bought it. Don, would you bieleve me if i told you that I DID mention it?

03-07-2005, 11:59 PM	#30
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	LOL...well, 67-72king has a caddy in his longhorn, and he lost the oil pump goin down the road. He replaced the pump and all seemed good, but a couple days later it started knocking again. Maybe it is just a longhorn thing.

03-08-2005, 01:39 AM	#35
lux hauler Psycho-billy Member Join Date: Jul 2001 Location: about 40 miles west of Cleveland, Ohio Posts: 2,591	Andy, Sorry to hear about this. Make sure you get the correct pump to block gasket. Anything a little thinner or thicker will affect the oil pressure. The gasket that is made for is is all that will work correctly. Here's a thread about the gasket... http://www.cowboyseven.us/forum/index.php?topic=308.0 __________________ '72 C-10 350 w/Lunati Voodoo cam (207/213, .437/.454), Performer intake, 625 Road Demon Jr. and Hooker headers. Support your community, support yourself. Buy local, buy American (or Canadian).

03-08-2005, 06:54 AM	#37
69 Short Fleet Registered User Join Date: Nov 2002 Location: Kelowna B.C. Canada Posts: 1,086	Yes, sure hope this won't be anything major for you Andy.... would like to hear its back on the road soon (instead of driving "plan B").

03-08-2005, 03:22 PM	#39
busterwivell Registered User Join Date: Jan 2002 Location: Sahuarita, AZ USA Posts: 2,033	Man, that sucks! I remember buzzin' down the freeway When my old 402 decided it was time to retire. By the time I saw the smoke, it was too late, but it wasn't an oil pump. Good luck! __________________ Bill - Tucson, AZ 47 Chevrolet 2 dr sedan 56 Chevrolet 210 2 dr sedan 66 Chevrolet Malibu 2 dr 4 speed 71 Chevrolet C30 Longhorn 86 Chevrolet Monte Carlo SS (Sold) 01 Chevrolet Tahoe IM - BUSTERWIVE@aol.com

03-08-2005, 03:36 PM	#41
Daubs Registered User Join Date: Jan 2005 Location: Eastern Nebraska Posts: 611	Good luck... __________________ '72 Chevy K-20 Crate 350, SM465, 4.10's

03-08-2005, 05:52 PM	#42
mooneyes Registered User Join Date: Jan 2002 Location: Slippery Rock PA USA Posts: 1,692	...check your pm box andy...sent ya some info __________________ Ken Lyons, Slippery rock pa 68 short step 327 t10 4 gear 72 2wd blazer project 70 lwb 305/700r driver 78 caprice project 02 cavalier D.D ( hate it!!)

03-08-2005, 08:38 PM	#43
beautimus Registered User Join Date: Mar 2002 Location: woodstock, alabama, usa Posts: 938	Andy, put that oil pump on and try it. your due for some good luck. remember, the law of averages says that you can't have bad luck all the time. good luck man, Tony __________________ i survived cancer and kidney stones, but my kids are killing me.

03-08-2005, 10:20 PM	#44
modifiedGMC Registered User Join Date: Oct 2004 Location: Walker Co. Alabama Posts: 474	After reading this thread I'm glad the 425 with 400 tranny I bought is still resting in the 79 fleetwood out back! I started to put it in my GMC but when I got the 425 fired up it didn't sound too healthy so I went with a 350 4 bolt chevy. If you need any parts (hopefully not) give me a holler. __________________ If it don't fit, force it,...If it still don't fit , modify it 'till it does fit !!!

03-08-2005, 11:06 PM	#45
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	update...I got 40PSI when i fired it up today. http://67-72chevytrucks.com/vboard/s....php3?t=144838 Lets see....questions and comments here... Lux..thanks, i knew that at one timne, but had completely slipped my mind. Now, if I were to mill my oil pump body...that would increase my oil pressure...would there be any reason NOT to do this? CPNE, you make a good point, however, I had just spun her up to 4000...I hadn't been holding it. I was trying to get in front of an old POS station wagon that was spewing oil and smoke from it's tail pipe. Kinda ironic in hindesight huh? And it wasn't my only mode of transportation...I'm hoildin onto the town car for this exact reason. Once the truck proves reliable, then I'll get rid of it. From what I understand, 4 k isn't all that hard on it...but 5k is askin for trouble. While yes, it was dormant for a long time...I have run it about 5 hrs all together over the last couple months, bringing it up to full operating temp, gone through about 5 or 6 oil chainges to flush out some contaminants (like fuel in the oil with the electric pump blowin it by the needles on the edelbrock) Then, on Sunday i drove her all over town all day. A couple short sprints on the freeway, but mostly just bumpin around on the surface streets. I looked at the odometer before leavin the shop today, and I drove it about 70 or so miles on sunday. So even though it had been dormant, I had run it a bit and it should've been good to go.



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03-08-2005, 11:33 PM	#46
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	does it still run smooth? I have heard of engines sitting for a while wiping out the lobes after being brought back to life. one guy at work found this out the hard way with his HIGH dollar BB (over $8000) __________________ Man rule #77...if you own a 67 stepside with a caddy 472 you will never be in danger of loosing you man card

03-09-2005, 12:41 AM	#47
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	yep, ran smoothe, strong as an ox....made me want to drive it home...but it isn't leavin the lot untill i rebuild the oil pump and cut the oil fiolter open. oh yeah, and drain the oil again too.

03-09-2005, 02:11 AM	#49
VetteVet Msgt USAF Ret Join Date: Jan 2005 Location: Kalamazoo, Michigan Posts: 8,709	oil pump Here Is a picture I found of an exploded view of an oil pump. I see yours is external. I'm not too familiar with caddys but this pic shows the pump IPB and the relief valve that you've been discussing . This is an AMC unit BTW. VetteVet--hope shes ok Attached Images __________________ VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative.

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