Pulled the motor on the Blazer - The 1947 - Present Chevrolet & GMC Truck Message Board Network

BBrendal · 03-19-2012, 07:56 PM

Well I after procrastianating for a year and with the nice weather I finally pulled the motor out of the Blazer. It runs fine but I had several leaks including the rear main and it just looked plain ugly in there. Ill reseal it and detail the underhood and plop it back in. Couple of suprises I learned... 1 broken motor mount and a cracked driverside exhaust manifold. Is this common for the manifolds to crack? How easy or hard is it to get a replacement or used one? Ill post pic of progress as I go. Any other things I should do while its out?

Dmcinfo · 03-19-2012, 11:42 PM

I'd be interested in seeing how you go about detailing your engine compartment. Hope you take some pics along the way. I'll be starting that process soon and can always learn something new.
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oldschool18 · 03-20-2012, 12:16 AM

those old ramhorn manifolds arnt hard to find they are on ebay and you can check here on the truck and blazer for sale forum. or check in your local area you might be able to pick up set close to home, my father is a mechanic and owns his own business and i bet he has 3 or 4 sets laying around.

mustardjimmy71 · 03-20-2012, 06:03 AM

Replace them with the 2.5" ones. Way better flow. You can get them for under 100$ brand new. Theres a few threads on them

BBrendal · 03-20-2012, 08:24 AM

Quote:

Originally Posted by mustardjimmy71

Replace them with the 2.5" ones. Way better flow. You can get them for under 100$ brand new. Theres a few threads on them

I would replace them but Im not replacing the exhaust. So I need to find a replacement one. Im not sure if it is factory or off a vette. The cast # is 3932461 with a "RH 6" under the part # but Im showing these to be for a vette. The pass side (uncracked) # is 3932465. Both dump straight down and not to the rear of the motor. Anyone have any better knowledge of these?

**Tom Vogel** · 03-20-2012, 09:39 AM

Brian... this exhaust doesnt have one of those exhaust thermostats on that side does it? If it does, check to see that it still rotates by hand and is not restrited in movement. This can cause the exhaust manifold on that side to overheat and crack if it wont open completely after it warms up.

BBrendal · 03-20-2012, 05:56 PM

Quote:

Originally Posted by Tom Vogel

Brian... this exhaust doesnt have one of those exhaust thermostats on that side does it? If it does, check to see that it still rotates by hand and is not restrited in movement. This can cause the exhaust manifold on that side to overheat and crack if it wont open completely after it warms up.

Hey Tom. No heat risers on this set up. It has a replacement Goodwrench motor in it so I think someone may have done some swaping of manifolds. These were in a C3 vette. Is it possible these were used in our trucks too?

Firebirdjones · 03-20-2012, 07:26 PM

If they are truely vette manifolds, they would already be 2 1/2" outlets. These are harder to find OEM but are reproduced.

The trucks (and all other passenger car ramhorns) were 2 1/4" outlets. Very common to find.

BBrendal · 04-28-2012, 11:27 AM

Ok we have made progress! The motor was put back in the blazer yesterday and should be running this week. I did take pictures but they accidentially got deleted so Im missing alot of before pics. Here are some pic so far.

dirty trucker · 04-28-2012, 03:16 PM

Looks nice.. Good job!

rsavage · 04-29-2012, 06:16 AM

Looking great. Brian, I was at Carlisle Friday and Saturday and there was a Blue CST Blazer like yours there with supposedly 29,000 original miles. It was nice, not perfect, but very nice. The owner put it through the auction but it didn't sell - he was asking $37,500!

jaros44sr · 04-29-2012, 08:57 AM

Now your engine bay looks as good as the rest of your truck, well done! Thats cool having the original iron intake for the quadrajet

BBrendal · 04-29-2012, 10:11 AM

Thanks guys! Wow Rick 37,500 for a stock Blazer with supposedly 29000 on it. Wow thats the highest price stock Blazer Ive heard of. My guess is He probably really didnt want to sell it but if he got some obscene money he would let it go. Did you take any pics?

Firebirdjones · 04-29-2012, 10:38 AM

Looking good. Cleaning things up sure makes them a pleasure to work on from here on out. No more greasy hands

BBrendal · 05-08-2012, 12:25 AM

Well its done, running and has no leaks. I am very happy how it turned out and am glad its done.

And heres the before...

rsavage · 05-08-2012, 06:41 AM

Brian,
It looks like factory new. Great job!

boonedogs72 · 05-08-2012, 10:15 AM

looks great!

67swb72klb · 05-08-2012, 10:24 AM

thats a nice blazer upgrade turned out good

Dmcinfo · 05-08-2012, 12:23 PM

Did you repaint the master cylinder? If so what color is that and what did you use? Thanks.
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BBrendal · 05-08-2012, 12:41 PM

Quote:

Originally Posted by Dmcinfo

Did you repaint the master cylinder? If so what color is that and what did you use? Thanks.
Posted via Mobile Device

Yes I did. Its Eastwood cast blast.

71swb4x4 · 05-08-2012, 12:35 PM

Great job!!

BLUE THUNDER · 05-13-2012, 11:23 PM

Looks great!

gringoloco · 01-01-2013, 09:07 PM

Agreed! This looks GREAT. Nice Blazer

SACRAMENTO 71 · 01-09-2013, 02:50 PM

WOW! Time well spent, makes me think twice about chrome in the eng bay.

03-19-2012, 07:56 PM	#1
BBrendal Recalculating..... Join Date: Nov 2010 Location: New Lenox Il Posts: 686	Pulled the motor on the Blazer Well I after procrastianating for a year and with the nice weather I finally pulled the motor out of the Blazer. It runs fine but I had several leaks including the rear main and it just looked plain ugly in there. Ill reseal it and detail the underhood and plop it back in. Couple of suprises I learned... 1 broken motor mount and a cracked driverside exhaust manifold. Is this common for the manifolds to crack? How easy or hard is it to get a replacement or used one? Ill post pic of progress as I go. Any other things I should do while its out? __________________ Brian - (BBrendal) 1969 Chevy Camaro Z28 1972 Chevy Blazer CST 2004 GMC Yukon (The truck that pulls the car trailer) 1972 Chevy Blazer CST #2 (Finished and sold!) Blazer build link... http://s1213.photobucket.com/albums/...rendal/Blazer/

03-19-2012, 11:42 PM	#2
Dmcinfo Registered User Join Date: Oct 2011 Location: Sacramento, ca Posts: 47	Re: Pulled the motor on the Blazer I'd be interested in seeing how you go about detailing your engine compartment. Hope you take some pics along the way. I'll be starting that process soon and can always learn something new. Posted via Mobile Device

03-20-2012, 12:16 AM	#3
oldschool18 Registered User Join Date: Jan 2010 Location: Hollidaysburg, PA Posts: 785	Re: Pulled the motor on the Blazer those old ramhorn manifolds arnt hard to find they are on ebay and you can check here on the truck and blazer for sale forum. or check in your local area you might be able to pick up set close to home, my father is a mechanic and owns his own business and i bet he has 3 or 4 sets laying around. __________________ _________________________________ 62 Impala 70 C-10 LWB 71 K-10 SWB 85 C-10 LWB==SOLD 01 2500 HD Members Met......2003Silverado (Dave)

03-20-2012, 06:03 AM	#4
mustardjimmy71 toys'r'us Join Date: Nov 2010 Location: Penticton, BC, Canada Posts: 347	Re: Pulled the motor on the Blazer Replace them with the 2.5" ones. Way better flow. You can get them for under 100$ brand new. Theres a few threads on them __________________ 71 jimmy bone stock 350 sm465 33x12.5 rallies 79 caprice landau full load crate350 th350 lowered 20"wires 00 f150 reg cab sb 4x4 5.4L

03-20-2012, 09:39 AM	#6
Tom Vogel 2WD Jimmy Join Date: Mar 2005 Location: Davis County, Utah Posts: 2,563	Re: Pulled the motor on the Blazer Brian... this exhaust doesnt have one of those exhaust thermostats on that side does it? If it does, check to see that it still rotates by hand and is not restrited in movement. This can cause the exhaust manifold on that side to overheat and crack if it wont open completely after it warms up.

03-20-2012, 07:26 PM	#8
Firebirdjones Registered User Join Date: Oct 2009 Location: Prescott, Arizona Posts: 2,396	Re: Pulled the motor on the Blazer If they are truely vette manifolds, they would already be 2 1/2" outlets. These are harder to find OEM but are reproduced. The trucks (and all other passenger car ramhorns) were 2 1/4" outlets. Very common to find.

04-28-2012, 11:27 AM	#9
BBrendal Recalculating..... Join Date: Nov 2010 Location: New Lenox Il Posts: 686	Re: Pulled the motor on the Blazer Ok we have made progress! The motor was put back in the blazer yesterday and should be running this week. I did take pictures but they accidentially got deleted so Im missing alot of before pics. Here are some pic so far. __________________ Brian - (BBrendal) 1969 Chevy Camaro Z28 1972 Chevy Blazer CST 2004 GMC Yukon (The truck that pulls the car trailer) 1972 Chevy Blazer CST #2 (Finished and sold!) Blazer build link... http://s1213.photobucket.com/albums/...rendal/Blazer/

04-28-2012, 03:16 PM	#10
dirty trucker Registered User Join Date: May 2008 Location: AuGres, Mi Posts: 82	Re: Pulled the motor on the Blazer Looks nice.. Good job!

04-29-2012, 06:16 AM	#11
rsavage Registered User Join Date: Aug 2009 Location: Alden NY Posts: 2,705	Re: Pulled the motor on the Blazer Looking great. Brian, I was at Carlisle Friday and Saturday and there was a Blue CST Blazer like yours there with supposedly 29,000 original miles. It was nice, not perfect, but very nice. The owner put it through the auction but it didn't sell - he was asking $37,500! __________________ 1961 C1 Corvette 1959 El Camino 350 TPI, 9" 4 w disc 69 Blazer K5 - sold July '20 2021 Durango RT 5.7

04-29-2012, 08:57 AM	#12
jaros44sr Registered User Join Date: May 2006 Location: Philadelphia, Pa. 19454 Posts: 9,457	Re: Pulled the motor on the Blazer Now your engine bay looks as good as the rest of your truck, well done! Thats cool having the original iron intake for the quadrajet __________________ Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim

04-29-2012, 10:11 AM	#13
BBrendal Recalculating..... Join Date: Nov 2010 Location: New Lenox Il Posts: 686	Re: Pulled the motor on the Blazer Thanks guys! Wow Rick 37,500 for a stock Blazer with supposedly 29000 on it. Wow thats the highest price stock Blazer Ive heard of. My guess is He probably really didnt want to sell it but if he got some obscene money he would let it go. Did you take any pics? __________________ Brian - (BBrendal) 1969 Chevy Camaro Z28 1972 Chevy Blazer CST 2004 GMC Yukon (The truck that pulls the car trailer) 1972 Chevy Blazer CST #2 (Finished and sold!) Blazer build link... http://s1213.photobucket.com/albums/...rendal/Blazer/

04-29-2012, 10:38 AM	#14
Firebirdjones Registered User Join Date: Oct 2009 Location: Prescott, Arizona Posts: 2,396	Re: Pulled the motor on the Blazer Looking good. Cleaning things up sure makes them a pleasure to work on from here on out. No more greasy hands

05-08-2012, 12:25 AM	#15
BBrendal Recalculating..... Join Date: Nov 2010 Location: New Lenox Il Posts: 686	Re: Pulled the motor on the Blazer Well its done, running and has no leaks. I am very happy how it turned out and am glad its done. And heres the before... __________________ Brian - (BBrendal) 1969 Chevy Camaro Z28 1972 Chevy Blazer CST 2004 GMC Yukon (The truck that pulls the car trailer) 1972 Chevy Blazer CST #2 (Finished and sold!) Blazer build link... http://s1213.photobucket.com/albums/...rendal/Blazer/

05-08-2012, 06:41 AM	#16
rsavage Registered User Join Date: Aug 2009 Location: Alden NY Posts: 2,705	Re: Pulled the motor on the Blazer Brian, It looks like factory new. Great job! __________________ 1961 C1 Corvette 1959 El Camino 350 TPI, 9" 4 w disc 69 Blazer K5 - sold July '20 2021 Durango RT 5.7

05-08-2012, 10:15 AM	#17
boonedogs72 Registered User Join Date: Apr 2005 Location: redding ca Posts: 1,438	Re: Pulled the motor on the Blazer looks great!



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05-08-2012, 10:24 AM	#18
67swb72klb Registered User Join Date: Dec 2010 Location: livingston co.mi Posts: 2,452	Re: Pulled the motor on the Blazer thats a nice blazer upgrade turned out good __________________ California 65 GTO---Texas 64 burb 283 ---Oklahoma 67 CST SWB BBW wood bed 327 2004r---New Mexico 72 k10 350 350 auto---Georga 72 short step project

05-08-2012, 12:23 PM	#19
Dmcinfo Registered User Join Date: Oct 2011 Location: Sacramento, ca Posts: 47	Re: Pulled the motor on the Blazer Did you repaint the master cylinder? If so what color is that and what did you use? Thanks. Posted via Mobile Device

05-08-2012, 12:35 PM	#21
71swb4x4 Senior Member Join Date: Nov 2003 Location: Brookings, SD Posts: 10,497	Re: Pulled the motor on the Blazer Great job!! __________________ Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs.

05-13-2012, 11:23 PM	#22
BLUE THUNDER Registered User Join Date: May 2007 Location: San Antonio Posts: 993	Re: Pulled the motor on the Blazer Looks great!

01-01-2013, 09:07 PM	#23
gringoloco A guy with a truck Join Date: Sep 2005 Location: Germany, for now Posts: 5,920	Re: Pulled the motor on the Blazer Agreed! This looks GREAT. Nice Blazer __________________ -Chris Instagram _elgringoloco_ '70 Short-Wide How to: Ruin a perfectly good C10 ‘70 Blazer ConversionHow To: Ruin a Perfectly Good 4wd '72 Highlander How To: Ruin a Perfectly Good K/5 (SOLD) '72 Blazer 2WD How to: Ruin a perfectly good Blazer (SOLD) '05 Yukon Daily Driven (not so stock) Yukon (SOLD) ‘07 Yukon Denali (daily) Members met list: SCOTI, darkhorse970, 67cheby, 67cheby'sGirl, klmore, porterbuilt, n2billet, Fastrucken, classicchev, Col Clank, GSFMECH, HuggerCST, Spray-Bomb, BACKYARD88, 5150, fine69, fatbass, smbrouss70, 65StreetCruiser, GAc10boy

01-09-2013, 02:50 PM	#24
SACRAMENTO 71 Registered User Join Date: Aug 2012 Location: Sacramento, CA Posts: 242	Re: Pulled the motor on the Blazer WOW! Time well spent, makes me think twice about chrome in the eng bay. __________________ 68 C10 SWB W/ 72 FRONT CLIP 343SB TH400 64 C10 SWB 406SB TH400 74 SUBURBAN 454BB TH400 78 K10 SWB 350 TH350 6" ON 35" BFG MUD 71 K5 350 W/ TBI 700R4 6" ON 38" BFG MUD 00 K3500 DRW BIG BLOCK "DRINKING PRBLM"

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