Another HELP question this time Urgent - The 1947 - Present Chevrolet & GMC Truck Message Board Network

64Magoo · 05-20-2008, 10:00 PM

I just rebuilt my Rochester 2gc and put it back on the engine. It ran great for about 5 minutes and then I started hearing a loud knocking sound coming from somewhere in my engine but I can't tell where. Next thing I notice is puddles of what looks like blackened coolant from my exhaust pipes about 4 feet long and sprayed on my tires (I have turndowns just after the cab angles out slightly towards the side of the truck). What happened? I plugged the intake manifold when the carb was off so I don't think anything got in it, and I noticed that my coolant is pretty much gone after this happened (it was full prior). My water pump is new so what could be the problem?

jchav62 · 05-20-2008, 10:06 PM

Sounds to me like something fell into the intake...like a nut or bolt and got sucked in...

Tim64 · 05-20-2008, 10:29 PM

Did you check the oil? If you have coolant in the oil I'd say head gasket.
Good luck,
Tim

**Chevy Fleetside** · 05-20-2008, 10:30 PM

Quote:

Originally Posted by jchav62

Sounds to me like something fell into the intake...like a nut or bolt and got sucked in...

Yes I had that happen once. Cracked a cylinder and dumped all the coolant in teh chamber. No smoke only because the nut beat the crapola out of the spark plug and it wasn't firing. Sounds like you need to pull the head

64Magoo · 05-20-2008, 11:35 PM

I have a built 350 with 0 miles sitting in my buddies garage all plugged and wrapped just waiting to go into my truck and I think it might be about time. I just couldn't "fix what ain't broke" but I think this might be a push in the right direction.

**Chevy Fleetside** · 05-21-2008, 02:35 AM

Well don't forget to open up the enigine and see what happened..

salazar44 · 05-21-2008, 03:07 AM

i also had a nut in my 283 when I got it! the piston was pretty jacked! I think I still have it saved for memories.

billydonn · 05-21-2008, 04:13 AM

I would look first for missing butterfly screw in carb.

Anthony Fremont · 05-21-2008, 05:00 AM

Quote:

Originally Posted by Chevy Fleetside

Well don't forget to open up the enigine and see what happened..

I agree. Please post pictures.

64Magoo · 05-21-2008, 05:13 AM

Will do when I yank it

71swb4x4 · 05-21-2008, 05:22 AM

Quote:

Originally Posted by 64Magoo

Will do when I yank it

Please, no pictures of that. This isn't that kind of board.

Mykul · 05-21-2008, 06:15 AM

Quote:

Originally Posted by 71swb4x4

Please, no pictures of that. This isn't that kind of board.

64Magoo · 05-21-2008, 07:58 AM

I didn't say "wank it" you sicko

05-20-2008, 10:00 PM	#1
64Magoo Registered User Join Date: Jan 2008 Location: Bakersfield CA Posts: 265	Another HELP question this time Urgent I just rebuilt my Rochester 2gc and put it back on the engine. It ran great for about 5 minutes and then I started hearing a loud knocking sound coming from somewhere in my engine but I can't tell where. Next thing I notice is puddles of what looks like blackened coolant from my exhaust pipes about 4 feet long and sprayed on my tires (I have turndowns just after the cab angles out slightly towards the side of the truck). What happened? I plugged the intake manifold when the carb was off so I don't think anything got in it, and I noticed that my coolant is pretty much gone after this happened (it was full prior). My water pump is new so what could be the problem?

05-20-2008, 10:06 PM	#2
jchav62 1962 C-10 Join Date: Apr 2005 Location: Las Vegas, New Mexico Posts: 4,978	Re: Another HELP question this time Urgent Sounds to me like something fell into the intake...like a nut or bolt and got sucked in... __________________ Joseph Chavez "See the USA in a Chevrolet!!" ......................_____ .........________//__{\_____ ,,,,,,,/__(O)___//___/__(O)_/ 1962 C10 Shortbed Fleetside 327/th350 GV overdrive 1974 C10 Longbed Fleetside 350/th350 "The Trash Truck" 1999 Chevy 2500 OBS, Longbed 5.7/4L80E 4x4 2015 GMC Sierra SLE 1500 4x4

05-20-2008, 10:29 PM	#3
Tim64 Registered User Join Date: Aug 2007 Location: Vandalia, Ohio Posts: 396	Re: Another HELP question this time Urgent Did you check the oil? If you have coolant in the oil I'd say head gasket. Good luck, Tim

05-20-2008, 11:35 PM	#5
64Magoo Registered User Join Date: Jan 2008 Location: Bakersfield CA Posts: 265	Re: Another HELP question this time Urgent I have a built 350 with 0 miles sitting in my buddies garage all plugged and wrapped just waiting to go into my truck and I think it might be about time. I just couldn't "fix what ain't broke" but I think this might be a push in the right direction.

05-21-2008, 02:35 AM	#6
Chevy Fleetside Registered User Join Date: Sep 2006 Location: San Francisco Posts: 4,779	Re: Another HELP question this time Urgent Well don't forget to open up the enigine and see what happened.. __________________ "A man and his truck, what a beautiful thing" 65 Short Fleetside BBC 65 Long Fleetside 283 3 on the tree for now. my build thread http://www.67-72chevytrucks.com/vboa...d.php?t=259536

05-21-2008, 03:07 AM	#7
salazar44 65 - Chevy C10 Join Date: Jun 2006 Location: Los Angeles, CA Posts: 625	Re: Another HELP question this time Urgent i also had a nut in my 283 when I got it! the piston was pretty jacked! I think I still have it saved for memories. __________________ VIC One Repair Leads to Another! http://vix65chevyc10.blogspot.com

05-21-2008, 04:13 AM	#8
billydonn Council of the Elders Join Date: Mar 2008 Location: Omaha, NE Posts: 212	Re: Another HELP question this time Urgent I would look first for missing butterfly screw in carb. __________________ 66 C-10 Stepside 350 Tuned Port Injection Tremec TKO-600 Truck Pictures: http://community.webshots.com/user/billydonn Truck Video: http://good-times.webshots.com/video...ost=good-times

05-21-2008, 05:13 AM	#10
64Magoo Registered User Join Date: Jan 2008 Location: Bakersfield CA Posts: 265	Re: Another HELP question this time Urgent Will do when I yank it

05-21-2008, 07:58 AM	#13
64Magoo Registered User Join Date: Jan 2008 Location: Bakersfield CA Posts: 265	Re: Another HELP question this time Urgent I didn't say "wank it" you sicko



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