The 1947 - Present Chevrolet & GMC Truck Message Board Network

Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > Info Center > FAQ Truck Tech > 73-87


Thread Tools Display Modes
Old 05-18-2015, 03:10 PM   #1
Registered User
Join Date: May 2013
Location: Parkersburg, WV
Posts: 42
Need Input, Engine Noise

So recently swapped engines on my 85 c10, went to 468 cu in BBC (454 bored .60 over). It was broke in w Joe Gibbs break-in oil and currently running 15w-50 Joe Gibbs now. I went to take the truck for the first drive did not ever drive it before, just ran to time, make carb adjustments, and on and off the trailer for exhaust. Did not make it but a mile down the road started a loud popping noise, shut it off instantly, and towed it back to my garage. Oil is milky so I am thinking blown head gasket.. but seems quite abrupt as no problems ever before until now, any thoughts on what could be making the noise?
Vette 350 Dropped 85 C10, NOS Equipped.
62 Nova Wagon 355, Heidts front end, Pushing 500
1984 Cutlass Supreme 350
1999 Tahoe
1990 B2200 Mazda(gas getter)
Want2Run is offline   Reply With Quote
Old 05-27-2016, 09:37 AM   #2
Registered User
Woodyboat's Avatar
Join Date: Feb 2016
Location: Clarksville, Tn.
Posts: 183
Re: Need Input, Engine Noise

I am not a pro-mechanic by any means. But I do know that milky oil is a sign of moisture that has gotten mixed in. And so, I think you're correct because a bad head gasket is really the only place where moisture could get in.

Has your coolant level changed?

Also, does the oil have any sort of coolant odor?

If not coolant odor, what about any hint of gasoline odor. I think that, if gas has gotten in there, that may give a similar symptom.

I'm surprised that others, who are more knowledgeable than me, have not chimed in.
Woodyboat is offline   Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -4. The time now is 03:50 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Copyright 1997-2013