HELP!!! Coolant Leak On Back Of Motor On 97 5.7L - Chevrolet Forum - Chevy Enthusiasts Forums

Go Back   Chevrolet Forum - Chevy Enthusiasts Forums > Current Chevy Trucks, SUV's, Crossovers & Vans > Silverado & Fullsize Pick-ups
Log In 

Silverado & Fullsize Pick-ups The Silverado has been one of the best selling trucks in the US for decades, and is truly proven to be "like a rock".

2014 Chevy Silverado
Platform: Truck, GMT 400, 800, & 900
Sponsored by: Bakliner

LinkBack Thread Tools Search this Thread
Old 10-15-2011, 10:35 AM
CF Beginner
Join Date: Oct 2010
Posts: 26
Default HELP!!! Coolant Leak On Back Of Motor On 97 5.7L

I have a coolant leak on my 1997 GMC Savana 5.7L on the back of the engine. It seems to leak only a couple hours after sitting, say overnight. It hesitates when I hit the gas after it sits. It also has a bit of a popping sound in the exhaust. I got a Check Engine Light that the trouble codes were PO171 and PO174.

I changed the thermostat thinking that is what leaked, but it wasn’t. I replaced the fuel filter and it still hesitates. Is it the lower intake manifold and would that leak coolant?? Also has anyone changed the intake gasket themselves??

I have done a video showing everything in detail: 97 GMC Savana Coolant Leak on 5.7L - YouTube

If you have any questions or need clarification, do not hesitate to ask.

Thank you for any help.
1997 Chevy Express 5.7L
Reply With Quote
Old 10-15-2011, 02:48 PM
kevinkpk's Avatar
CF Addict
Join Date: Jul 2011
Posts: 2,654
not anymore Kevin Koloff

Those codes are O2 sensor upstream, both sides. Is there any white smoke? Also I cannot tell from the video if it is the intake or head gaskets. Zoom in better so I can see. The head gasket would cause an O2 sensor to give false readings, and both sides leaking if it is a head gasket would explain that. Has the engine ever overheated? What has changed?
Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
Oil In Coolant, But No Coolant In Oil dlaroche General Tech 2 10-29-2014 07:17 PM
95 caprice low oil pressure when warm and coolant in oil leak help!!! Eric Sherden Caprice 2 09-24-2013 01:21 PM
help needed with codes p0308 p0358/and coolant leak mutineer Tahoe & Suburban 2 04-22-2012 07:19 AM
Coolant Leak Help Locating jrhody General Tech 7 03-30-2011 08:38 AM
Bar's Leak for coolant leak 95wt General Tech 4 05-30-2008 03:07 PM

01, 1997, 57, 97, back, chevy, coolant, engine, gmc, intake, leak, leaking, motor, savana, side, silverado, truck

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On


All times are GMT -5. The time now is 05:30 AM.