Last post on Oct 15, 2013 at 5:24 AM
You are in the Chevrolet Suburban & Tahoe
What is this discussion about?
Chevrolet Suburban, Chevrolet Tahoe Limited/Z71, Engine, SUV
#26 of 29 Re: Suburban 5.3L coolant leak into engine [daves67]
Jan 28, 2013 (7:39 am)
You may want to check your heads to see if they are casteck heads. There is a document out there # 06-06-01-019b put out to gm mechanics to let them know about bad castings of these heads. they have porosity in the metal whick is leaking thru to the lifter area but evaporating because of heat leaving a sludge mix oil.
#27 of 29 Re: 01 Chevy Suburban loosing coolant [bena8837]
Feb 04, 2013 (9:29 am)
I have a 2004 Tahoe LT with the 5.3 flex fuel engine, that I bought new. I have the very same problem that you have described. At about 40,000 miles, I noticed that coolant was always being added when I had the oil changed at a 'quick lube' shop. This got worse by 80,000 miles. The dealer did a pressure test and found no leak or drop in the pressure. I am having to add about a pint every 200 hundred miles. The lube shop suggested a Radiator shop and they suggested to replace the coolant reservoir cap. THAT, has fixed the problem.
#28 of 29 Does anyone here know what they are saying?
Oct 06, 2013 (2:09 pm)
I see so many here talking about coolant leaking in the 5.3 engine, well people, the 5.3 engine is designed so no coolant can leak into it! 5.7 is different, they had serious coolant leak into engine issues, but those with 5.3 are not having issues with coolant leaking into the engine via intake because this cannot happen!
#29 of 29 Re: Does anyone here know what they are saying? [teddybeard]
Oct 15, 2013 (5:24 am)
Please explain your comment.
I have a 5.3 which is burning coolant. The exhaust smells of coolant and I have to add coolant daily. I don't have any coolant puddles on the ground anywhere I park. I am not a mechanic, but assume coolant must be getting into the engine somehow or it wouldn't be coming out the tailpipe as smoke.