OVERHEATING

Asked by Apr 30, 2016 at 07:37 PM about the 2008 Chrysler Sebring Touring Convertible

Question type: General

I have a 2008 chrysler  sebring  hard top convertible with a 3.5L V6 engine.
Had a local mechanic replace the water pump and he Overheated the
engine,
as there was white smoke coming out the both exhaust pipes at 72,000
miles..
I took it to another shop hed the heads machined, valve job done along
with new head gaskets. About 3 weeks ago (at 82,000 miles, 8 months
after head gasket job) had knock sensor replaced after the check engine
diagnosed it as the problem. The cat still overheats, replaced
radiator,water pump and thermostat in the last 3 months.It runs normal
temp.for 45 minutes and water and steam starts coming out the relief hose
out of the expansion tank, which was replaced about 18 months ago.

3 Answers

11,085

So many hands have been on it I can only speculate. 1. was the engine block inspected and tested to confirm it had NO fractures? 2. Did the car operate at the correct temperature at anytime after the cylinder heads were machined and it was built up? 3. was it checked for leaks or leaking with a dye agent once again checking for a cracked block 4. Its possible an incorrect gasket was used(blocking) flow or debris found its way into a coolant passage in the engine restricting the flow of coolant internally I've seen it. 5. All engine sensors are function correctly,example its been scanned for DTC codes there are none? (Timing not so out spec to cause the issue) 6. Its been tested with a gas analyzer to confirm that there are NO combustion by-products in the coolant system. If the vehicle came to me I would diagnose as described. Regards

yes,after the car ran fine except the check engine lite came on and was advised by the shop that did the head gasket that it needed a knock sensor but it was o.k. to drive as is ($580 to replace it)

11,085

Being unable to check it directly, I can only make a few educated "guesses" now the functioning of cooling fan(s) I would also scan the vehicle again for codes even if there's no check engine light on the computer stores information in a freeze frame mode to capture Data about "events" kind of like a clue or arrow pointing a way.

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