I think if I had put silicone on those long bolts when I replaced the water pump last year I would not have had to do this. Sorry for the major delay, but today I was able to test drive the repair and nothing leaked. It burns about 1qt of oil over a 5K change and I have been putting synthetic in it since 200K, so I think it has some life left and I would like to aim for 300K out of this motor. The background on this car is it was a company car I got in 2008 with 65K on it, I drove it for work until 220K when they retired it and I bought it in 2011, I let my son drive it since. I am guessing they are hydraulic since I have never had to adjust the valves in the 5 years I have driven the car. I don't have any extra money and I can hear the valve train ticking of late which leads me to believe I probably should plan on valve lifters soon, so If I think I can get another 50 K out of the chain I might let it ride and save my money for valve lifters. While I am in there I may replace the chain and gears unless they look good. Seeing what this cover looks like by itself tells me I am going have to remove it, clean it up and replace the gasket. On the car it seemed to be in the middle of the cover as I have only taken off the hose and the pump, but it appears it is a failure of the gasket between the cover and the block where the water passage is. Here is a picture I found of the cover I have and I circled in green where the leak is. I will put a new chain on it while I am in there obviously, anything else I should pay attention to while I have that open? I found a replacement at JC Whitney for 119.00, any other places I could check for a replacement timing chain cover besides the expensive dealer part? I will put up pics after I finish getting it off the car tomorrow. I removed the pump and got my mirror and a bright light and I can see the red area where it is coming from.Īnybody else seen a timing chain cover do this?
#Gm 3.1 timing cover gasket replacement crack
It is coming out from what must be a stress fracture or crack on the middle of the timing chain cover right under where the right side of the water pump is. I jump into my alldata account to investigate the repair and I see that the water pump mounts to the timing chain cover and there is no gasket where the coolant spews from under pressure. I thought after seeing this leak that the water pump must mount on a manifold that bolted to the timing chain cover, and it needed a new gasket. The car has a coolant leak from underneath the water pump. Long story short, car starts to get hot, is leaking coolant, too fast to limp it home, I meet the wrecker with new hoses for the radiator, upper and lower (originals with 250K were on it), after replacement I still have a leak.
I have a 2006 that has just rolled over 250,000 miles, the water pump was replaced by me at 225,000.
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