How would this happen? We took 1995 chevy s-10 to shop for a new full pump. Got the truck back leaking oil like crazy. Man at shop said there is a 3-4 inch crack in the plastic timing chain cover. Has anyone heard of this. Did they do something to the truck? It never leaked any oil. Not a drop.
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Re: timing chain cover cracked
A cracked cover will not cause a leak. Overtightening the cover will cause a problem or perhaps they mishandled it and broke it and tried to put it back on. The seals around the camshafts may be at fault. When they replaced the fuel pump they should not have messed with this so I would have them explain what they did.
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Check the lower radiator hoses for a leak and the lower part of the radiator itself for a leak. Also, check your engine oil level and make sure you don't have water in your engine oil. If you do, you have most likely lost one of the timing chain guides and the chain has worn a hole in the front cover of the engine or the block has cracked. Another possible problem location could be the water pump leaking at the forward seal.
Remove the engine front cover then drain the engine oil and take out the oil pan. It is under the engine and looks like the bottom of the motor.
Unscrew the oil pump mounting bolts with a wrench and proceed to remove the oil pump itself by pulling it down and out of the engine. Avoid getting any contaminants into the oil pump assembly while removing.
Add fresh oil to the new pump to prime it. Check the alignment on the new oil pump drive with the crankshaft/intermediate crankshaft timing.
Install the new pump carefully, rotating it back and forth a little to make sure it has full surface contact between the pump and the engine block.
Hold the pump in its sealed position and put in the pump mounting bolts, tightening them to 15 ft-lb.
Put the engine oil pan back in and refill the crankcase. Start the engine and check for leaks on the parts you replaced
If you did not have a leak there before you had the work done and you do now, the shop needs to correct the problem. There is no reason why you should need to repair the repair. If they don't see if your dmv has a repair complaint division,,,many states do. As far as a new pan goes, have someone explain what exactly happened to your not leaking pan that warrants a replacement now. (I'd love to hear that answer!) Have another shop take a look and save receipts you will need to present them if you take this further! good luck