Oil Pump

[jeffcoslacker]

Originally Posted by radioman2002

Just an update to my previous post. Our area has been experiencing some cold weather, (for around here) anywhere from -10 to around 0F at night. Last night it got down to about +5F and when I started this car up this morning I had some lifter tapping again, nowhere as bad as before. After about 3-5 min it subsided, For now I am just going to let the car warm up completely before use. I am also going to try the Kero trick again at oil change. I suspsect I either have some weak lifters or the oil channel is not completly clear yet. Thanks again to jeffcoslacker.

I would suggest changing the filter again within 500 miles or so now. Stuff that loosened up will continue to work it's way to the filter, and it may get blocked up with crud if you wait too long. Glad it helped.

[jeffcoslacker]

My '97 has always had a noisy top end when started, especially in cold weather. I usually let it idle for a couple of minutes, then bring the idle up to about 2500 for a few seconds, and it is quiet. I can't tell if it's purging air from the lifters or if it is just the nature of it, but it has been that way since new, and has 117,000 on it now and sounds no different.

[cadgear]

Might be the piston slap issue, that affects all those Gen2 3100s, I think. My 1999 makes noise at startup, but it goes after about five minutes or so. Its just the pistons having excess side clearence when cold, when the pistons warm up they fill the cylinder properly.

[jeffcoslacker]

Originally Posted by cadgear

Might be the piston slap issue, that affects all those Gen2 3100s, I think. My 1999 makes noise at startup, but it goes after about five minutes or so. Its just the pistons having excess side clearence when cold, when the pistons warm up they fill the cylinder properly.

sounds right.

[Abodeen]

I think the first think I would check is the shaft that drives the oil pump. It is located in the top rear of the engine block where the distributor would normally go. You might have to remove the crossover exhaust pipe to access it.