wrist pin sound
#1
wrist pin sound
Can any one tell me what a bad wrist pin sounds like?Is it hard and loud like a bad rod bearing, or is it more like a bad lifter tap? The sound I am hearing is coming from the center of the right bank just behind the motor mount. It is a tapping that can be heard good with a stethoscope the engine is a 2000 chevy 4.3.
Thanks
Thanks
#2
RE: wrist pin sound
What you are describing sounds more like piston slap to me. A wrist pin noise would be similar to a lifter tap, but louder.
#3
RE: wrist pin sound
At what RPM are you hearing it knock? I still have two knocks in my 97 4.3 one that comes in at about 2000 RPM with NO LOAD, UNDER LOAD I don't hear it. It has been doing it for 12,000 miles hasn't gotten worse. I was going to replace the engine but as long as it keeps running I will just drive it. It runs great except for the knocks. I also have a knocking noise at idle that who knows what it is, It doesn't seem to be connected to the other knock I only hear it at idle. It has not changed in 12,000 miles. So I have just decided it can knock all it wants as long as it keeps running. I had a 1973 IH 4x4 pickup with a 345 cubic inch V8 & it had a knock, so I completely rebuilt the engine All new bearings, crank, cam, etc, had the heads rebuilt completely, put it back together & 50 miles & the same knock was back. I drove it for 70,000 more miles sold it to a friend that drove it for at least 5 more years before he got rid of it & it could still be running. When the Blazer blows up I'll call a tow truck & have it towed off the road & decide what I'm going to do. This knock has been heard by 4 different mechanics & every one has said it was something different, all said it would go much longer & I would find out when it blew up that was like I said 12,000 miles ago & it is still running great & knocking. Being a retired mechanic myself it must not be anything too serious or it would of come apart by now.
#4
RE: wrist pin sound
At idle I hear it sounde like a lifter or rocker arm. Worse when cold but some times I do not hear it. Then it comes back when I am driving it get faster and sounds like a spark knock.
Can not find the source.
Can not find the source.
#5
RE: wrist pin sound
ORIGINAL: JSPARKS913
At idle I hear it sounde like a lifter or rocker arm. Worse when cold but some times I do not hear it. Then it comes back when I am driving it get faster and sounds like a spark knock.
Can not find the source.
At idle I hear it sounde like a lifter or rocker arm. Worse when cold but some times I do not hear it. Then it comes back when I am driving it get faster and sounds like a spark knock.
Can not find the source.
#6
RE: wrist pin sound
I am running 5w30 with an AC delco oil filter. The engine has only 68000 miles no it. It is in a 2000 Blazer, it has been well taken care of. It runs great with the AC or radio on I can't even hear the tap. But I drive it back and forth from Kentucky to Florida quite often. I am just thinking that it will break on one of the trips.
#7
RE: wrist pin sound
I say just drive it. Carry tow insurance. I carry mine through my insurance company because I can call any tow service & have it towed where I want it towed. The down side is I have to pay up front & it takes a week or so to get a check from the insurance company. I would rather have it that way than sit on the side of the road for hours waiting for AAA. I have Farmers Insurance & they have been real good, the one time I needed a tow.
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