- This topic has 5 replies, 5 voices, and was last updated 12 years, 4 months ago by
.
-
Topic
-
-
Replies
-
Are you sure its not valve train noise rather than knocking as an engine knock would be consistent in most cases.
That’s possible GM build quality is not what it used to be. The first thing I would check is that you are using the correct oil for your engine and that it’s filled to the proper level. Don’t use synthetics as they can actually cause the engine to make more noise and cause leaks. The real question is where is the noise coming from? Find out that and you will have a better idea of what the cause is, here is a video for you.
If your cars have the 3.1 or 3.4 (not the dohc) you are right about the pistons. They are not loose fitting, they virtually have no skirt so they slap around inside the cylinder bore. GM’s answer to that was to add a patch of teflon to the thrust side of the piston, which wears off after time and you still have the same situation. I’ve replaced God knows how many pistons under warranty for this exact concern. It is not detrimental to the engine, just an annoyance. But, like the previous posts stated, best to make sure the source of your noise
Quoted From EricTheCarGuy:
That’s possible GM build quality is not what it used to be. The first thing I would check is that you are using the correct oil for your engine and that it’s filled to the proper level. Don’t use synthetics as they can actually cause the engine to make more noise and cause leaks. The real question is where is the noise coming from? Find out that and you will have a better idea of what the cause is, here is a video for you.
The beginning of this video still makes me laugh!
- You must be logged in to reply to this topic.