2004 Trailblazer - Tick - Oil Change - I6 4x4

[webdawg]

When I change my oil I have lifter noise. I do not know anything about the internals of the engine but I do know that something is hydraulic.

People keep saying...no lifters, but is is something like that noise.

The funny part is...the noise goes away at about 5k on the oil change. I use synthetic oil and a decent oil filter.

I am about to change again but I was just reading a bit about how the engine works and I was wondering if before this change, right now, I should throw something in to try and clean out some oil passages.

What do you guys think...I was reading about plugging a PCV valve tube, but this does not have one...

Any recommendations?

 

[Mooseman]

You could try a flush before the change. I've seen a few videos of this one being used and seems to work well.

 

[littleblazer]

Strange that it goes away as the oil change progresses. usually they get louder...

You could try a flush.

 

[triz]

Try the amsoil flush before your next oil change. The amsoil flush is very mild and leaves it very clean. In my other car the ticking tended to be a dirty VVTL cam .

http://www.amsoil.com/shop/by-produ...and-protectants/engine-and-transmission-flush

 

[webdawg]

So I was thinking about doing this but some forums are talking about clogging the oil screen.

 

[littleblazer]

On the pickup or the VVT screen?

 

[webdawg]

The screen in the oil pan I guess. I do not know.

 

[DocBrown]

Strange that it goes away as the oil change progresses. usually they get louder...

Yeah. Mine sounded like a diesel when I started it up. I will say this though, the 4.2 I6 was the smoothest running GM motor I ever owned.

 

[Mooseman]

Well, the flush is supposed to dissolve the junk, not break it off in chunks. If anything, it might clean out the CPAS but if you want, you can pull it out and clean it anyway. Won't hurt anything. As for the pickup tube, again, it would probably dissolve anything that gets stuck there.

 

[littleblazer]

I wouldn't worry about it.

 

[triz]

On my Toyota it was the screens that would get dirty. Once cleaned it was GTG.

I've used the Amsoil flush on the TB and was pleased. Engine looks really clean inside vs yellow. It also quieted the engine.

 

[vipergg]

You could also try Auto-RX which gently cleans the internals . A lot of people swear by it. https://www.auto-rx.com/

 

[webdawg]

Anyone think that it could just need its valves adjusted?

 

[Mooseman]

They are hydraulic.

 

[webdawg]

I can still adjust valve lash right?

 

[Mooseman]

Nope. They are self adjusting.