Engine Knock :( any ideas?

[CRZYBIKER]

300A, 53K miles, changed my own oil as I have done (even professionally) for years, using a house brand oil filter from the local parts shack and Valvoline 5W20. Now I have a knock (very faint, but there) at idle and only when in gear. It is a very heavy sounding low knock not fast enough to be a rod, corresponds more with each rev of the crank. If it is in park or at any other speed it is gone. Any ideas? I may try a different oil filter, but that’s just a stab in the dark.:help:

[fastblackmerc]

Loose torque converter bolts?

[CRZYBIKER]

Thanks, I will have to check that. I did forget to mention is is only after the engine is at operating temperature.

[Marauderjack]

Timing chain tensioner....

Try 5W30 oil and see if it goes away!!:beer:

OP with 5W20 is fairly low at idle when hot and I suspect that in gear it drops enough to alow the chain to slap a bit??:confused:

I was always concerned about the knocking at startup after changing the oil and was told it wasn't rod knock as I suspected but the tensioner (s)....

My $.02??:cool:

Marauderjack:burnout:

[Zack]

Carbon build up.
Go beat the piss out of it.

[Loco1234]

Ya hate that Carbon build up...
Its a dirty job but I sure do enjoy romping ojn the pedal a bit to clear the build right outta there.....

YOu know find a big hill and or mountain and floor it.... run throught the RPM range and don't hold back....


....and try changing your oil...LOL

[CRZYBIKER]

All great Feedback, Thanks guys. I think you may have a very valid point about the chain tensioner MJack, I have the Lidio tune so the idle is lower than stock, if I raise the idle (manually) about 100 RPM the noise does in fact go away. I think the SCT software allows user adjustable idle, but I may be wrong. If it does I will raise the idle 100. May be carbon I suppose, but I do drive fairly hard (WOT) weekly.

[KillJoy]

but I do drive fairly hard (WOT) weekly.

Awwwww.....that's so cute :)

I got 2 speeds.....stopped and floored :D

KillJoy

[CRZYBIKER]

Awwwww.....that's so cute :)

I got 2 speeds.....stopped and floored :D

KillJoy


Man, If I had your car I would too! LOL
A Trilogy kit is on my list, so thats why I am so worried about this knock.

Update: getting progressively worse after 25 miles,checked converter bolts etc. Shes goin to the dealer DOH!