Grand Vitara 2005 rattling from engine

biko

Thought it was idler pulley so swapped that today but still there
Possibly timing chain tensioner or the chain itself.

What say ye?

https://www.youtube.com/watch?v=0fRWFgbtW8Q

mullingar

Open up the oil filler cap and if the rattle is louder, I'd wager its it's the chain

biko

Yeah, sounds like it alright.

There are 2 chains in this engine J20A and the top chain tensioner is controlled by oil pressure.
Although I have been good with oil changes the previous owner may not have been and so there could be sludge blocking this tensioner's operation.



I will try an oil flush and see if this helps.

JohnBoy26

biko wrote: »

Yeah, sounds like it alright.

There are 2 chains in this engine J20A and the top chain tensioner is controlled by oil pressure.
Although I have been good with oil changes the previous owner may not have been and so there could be sludge blocking this tensioner's operation.



I will try an oil flush and see if this helps.

If the engine has a bit of mileage up flushing is not a good idea.

biko

I hear different opinions about this, no-one really elaborates on why and occasionally I read an account somewhere where someone think it may have caused a problem.
I think my seals are in good enough shape to handle it *crosses fingers and toes*

Anyway, that discussion is for a different thread.

Toyotafanboi

I think it's based on the idea that the carbon that has built up on surfaces over time is contributing to maintaining tolerances that are otherwise compromised by wear. The thing is if the engine already has a rattle you havn't got much to lose by chancing a flush. Best case it fixes it, worst case you're still where you are, with a rattle in the engine.