Hi all,

as some know, I changed all chains and tensioners on my AJ26 a few weeks ago. Luckily it wasn't too late.

I was expecting the engine to be quieter than before. Well it is a bit quieter but I still have the 'rattle'/'shatter' of chains running in my engine. I know that chains aren't the quietest method of timing an engine, but I think my V8 seems louder than my V12 and louder than my former Duratec HE in my old Volvo C30.

Are your engines quieter?

Cheers

Damien

 

Did you change or check the gears they do wear as well should be quiet really

 

Was all checked. No movement on the gears... No slack or so. They weren't badly worn. Not really worn at all... Engine only had abou 108k miles.

 

I hear the SC on my XJR and notice the injectors on my XJ8 rather than any noise that sounds like chains.

 

+1 possibly injectors: use your mechanics stethoscope on the fuel rails; most of my occasional noise comes from the injectors.

 

I don't have rails. My really early AJ26 has the integrated injectors. It is def. the chains. You only hear them with the sunroof open and next to other cars...

 

Same here. I don't really hear any chain noise while my motor is running.

 

Thanks for your answers so far.

I was thinking: could it be the belt tensioner/pulley? I know the pulley sounded as if it was grinding some *****... I'll see if I can get a sound clip. It is def. rev-related. So either chains or belt... At least in my opinion.

Are the pulleys/belt tensioners known to fail?

Cheers

Damien

 

Yes, and they can make a variety of noises as they fail.

 

Okay, cheers for that! I know the non tensioning pulley made a few weird sounds... As written. So it wouldn't surprise me if it was that making all the noises. Luckily it only costs around €60 new from Jaguar...

 

Well, my chains are quiet *phew*

BUT the bearing in the pulley was really well worn... Here as a comparisson:


As you can hear, it grinds and crunches nastily... Where as the new (used) part and of later generation is quiet.

€20 invested pretty well. Didn't expect my car to be THIS quiet!

 

Great! Fear the worst, hope for the best.

 

I really am surprised about how much noise a little pulley like that thing can make. My XJ is now as quiet as the exhaust allows it to be

 

I think that pulley is my next issue: hearing some noise, but smelling burning rubber. Fortunately, have a a new new one in stock. Replaced the tensioning pulley three years ago.

Soon as it gets a bit warmer, I will pull the belt . . .