Finished my belts. Does it sound normal?

[redcoupe86]

I just want some piece of mind. Can someone tell me if it sounds normal? I just changed my belts with new pulleys. Ive got about 15 miles on the car with the new belts. The video below shows the sound after car is fully warmed up. I used the Arnnworx tool and I had my numbers dead on from what they suggest.

Also, aside from the belt/roller noise, the tap/ticking noise - Normal? Not normal?

I was listening to other 944 videos of engines and I didn't seem to hear that sound, or at least to that extend. This head had a rebuild 1500 miles or so. PO told me that the mechanic said the lifters looked good. New rod bearings were installed as well, and "coated" <-- not 100% sure with what. Also the PO has an oil that is a lighter oil than 20/50. Cant remember what weight off the top of my head, I'll have to look tonight, but I will be switching to gibbs 15w-50.

I cant tell if its just typical valve train noise or injector noise or something more ominous, but it tends to go away off idle.



944 turbo - engine sound - YouTube

[rick13]

No. Check your timing.
Very "whiny"

[redcoupe86]

My timing is dead on.

I've heard the plastic rollers are noisier than the metal one's, but I've only seen that once.

I do know I checked and double checked the belt tension with the Arnnworx tool and I was dead on there too. So I'm not sure what I would do different.

Would it be safe to drive this for a while until I retention in 1500 miles.

[Techno Duck]

Sounds acceptable.

Depending how tight you made the balance belt it will whine a little, also too much preload on it with the idler pulley will cause the same thing.

The exhaust leak is probably killing your spool up!

[redcoupe86]

Not an exhaust leak - it's my injectors! confirmed this yesterday.

[Porsche-O-Phile]

Going to say injectors tick and new belts will whine a lot. Retension in 1,200 miles and it'll eventually subside some.

[Porsche-O-Phile]

Occasionally you may get a tick from a lifter that's a little bound up. Soaking them in ATF for a few days helps if the noise is really driving you nuts.

[rick13]

My timing was dead on too ...I tensioned, re-tensioned, timed, then re-timed...turns out I was a couple teeth off. My mark wasn't very clear on the flywheel. Additionally it is dark by nature at the back of the engine...and we are expected to see through that little window on some caca-mamey angle. Lol. Finally I got it

Bottom line...my car went from... 'hey bro, I think you're power steering pump is whining' to...'Man your car is quiet.'

PS. There is also a mark at the bottom of the bell housing.

[AaronM]

Sounds completely normal to me.