Timing belt questions

[lukits01]

I just had cams installed and I think my mechanic didnt put on the timing belt on correctly. The engine started making this distinct noise every time it has warmed up. My dyno tuner said either the bearings in the timing belt tensioner is stuffed or it wasnt adjusted properly. because apparently the belt was moving forwards and backwards rubbing againts the cover backing plate

but a few days later the sound has completely disappeared

so Im just wondering does the tensioner self adjust itself or something?

How much are the tensioners to replace anyway? and where would I find them? wreckers?

another question is Im about to wash the engine bay and I have left the timing belt cover off, so is it allright if the timing belt got wet?

and if I were to replace the timing belt, is there that much of a difference between standard nissan items and aftermarket stuff like TRUST and NISMO?

sounds hideously expensive for a blue piece of rubber

is there any other cheaper aftermarket belts? or is nissan as low as it gets?

[krzysiu]

Dont ever wash the engine of your car with water. You might cause alot of damage. I know a person that did it. Blew his electrics and all the spark plugs. Use degreaser or get it steam cleaned.

[lukits01]

HAHAHAHA

sorry couldnt help myself

feel sorry for the guy though

offcourse I wont spray water all over the coils thats just dumb

Ive washed the engine a few times

I usually cover the air filter and avoid spraying the electrics

and keep the engine idling while you're washing

seems fine the last few times I did it

arent engines watertight anyway

[R32Big_boy]

Dont know about idling it, but i covered the fuse box, battery and afm&pod with a plastic bag. then blasted it with engine degreaser and a high pressure hose. Also about the timming belt, dont bother with the brand names, its not worth spending big bucks for something that does the EXACT same thing, they dont really last longer either. A lot of time and research has gone into the rubber of timming belts. So dont waste your hard earned cassh.

[pstanbis]

is that noise you heard only apparent when you step off the power ? right near the front of the block ? have a similar thing atm, and would agree, it sounds like a collapsed bearing in the tension adjust idler pully. Gonna get it looked at tomorow, ill let you know how it turns out.... can you let me know if you find out a price though?

cheers

Phil

[pstanbis]

ok, went and saw my local enthusiast/mechanic and he seemed to think it was either the idler pulley or CAS - so we have two mechanics with the same view... good start... tomorow will start the tortuos task of finding the parts...

[lukits01]

pstanbis

sounds like the same problem Im having

I bought a replacement timing belt going to let a mechanic check it out while changing the belt

I'll let you know what they say

[pstanbis]

pstanbis

sounds like the same problem Im having

I bought a replacement timing belt going to let a mechanic check it out while changing the belt

I'll let you know what they say

cheers mate...

[rb25]

What has happened id say is that he put the belt back on the opposite way it came off and is not running in the grooves it originally had. You need a new belt in my opinion.

-rb25

[lukits01]

ahh it turns out that the CAS bearings were dead

phew... still had waranty on that

not the tensioner

[RTHRTY3]

is that  noise you heard only apparent when you step off the power ? right near the front of the block ? have a similar thing atm, and would agree, it sounds like a collapsed bearing in the tension adjust idler pully.  Gonna get it looked at tomorow, ill let you know how it turns out....   can you let me know if you find out a price though?

cheers

Phil

Phil did you find out wat it is with yours? And possibly how much to fix it?

Thanx

[JezR31]

This thread is abit old, but i have a similar problem.

The timing belt was changed on my dads rb30 two months ago. Its making a noise aswell but it was silent before the mechanic replaced it.

It sounds like a low whiny noise, now its a consistant noise when the engines idling but it goes away when its being driven.

id like to know how much it would cost to fix aswell, it its the CAS bearings should they be fixed soon?

[Trust33]

This thread is abit old, but i have a similar problem.

The timing belt was changed on my dads rb30 two months ago. Its making a noise aswell but it was silent before the mechanic replaced it.  

It sounds like a low whiny noise, now its a consistant noise when the engines idling but it goes away when its being driven.

id like to know how much it would cost to fix aswell, it its the CAS bearings should they be fixed soon?

I do know that if this pully is not reassembled in the right way that the bearing case rubs and makes a whinning & grinding sound and i suppose not long after that the bearings will be stuffed.Go to tight and the effect also worsens...

[The Dan]

Knew it would be bearings. This happens all the time. The other thing you have to watch out for is when someone is doing the timing belt on your nissan, DON'T EVER LET THEM USE A HARMONIC BALANCER PULLER....EVER. This will crack the internal ring in the balancer and stuff it before you can blink your eyes..

[RTHRTY3]

which one? the idler bearing or the tensioner bearing?

thanx

[Bobjones]

Its your idler bearing on the TIMING BELT not the FAN BELTS per the previous picture, it happended to mine after my engine rebuild as everything was tight to fact specs and the bearing was starting to wear from factory...

Just replace it, it s abugger of a job and you need to remove the radiator etc etc etc

usually it is the passenger side idler, as this has the most force applied to it on start up and aceleration...

[Trust33]

Just trying to state a fact that the idler bearing if not reassembled in the right fashion will rub and die.I dont see a problem in taking the harmonic balancer off whith a claw/puller as it is the only way to safely take one off.If your really worried that it is not coming off easy enuff then give it a tap tap tap as you are trying to take it off.

The skyline is the first car that i have ever changed a belt on by myself.It was a very easy job.The only problem i had with it was that it was annoying to have to take the radiator off just to get at the harmonic balancer with the puller.

Make sure that the bolts (harmonic balancer & the timing belt tensioner) are all torque tensioned.You wouldnt want it working its way loose.

[wrxhoon]

I dont see a problem in taking the harmonic balancer off whith a claw/puller as it is the only way to safely take one off.

You will find the harmonic balancer has 2 x 6 mm holes ( pretty sure they are 6 mm but maybe 5 mm ) and you can use a gear puller utilising the 2 holes . If you use a claw puller you may bent or break it .

[Trust33]

But if the bolt stays in there and you gradually take it out then there is no prob using the gear puller..It even has a little indentation in the bolt to put the eye of the shaft...It's made for it.

[The Dan]

But if the bolt stays in there and you gradually take it out then there is no prob using the gear puller..It even has a little indentation in the bolt to put the eye of the shaft...It's made for it.

That may be so, but if anyone here is actually listening to me then you would have read....crack the INTERNAL ring of the harmonic balancer. Sure you might have gotten away with it this time, maybe not...but it is a fact that 9 out of 10 will crack that ring. You will still get the balancer off most of the time but the ring is only cast steel and only about 1.5 mm thick. The balancer won't be visibly damaged but down the track you will spin it and then it's stuffed.

You can chose to take my advise or not...it's your funeral. I'm only speaking from experience.