Rb25 Timing Belt Problem

[nickperth]

Hey hows it going, ive got issues with my new timing belt which ive put on my rb25 33 skyline

I have an issue as were when i do a few turn overs the engine my timing belt starts to slide off from the cams off my car. I want to know if this is normal, at first i thought it might be due to the new idle bearing and tensioner pulley however i reused the new one and it caused the same problem, now ive torqued up the tensioner fine however i noticed the idle bearing and tensioner arnt exactly alligned as i mean the idler is more pushed in closer to then engine and the tensioner is a bit more out from the engine, which im thinking it could be the cause off it moving.

i want to know what could possibly causing it to slip off the cam gears or is that normal, cause i have made sure all the nuts and washers are there, and there is no missing washers which could be causing this. however i did notice when i took off my original timing belt the idle bearing was scured with only a few threads, cause currently the idler is secured all the way in.

I got a video off the timing belt slipping off. I have made sure as well that all the timing marks are lined up and there 100% on.

[DVS JEZ]

Without reading the whole thing. This happens if u miss out a washer the idler pulley. Or accidentally added a washer to the idler pulley.

Check the alignment if the idler and tensioners. Adjust as required

[kitto]

Probably missing the front timing gear thrust plate.

[jiffo]

Pull it down again.

Check carefully that you haven't got the tensioner spring caught between the tensioner and the block causing the tensioner to sit cocked over.

[nickperth]

Hey hows it going, i pulled down the pulleys and checked it all over again and im 100% sure that ive lined it up exactly as the r33 engine manual says and have made sure all the washers are there with the diagram showing each part.

However i have taken a photo of the pulleys and theres possibly one reason why its off mark i believe its the tensioner and its a bit unalinged and i noticed the idler bearing is a bit more in towards the block and the tensioner is a bit more out is this normal?

I just want to know if you guys see anything wrong in these photos, it would be greatly appreciated.

[doo doo]

Tensioner looks like it's at an angle (no it shouldn't be) - It looks like the tensioner stud is bent (have you replaced it?)- either that or the tang for the spring is caught in between tensioner and block like jiffo mentioned, though now i don't think so as it would only looked cock when you did it up. Put a photo up of the the tensioner stud (without the tensioner on it) relative to the idler pulley.

[nickperth]

Alright then, ill have a look at it today after work

[nickperth]

Btw i havent replaced the stud

[DVS JEZ]

I think the idler needs the washer to space it out?

[doo doo]

Btw i havent replaced the stud

My guess is that you're going to need to, get oem nissan. I wouldn't think you need a washer to space the idler out though, it looks to me like the angle on the tensioner is what's pushing the belt off

Edited November 28, 2012 by doo doo

[t_revz]

Btw i havent replaced the stud

Kudos sell studs/bolts/washers/nut in a kit for tensioner and idler.

[kitto]

Idler does not get spaced out.

[nickperth]

Well ive fixed the issue with the misallignhment turns out one of the washers was the wrong one, and for just in case i replaced the engine stud and the the belt lines up quite nicely.

However i do have another issue unfortunetly, one of the drive belts the one that runs the alternator, got containmainted with coolant which i believe it is squeaking quite a high pitched sound, however i decieded to clean it and i used the wrong stuff for it which was break cleaner which i know shouldnt of, and i should of used warm water and soap. However i decieded to buy a new belt and got a dyco one for $15 i installed it yesterday and now it makes the same squeak, is there a chance i possibly contamiainted the pulleys as well cause when i was spraying i sprayed on the pulleys as well.

I want to know if i take out the radiator and everything and i wash down the pulleys and with warm water and soap should this get rid of the contaiminaton and stop the squeaking.

Because i know that its the altenator/water pump belt as when i loosen tension on the belt, the high pitched squeaking stops and goes away, however the battery light comes on indicating the alternator is providing poor current and power supply.

[mad082]

Try tightening it a bit more and see if it stops squealing. Also try spinning the alternator and water pump by hand to make sure one of them isn't siezed