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Rb25 Timing Belt Problem

nickperth

By nickperth,
in General Maintenance

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nickperth

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Posted

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.

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DVS JEZ Grand Master

DVS JEZ

Posted
Posted

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

nickperth Collaborator

nickperth

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  • Author
Posted

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.

post-66618-0-69692100-1354004731_thumb.jpg

post-66618-0-33753100-1354004777_thumb.jpg

post-66618-0-46606800-1354004819_thumb.jpg

post-66618-0-43054100-1354004859_thumb.jpg

post-66618-0-66574200-1354004996_thumb.jpg

post-66618-0-27936600-1354005023_thumb.jpg

post-66618-0-63574500-1354005060_thumb.jpg

doo doo Proficient

doo doo

Posted
Posted

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.

doo doo Proficient

doo doo

Posted
Posted (edited)

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 by doo doo
nickperth Collaborator

nickperth

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Posted

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.

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