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Problem noise sound

BrownieIT
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BK Grand Master

BK

Posted
Posted

If not easy fix like above with the lower cover just being loose or bent, the worst case is another example of the lower timing belt gear and washer sheilds being compressed. When this happens the balancer will indeed touch the cover no matter what as the balancer has moved further inwards. This is usually an RB26 or high revving engine problem though but can still be caused by reusing the timing gear assembly when it should be replaced.

The lower timing gear assembly compressing is precisely why Ross and Nitto developed hardened sheilds / gear that don't compress like the factory stuff.

Dasmbo Collaborator

Dasmbo

Posted
Posted

Use  a long screw drive or something like on and use it a a stethescope and press it on to several different parts of the front covers to determine where the noise is coming from it does sound like some sort of interference of one of the front covers. What condition is your timing belt in hope its not starting to desintergrate as i dont know what condition your engine is in and how many kms it has done for the engine all of a sudden starting to make this noise i would be removing the top cover and inspecting that space and rotating the engine to inspect the belt because if it breaks you will need deep pockets to fix

BK Grand Master

BK

Posted
Posted
20 minutes ago, Dasmbo said:

Use  a long screw drive or something like on and use it a a stethescope and press it on to several different parts of the front covers to determine where the noise is coming from it does sound like some sort of interference of one of the front covers. What condition is your timing belt in hope its not starting to desintergrate as i dont know what condition your engine is in and how many kms it has done for the engine all of a sudden starting to make this noise i would be removing the top cover and inspecting that space and rotating the engine to inspect the belt because if it breaks you will need deep pockets to fix

When was the last time you've actually seen an RB timing belt break ? That said if you don't know the age or condition of the timing belt on your car it should be changed out anyway.

trel Mentor

trel

Posted
Posted

My old 33 did that right before the balancer munched itself and took the engine with it. This relates to too much limiter bashing. :9_innocent: I'd remove the balancer and have a look at your snout. If there's no damage you might be lucky.

BK Grand Master

BK

Posted
Posted
5 hours ago, trel said:

My old 33 did that right before the balancer munched itself and took the engine with it. This relates to too much limiter bashing. :9_innocent: I'd remove the balancer and have a look at your snout. If there's no damage you might be lucky.

Did what, broke a belt or the balancer reducing clearance to cover and hitting issue ?

Regarding breaking balancers I can absolutely relate. I had a stocker balancer destroy itself and take the engine with it too. Wrecked everything - cracked block, cracked crank and damaged pistons.

Dasmbo Collaborator

Dasmbo

Posted
Posted
38 minutes ago, BK said:

When was the last time you've actually seen an RB timing belt break ? That said if you don't know the age or condition of the timing belt on your car it should be changed out anyway.

About 3yrs ago the timing belt shedded on my VK holden RB30/25 reason unknown belt replaced no problems since also have a r33 RB25 and never had any problem with it i mostly answere question in which i have had personal problems with VK i have had for 27 years r33 had for 15 years so i have done a lot of kms with them

tridentt150v Grand Master

tridentt150v

Posted
Posted

If your HB is wobbling at all, its f'ked.  Think about doing a kit job.....if your water pump etc are also 'vintage' then do the whole belt, pump, idler etc at the same time [unless they have only recently been done].  

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