Checking Shim/clearance On A Rb26 Head Help

[James_03]

Hey guys,

I have a "noisy" rb26 head. I bought it reconditioned off another guy with camtech cams in it. It was still in the bubble wrap from the head reconditioners when I got it. Since then the motor is finished and running very well and making good power, but it still needs to be looked at as I can't leave it like it is, it's not excessive noise, but definately louder than your average rb26 with noisy injectors clicking away

I understand a feeler gauge is used to check between the lifter and cam for excess clearance yes?

Can someone give me a very brief run down on what I have to do in order too check them? I understand the cams might have to come out and back in a few times, I am cool with all that.

Cheers for any help.

[James_03]

All good, I dug up the r32 gtr workshop manual and it's all in there. Must learn to rtfw before posting.

Any pointers that might make life easier for me but, do tell. It looks like that actually use 2 feeler gauges to check it in the manual..

[DVS JEZ]

Yes measure the clearance with the lobes pointing up. Write down each measurement and double check them.

Very slow process.

Once u then remove the cams and buckets u need to measure the current shim thickness then add the measurement taken, then remove the required clearance from that total.

What does the workshop manual say as required clearance?

[James_03]

Thanks for the DVS.

Attached is clearances as per manual. Would I be right to just follow this?

Edited August 9, 2012 by James_03

[DVS JEZ]

Yes follow the manual specs

[EdGTR]

double check your feeler gauges before you start especially if you are going to do as they say and use 2 to get the measurement right, I started doing it this way and gave up and just used the one bent one. I used Precision shims down in vic ( from memory) for the new ones. If doing the job again on a head still on a engine i would probably consider installing a cam stud kit. You will see why.