Rb26 Head

[blitzxtr]

Just a question guys my car R32 GTR is being build at the moment they started it & was running fine had a bit of run in time then now its making noise in the head somewhere they havent told me much but they said 1 shim has a couple of marks on it but they havent come 2 a conclusion as yet any1 shed some light.

Tomei cams 280s by 10.5mm intake & exhaust

Tomei buckets & retainers Prep pro valves from Hi octane as for the shims god only knows where they come apparently clearances are fine.

[tacker]

yer the clearences are very time consuming to get right i am told, i am sure they will locate the problem when they start looking into it.

My self i am not looking forward to the new cams and valve grind currently being carried out, as clearences are going to be all over the place.

[GeeTR]

God damm, 280's and a Z! Thats a tough setup man

[giant]

if they know what there doing, and take their time all the shims can be one size

in all our gtr engines the shims are excactly the same size and quiet as a mouse, ( i learnt the hard way after going to the so called "experts")

[Swiper the Fox]

common mistake is the cam base circle to bucket clearance is 3thou different on a STD GTR head due to the fact the exhaust valves are sodium filled. When fitting aftermarket stainless valves this clearance is not used as when the stainless valve "grows" under heat the cam base circle to bucket clearance is insufficient to ensure correct operation.

This has been explained by me to your engine builder and is still arrogantly being ignored. A quick check can be done when the engines hot by measuring the inlet side to make sure the exhaust buckets are clearanced the same.

[blitzxtr]

common mistake is the cam base circle to bucket clearance is 3thou different on a STD GTR head due to the fact the exhaust valves are sodium filled. When fitting aftermarket stainless valves this clearance is not used as when the stainless valve "grows" under heat the cam base circle to bucket clearance is insufficient to ensure correct operation.

This has been explained by me to your engine builder and is still arrogantly being ignored. A quick check can be done when the engines hot by measuring the inlet side to make sure the exhaust buckets are clearanced the same.

Thats what i was going 2 say paul that you spoke to them but have they listened no. makes me wonder if they listen from experts that have come across these problems before. There apparently getting the bloke that did the head for a cylinder leakage test & diagnose the problem. Maybe faulty part in head god only knows hopefully they figure it out.

[Blitz]

Thats what i was going 2 say paul that you spoke to them but have they listened no. makes me wonder if they listen from experts that have come across these problems before. There apparently getting the bloke that did the head for a cylinder leakage test & diagnose the problem. Maybe faulty part in head god only knows hopefully they figure it out.

My money is on the head not being correctly setup for the hardware used, not a faulty part.

[Swiper the Fox]

My money is on the head not being correctly setup for the hardware used, not a faulty part.

Now they are taking the head off...farken ell !!

[Blitz]

Now they are taking the head off...farken ell !!

Ouch, that'll be costly.

[Swiper the Fox]

Ouch, that'll be costly.

already over $20 000 just in labour costs

i think a new labour cost record in street GTR engine removal/rebuild/re-install has been smashed.

[giant]

holy hell

[giant]

unless it's warranty work (free work )

pull out and give it to someone else! otherwise the hole will just get deeper

Edited March 10, 2008 by giant

[Swiper the Fox]

holy hell

ive personally seen the bill...over 9 hours to fit a front diff in sump. We did mine IN the car in under 2 hrs, out of the car its a 1 hour job. 3 hours was charged to clean/degrease sump, baffle plates and oil filter block. Car has the same Hypertune plenumn as your car Russ, was yours a direct fit?, as he was also charged for modifying it and other parts to make it fit...go figure?

[NYTSKY]

already over $20 000 just in labour costs

i think a new labour cost record in street GTR engine removal/rebuild/re-install has been smashed.

(Faints)Thats nearly double my rebuild.

This would have to be another mental GTR??

[giant]

wow 9 hours! lol

if that was just a straight swap out thats is an absolute joke

the hypertune plenums are a bit harder as the studs need modify from memory as they are too long for the plenum flange, piece cake if the engine is out though, bitch in the car.

hope it gets better for you soon , as it must be pretty damn anoyying especially if you spend good money and you are seeing issues.

[FineLine]

You seriously need to find a new workshop. I had my 25 head converted to run solid lifters aka rb26 with 9.1 lift and theres a lot more dicking around involved in that. It still took my head man way less time than what yours did though.

[dead32]

$20k just in labour w0w!.... who's taking that long? steady eddie?

[Swiper the Fox]

not my car, one of my friends. I do most of my own work/engines.

Except our latest engine which was exceptionally built by Croydon racing.

[tacker]

my whole car aint worth that much!!!

And russ ya scaring me with the shims stories

[hungry6]

It seem some shops out there are still learning the ins and out of a 20 Y.O. engine. and they also have seem to charge a premium because it's a GTAHHHH !!!! FFS it's a motor, made of steel and alloy, it's not exactly rocket science...