Mixing Up Cylinder Head Parts?

[mxkal]

Hi guys ive got a few spare rb25s sitting around and building up one decent one out of them all. The best cylinder head ive got (27000 kms) has 2 missing cam hats, Would it be alrite if i used some off another head? Would it be better if i got cam journals honed or something?

[TRB-001]

Hi guys ive got a few spare rb25s sitting around and building up one decent one out of them all. The best cylinder head ive got (27000 kms) has 2 missing cam hats, Would it be alrite if i used some off another head? Would it be better if i got cam journals honed or something?

when u say "cam hat", what r u refering to... if your talking about the cam bearing caps then you cannot mix and match, well u can if u get the tunnel rebored.

[mxkal]

yea the caps, im missing I2 and I3. If i use I2 and I3 off another head i would have to get them machined to suit because of the different wear rates yea?

[TRB-001]

becoz of that and becoz each cam tunnel is machined as they a assembled, so if u use 2 caps off another head the clearances will be different and may not even line up properly.

[zebra]

becoz of that and becoz each cam tunnel is machined as they a assembled, so if u use 2 caps off another head the clearances will be different and may not even line up properly.

*Because of that, and because each of the cam caps are machined to suit the specific cylinder head. So if you use two cam caps off another head the clearances will not be right.*

[DVS JEZ]

if the heads off just get the caps to suit, shouldnt cost much

[T04GTR]

line boring isnt cheap.

some are very close some are way out. really depends on your parts. but generaly you cant swap cam caps around. thats why they are all numberd aswell.