I need help please kinda of urgent for me

[assbitbo]

Ok i took my head in to be resurfaced. turns out its warped which is why i took it in the r32 manual only says this

the problem is mine is out of limits it says resurface if it exceeds and replace if its out of limits wtf is the difference? what i want to know since i cant seem to find it anywhere is what is the max i can go to before i have to replace my head like what is the high and the low please if anyone knows let me know i really need this answer id hate to have to sell my car cuz i love it but i need to get this thing fixed so i have a car to drive thanks

[Carl H]

have it decked and call it a day.

[assbitbo]

not clear on that lingo yet :P just have it resurfaced and call it a day? they also said 2 valves are leaking so they suggest i get a valve job done. i mean would it be ok if i was at like .4-5mm? i think i was at like a .35 or some crap

[Carl H]

you may or may not beable to reuse that head...it needs to be decked (resurfaced) and then checked again to see if its back in limit most of the time it usualy is.also if you have the head off its generaly a good idea to have it cleaned and a basic valve job done incase something is worn or broken, prime time to replace stuff.

[assbitbo]

yeah they did a degrease and pressure check on it. they said no cracks or anything just 2 valves leaking. she told me a valve job is 280 for the labor not including any new parts ill need. resurface is 65 degrease was 45 and pressure check was 20 then they had to fix 2 studs for me for another 20. ive been looking more and more in the book and in the rb26dett section it says if it exceeds by an extreme amount then replace it i dont know that much about heads and stuff but i wouldnt think that .2mm over would be extreme by any means. also say they did resurface it and it was within limits again will i have clearnce issues with anything on the block or the valves hitting the block or anything? and yes i have pretty much decided that if valves and stuff are bad i will replace them with better quality stuff. i just really dont want to spend more than like 600 on this head max

[sil_eightyRPS13]

well .35mm is .01378" and most guys with N/A engine will shave their head .030" or so , so u might be safe but check with the FSM...

[Carl H]

if its within limits then go ahead and use the head, no reason not to.fix the leaky valves and be on your way.

[Stealth-Z]

If it is a RB26 head, $600.00 will be reached in no time. After the valve job you will need to adjust the lifter shims. Chances are the valve guides will be out of spec as well.

[assbitbo]

well its an rb20det but no one can find the specs so i was told to use the rb25 info

[Darius]

If your head is warped, there is a good chance that your block surface is irregular as well. As far as the head goes, just get it resurfaced which will flatten it out. But be sure to check the block. If there are any irregularities like tiny pitting or anything like that, a metal head gasket will not work. It will leak and you'll be taking it apart to do it the right way. A metal head gasket needs something next to a mirror finish on each surface to seal properly.

[Stealth-Z]

I looked through all my manuals for the specs on RB20DET head and could not find them either. Looks like you best bet is to go with the RB25DE specs. The RB20DET and RB25DE heads very simular.

You could use a thicker head gasket. That would be a cheap fix. For a thicker headgasket, try asking these guys, http://www.raceeng.com/default.aspx

They carry a large stock of Cometic head gaskets in various thickness's.
Modified by Stealth-Z at 7:45 AM 11/1/2006

[Carl H]

i told the machine shop to use the rb25de specs, motor runs fine...

[Darius]

DUDE! DO NOT USE A COMETIC HEAD GASKET IF BOTH SURFACES ARE NOT MACHINED TO MIRROR FINISHES!

If your head was warped, a metal head gasket is not likely to work unless you have your block decked as well. Especially if you are trying to get a Viton gasket to seal, it needs to be perfect. Get Greddy or Tomei or somebody else that doesn't uses EPDM as a gasket material. A thicker Viton head gasket won't do anything to solve this problem.

My best advice is to use an OEM gasket and pray that it is forgiving enough to get a good seal once you machine your head.

[Stealth-Z]

Darius,You are right about the Cometics. I had a brain fart, thought they were simular to the old FelPro's. Aluminum heads on cast iron blocks tend to warp some. Years ago it was a cheap fix to use thicker FelPro headgaskets.What can I say? When it is your only form of transportation and money was tight, you did whatever necessary to get running.

[assbitbo]

yeah i have the oem rebuild kit i got off ebay from a store in cali. so far every seal or gasket i have needed to replace i have had brand new so thats a good thing :P the block was fine when we checked it but the head wasnt

[Mr HuSTLeR]

How much was all of that? Cause that what happened to my RB25.

[assbitbo]

i paid 262 including shipping for the rebuild kit the head being redone about 500 after taxes since i supplied most of the parts

[Carl H]

sounds bout right for a basic rebuild...