im a mechanic to trade ,got 300zx as a toy for myself,too much of miser to buy a manual for the car!

went on line looked up the limmit on skimming the heads and it said it was 0.2mm.this is a very low limmit.can anybody help here?..... the head away right now getting done right now if he can. :bow:

btt

As a mechanic you should know you have very little playroom with heads of most V6 engines ?

 

the limit is indeed 0.2 mm and if you need to skim 0.1mm of 1 head, make sure you do it to the other head as well (even if it doesn't need it)

 

if the head(s) is over this 0.2mm limit you can basically bin it.

 

-Eric

it must be a jap thing m8, and both heads are getting skimmed dont do half jobs.you didnt get this info off (http://www.300zx-twinturbo.com/cgi-bin/manual.cgi?list=em&dir=&config=&refresh=&direction=forward&scale=0&cycle=off&slide=1&design=default&total=70)

The link is the electronic version of the 1990 service manual.

 

I have 6 Nissan 300ZX service manuals (from 1990-1995) and in all manuals it says that if the block doesn't need resurfacing, the max. limit for the heads is 0.2mm

 

eg. attached is the same section taken from a 1995 manual

 

Theoratically you should be able to go beyond the 0.2mm limit using (thicker) metal headgaskets, but I never tried it myself.

thats what im looking for cheers m8,,,,,,double head gasket if you are selling it on........lol