Measuring 'unknown' Head Height

[MerlinGTI 3]

I have a head here I'm about to get skimmed etc... Thing is I'd like to know how much meat is left on it, its obviously seccy hand and of unknown history. I have a digital vernier and a snow day off work \o/ soooo...

 

I measure from the top of the camshaft to the HG surphace face correct?

Dizzy end or pulley end?

 

What should I be looking at mm wise?

Whats the minium?

 

I have a diagram thing I downloaded from here some time ago, but I think its more xu10 based and tbh I dont really understand it. I would prefer someone to hold my damp girly hand through this process

 

Any other things I should be checking an unknown head for apart from valve strightness that is? it will be pressure tested when off to the machine shop.

 

Many thanks chap-a-roos

Edited December 1, 2010 by MerlinGTI

[DamirGTI 344]

http://s27.photobucket.com/albums/c151/Pie...rrent=19l8v.jpg

 

... this one is for both , XU9 and XU10 8v's ..

 

Damir

[MerlinGTI 3]

Thankyou Damir

 

Ive just measured it and im getting:

 

157.41 mm. Nominal value of an unskim'ed head being 158.931.

 

Clearly this head has had a lot taken off it in the past, what concerns me is it needs another re-face before I can use it.

 

Will it go again?

[DamirGTI 344]

Thankyou Damir

Will it go again?

 

Sure ... usual resurface skim is 0.20mm , or even lower , but 0.20mm is about average for most heads which didn't overheat badly and distort , or something like that ..

 

Damir

[rallysteve 22]

Dont suppose you have the details of where to measure the 16v head height do you please Damir, I have got the measurements from the rebuild manual but no indication of where to measure.

 

Thanks

Steve

[DamirGTI 344]

Dont suppose you have the details of where to measure the 16v head height do you please Damir, I have got the measurements from the rebuild manual but no indication of where to measure.

 

Thanks

Steve

 

.. i'm not sure will have a look in my database ...

 

Damir

[DamirGTI 344]

Yes , i have it .. there you go :

 

 

Damir

 

(a bit poor quality sorry ! my scanner went bust ..)

[rallysteve 22]

Yes , i have it .. there you go :

 

 

Damir

 

(a bit poor quality sorry ! my scanner went bust ..)

 

 

Thanks, thats spot on

 

Steve