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[griff2494]

hi there

do you mean i need a better one? ie electronic ? im sure no one could have skimmed 7 mm off it surly if they had the engine would not have worked???

do you no if theres a min marker on the head some where???
cheers for your help mate ,this is worring me now lol

cheers
griff

[Andy B]

hi there

do you mean i need a better one? ie electronic ? im sure no one could have skimmed 7 mm off it surly if they had the engine would not have worked???

do you no if theres a min marker on the head some where???
cheers for your help mate ,this is worring me now lol

cheers
griff

  you're using a vernier, often referred to as a very-near because the reading is open to interpretation. A micrometer looks like ....

and is considered more accurate.
I'd say it was impossible for 7mm to have been machined from your cylinder head. Either the 134mm quoted isn't right or you're reading your vernier wrong!  hence me asking for a picture without the flash 

Min marker? I've never ever looked for a min marker but doubt there is one only because the difference between a new head & a min thickness head is only usually a fag packet thickness, so the marker would be as wide as the maximum you're allowed to skim from it.

[tidla]

never used one.. but the reading of 126-7 looks like from the edde(right hand side of the piccy) :-/

[Andy B]

never used one.. but the reading of 126-7 looks like from the edde(right hand side of the piccy) :-/

None of mine have a window on them and you line a zero mark up on the sliding bit with the graduations of the fixed scale. Either that or the easy way of a digital vernier ......, especially as your arms get shorter! 

[griff2494]

CHEERS FOR THE REPLY
ive tried to take pics with and without a flash both are hard to see but this seems best


im reading it 127mm at the edge enless im reading it wrong? first time ive ever used it lol

[Kevin Wood]

Hmm. I wonder what's been going on there?

My guess :

1) The 134mm spec is wrong.

or

2) The head may have been replaced by a refurbed one. They may have also skimmed the top face and then line-bored the camshaft journals so the 7mm has not come off the gasket face. Even still, 7mm seems a lot.

Maybe someone else has a z22xe head they could measure?

Nonetheless, this one is known to run Ok without valves meeting pistons, so it will do so again.

Skimming isn't by any means essential when changing a gasket. OK, this one has clearly been worked on and failed a second time, so it would merit a close look at the head for any imperfections, especially around the fire ring areas, and inspection for any warping. It looks to be good in the photos but they don't tell the whole story.

If the head and block faces appear flat and smooth I would put it together with a new gasket without skimming and see how it goes, TBH.

Kevin

[Andy B]

....
im reading it 127mm at the edge enless im reading it wrong? first time ive ever used it lol

have you got a zero mark on your scale inside the window? I take it scale reads from zero to 25 or 5010 (I'm getting mixed up with a metric & imp micrometer thimble )  :-/
If you have, that's what you're lining up with against the fixed scale.

Have you got a normal rule you can use? You'll be able to measure within 1/2mm with that, certainly within 7mm 

[Andy B]

have a read of this. 

http://www.tresnainstrument.com/how_to_read_a_vernier_caliper.html

[griff2494]

now im pissed off!!! made myself look stupid!!!!

think i will just throw this measuring thing in the bin!!!!!!
heres why if you look below you can see on the pic that when set to 0 the jaws are miles apart total waste on money!!!!!!!


god do i feel silly now!!!!!!!!!!

[Andy B]

now im pissed off!!! made myself look stupid!!!!

think i will just throw this measuring thing in the bin!!!!!!
heres why if you look below you can see on the pic that when set to 0 the jaws are miles apart total waste on money!!!!!!!


god do i feel silly now!!!!!!!!!!

You're reading it wrong. When the jaws are closed the zero on the fixed scale will line up with the zero inside the window. 

[Andy H]

Is there a scale on the little plate held by two screws in the window on your vernier?

Did the link Andy B posted help any?

[griff2494]

cheers andy b

now i feel even more silly!!!!!! after wot you put i reread and guess what

yep you guest it 134mm !!!!!! DOH!!!!!!

[Welung666]

Right, clean the vernier faces and close it fully. Put a pencil mark on the bottom edge of the window against the 0 and re-measure the head

[edit]to add - too late, you already did it [/edit]

[Andy B]

cheers andy b

now i feel even more silly!!!!!! after wot you put i reread and guess what

yep you guest it 134mm !!!!!! DOH!!!!!!

Result! A vernier isn't the easiest of things to read at the best of times hence - a very near - and then when you get older & you know how to read it but can't see to read it without specs.

At least you're sorted now & have learned another skill! 

[Kevin Wood]

Good news, then. Your engine head hasn't been ground down to nothing and you've learnt to use your vernier.

 

Kevin