HEAD GASKET
Moderator: martauto
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Tot
- E30 Zone Newbie

- Posts: 11
- Joined: Mon Feb 05, 2018 11:00 pm
recently did a head skim as my alternator belt slipped off the pulleys,should i use oversize gasket or just standard one
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martauto
- E30 Zone Team Member

- Posts: 6207
- Joined: Wed Aug 31, 2005 11:00 pm
- Location: leeds
Some body in the know will be along soon until then have a look around and post up some pics if you like.
Welcome to the zone mate
Mart.
Welcome to the zone mate
Mart.
Only the E46 cab left now.
Just got too old.
Just got too old.
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paultv
- E30 Zone Squatter

- Posts: 1545
- Joined: Mon Apr 21, 2014 11:00 pm
- Location: Auf dem Schnee: Germany
Hi Mate,
Well, normally you would measure the height of the head to check if it has been skimmed before, should be 125.1 mm.
If the skim removes the maximum allowed of 0.3 mm ( 12 thou inch ) of metal, then a 0.3 mm over sized gasket is available. Any more
skimming will affect the compression / valve clearances from the pistons, and cause lousy running as well.
At least, that's the theory, so check the tolerances and skim info with your machine shop.
Paul
Well, normally you would measure the height of the head to check if it has been skimmed before, should be 125.1 mm.
If the skim removes the maximum allowed of 0.3 mm ( 12 thou inch ) of metal, then a 0.3 mm over sized gasket is available. Any more
skimming will affect the compression / valve clearances from the pistons, and cause lousy running as well.
At least, that's the theory, so check the tolerances and skim info with your machine shop.
Paul
4th May 1990 325i Convertible.
BMW E30 Cabriolet Best Mod Ever:
https://bmwe30cabriolet-wdm.blogspot.com/
BMW E30 Cabriolet Best Mod Ever:
https://bmwe30cabriolet-wdm.blogspot.com/
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Tot
- E30 Zone Newbie

- Posts: 11
- Joined: Mon Feb 05, 2018 11:00 pm
thanx Paul,greatly appreciated.wl check with shop
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BenHar
- E30 Zone Addict

- Posts: 3081
- Joined: Sun Jul 11, 2010 11:00 pm
- Location: Reigate, Surrey
Why did you skim the head?
Alternator belt slipping would not normally require this?
Ben
Alternator belt slipping would not normally require this?
Ben
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Tot
- E30 Zone Newbie

- Posts: 11
- Joined: Mon Feb 05, 2018 11:00 pm
well it had overheated for a while while cruising on the high way without noticing and was producing a white smoke so sm advice was that its usually js better of skimming the head
