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Author Subject: head removal /skimming
bunty99

Newbie

Location: hexham

Registered: 01 Jun 2014

Posts: 14

Status: Offline
Post #1
just after some advice.. im removing my head and I have a dreaded tapper Sad

have bought a uprated head gasket and bolt set off Rich W

my question is do I HAVE to get the head skimmed or is it just good practice to have it done..

car has NEVER over heated and has NOT blown the head gasket so I don't see why I should need to have it skimmed as it wont be warped.. soo unless I don't know something about these heads then I don't see why it must be skimmed

can people shed some light and there opinions on this..

thanks
Posted 2nd Jun 2014 at 21:42
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bigbadbowen

Seasoned Pro

Location: Winchester

Registered: 21 Nov 2003

Posts: 13,753

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Post #2
Assume your getting an engine builder to change the bent valves and guides ?
Posted 2nd Jun 2014 at 22:01
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bunty99

Newbie

Location: hexham

Registered: 01 Jun 2014

Posts: 14

Status: Offline
Post #3
no me and my mechanic friend are. hes done this before in garage with other cars but hes not done a gti6..

only asking as im trying to save money as im nearly 200 in parts alone already and I don't want to spend money on skimming when I don't see why its necessary if the heads not wrapped
Posted 2nd Jun 2014 at 22:22
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cully

Seasoned Pro

Location: Cullompton

Registered: 12 Jun 2013

Posts: 1,093

Status: Offline
Post #4
check its true on a sheet of glass and some fine paste or engineers blue Wink
Posted 2nd Jun 2014 at 22:27
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bigbadbowen

Seasoned Pro

Location: Winchester

Registered: 21 Nov 2003

Posts: 13,753

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Post #5
Good luck with that my advice is to change the valve guides on any bent valves !
Posted 2nd Jun 2014 at 22:35
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bunty99

Newbie

Location: hexham

Registered: 01 Jun 2014

Posts: 14

Status: Offline
Post #6
we are changing the guides aswell borrowing a tool off another mate.. and we just going to take our time and see if we can do it.. im sure we can if we take our time..

and if things go tits up and we foul up.. I will buck up and use the plastic fantastic to pay for a proper rebuild

but as said I reckon we can do it, was just seeing what people opinions were on skimming
Posted 2nd Jun 2014 at 22:53
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fatlapit

Seasoned Pro

Location: STOCKSFIELD

Registered: 02 Nov 2010

Posts: 3,040

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Post #7
Ive got a good head

________________________________________


Posted 2nd Jun 2014 at 22:53
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bigbadbowen

Seasoned Pro

Location: Winchester

Registered: 21 Nov 2003

Posts: 13,753

Status: Offline
Post #8
May get away with not skimming time will tell
Posted 2nd Jun 2014 at 22:57
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bunty99

Newbie

Location: hexham

Registered: 01 Jun 2014

Posts: 14

Status: Offline
Post #9
fatlapit wrote:
Ive got a good head


I will keep that in mind if we screw up lol but hopefully we wont.. buying rest of parts this week and will be doing work next week as im off all week Smile
Posted 2nd Jun 2014 at 23:03
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armzsc6

Seasoned Pro

Location: Crowborough

Registered: 22 Mar 2008

Posts: 3,445

Status: Offline
Post #10
I've done a few heads by fully cleaning them up with wet and dry paper then checking for straightness with a straight edge and feeler gauges. But that was whe doing stuff under warrenty and you could clearly see the place where the gasket had developed a large hole lol.

I have a guy that skims heads for me for £30 if I'm 100% happy there were no cooling issues etc before it came off.

It's best practice to skim a head as even when undoing it from the block it can twist or warp a small amount.

________________________________________

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Posted 3rd Jun 2014 at 07:40
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rich_w

Seasoned Pro

Location: Havant, Hampshire

Registered: 29 Jul 2004

Posts: 5,412

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Post #11
It's a complete bodge not to skim an alloy head - particularly on engines that use an MLS gasket - as these create a mechanical seal by biting into the alloy head.

Get it skimmed! Do it once and do it right.

I can supply a re-conditioned head if need be.

________________________________________

Contact Details:

rich@lynxpowerengineering.co.uk
07732 822546

Posted 3rd Jun 2014 at 09:14
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,838

Status: Offline
Post #12
the gasket doesn't bite into the head, but with an MLS item they do need a good surface prep, a fibre gasket is much more forgiving.

no need to waste £80 on a gasket, they are no better than £40 one from GSF or Peugeot.

with the age of the heads these days corrosion can be a big issue, the depth of skim depends how much is required to give the correct surface finish, however do bear in mind that 0.20 mm is the maximum amount you can take safely, and with a skim of that depth it is wise to use a repair gasket or 1.35 or 1.40mm rather than the 1.2mm standard item.

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 3rd Jun 2014 at 10:25
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oldbrownshoe

Seasoned Pro

Location: Holon Israel

Registered: 08 Aug 2008

Posts: 1,795

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Post #13
Doing it properly is to check :
flatness (using straight edge DIN 874/00 & feeler gauge) head and block,
surface smoothness ( Ra) by profilometer,
and sleeve protrusion
http://www.peugeot206cc.co.uk/repair-206/206/info/gb/b1cd02k3.htm




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Did you mean French military defeats?
Posted 3rd Jun 2014 at 11:21
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,838

Status: Offline
Post #14
no liners in an xu10 engine

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 3rd Jun 2014 at 12:34
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oldbrownshoe

Seasoned Pro

Location: Holon Israel

Registered: 08 Aug 2008

Posts: 1,795

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Post #15
Good, One check less.


BTW it's possible to convert dry liners block to wet ones.

________________________________________

French military victories?
Did you mean French military defeats?
Posted 3rd Jun 2014 at 16:34
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bunty99

Newbie

Location: hexham

Registered: 01 Jun 2014

Posts: 14

Status: Offline
Post #16
well some good news specially for the perfectionists out there I am getting the head skimmed..

one of my mates put me on the one of his friends who works in motor engineering shop and hes guna skim head for 35... supply and fit new valve guides for 10 each... and if I supply the new valves hell just grind seats and fit them for me. so Im looking between £60-100 for work which is a hell of a lot less than I thought it would be so im just guna bite the bullet and get me wallet out and get him to do all work.. and ill just remove and refit the head with all new gaskets.
Posted 4th Jun 2014 at 17:34
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Day666

Seasoned Pro

Location: Bristol

Registered: 20 Apr 2013

Posts: 5,214

Status: Offline
Post #17
bunty99 wrote:
well some good news specially for the perfectionists out there I am getting the head skimmed..

one of my mates put me on the one of his friends who works in motor engineering shop and hes guna skim head for 35... supply and fit new valve guides for 10 each... and if I supply the new valves hell just grind seats and fit them for me. so Im looking between £60-100 for work which is a hell of a lot less than I thought it would be so im just guna bite the bullet and get me wallet out and get him to do all work.. and ill just remove and refit the head with all new gaskets.


Good luck Thumbs up
Posted 4th Jun 2014 at 18:29
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fatlapit

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Location: STOCKSFIELD

Registered: 02 Nov 2010

Posts: 3,040

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Post #18
Where

________________________________________


Posted 4th Jun 2014 at 19:25
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bunty99

Newbie

Location: hexham

Registered: 01 Jun 2014

Posts: 14

Status: Offline
Post #19
fatlapit wrote:
Where


place in Newcastle called Northern Rebore
Posted 4th Jun 2014 at 19:29
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