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Valve stem oil seals


 
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YOZA



Joined: 07 Mar 2005
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PostPosted: Sat Oct 03, 2020 14:12    Post subject: Valve stem oil seals Reply with quote

Has anyone changed these stem seals on a 4M40 without removing the head ?

If so, what method did you use ?

PS I’m not too interested if your friend at work did it once on a Ford escort, I’m more interested in our finest marque, the L400 limousine.

Thanks.
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PostPosted: Sat Oct 03, 2020 14:12    Post subject: Google Ads keep this community free to join!


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Deker



Joined: 08 Mar 2008
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PostPosted: Thu Oct 08, 2020 21:20    Post subject: Reply with quote

I can tell you the method, if it helps - I have used this method.

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Lewis
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Joined: 25 May 2006
Posts: 16291
Location: Huddersfield

PostPosted: Fri Oct 09, 2020 12:16    Post subject: Reply with quote

Deker wrote:
I can tell you the method, if it helps - I have used this method.


Err.. Derek,

He's already answered that question:-

YOZA wrote:
Has anyone changed these stem seals on a 4M40 without removing the head ?

If so, what method did you use ?

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Deker



Joined: 08 Mar 2008
Posts: 3833
Location: Borehamwood

PostPosted: Fri Oct 09, 2020 19:18    Post subject: Reply with quote

Lewis wrote:
Deker wrote:
A) I can tell you the method, if it helps - I have used this method.

Err.. Derek,

He's already answered that question:-

YOZA wrote:
Has anyone changed these stem seals on a 4M40 without removing the head ?

If so, what method did you use ?

A) Ooops - Who wrote that gobbledegook  Embarassed

I have used a technique in the past. Remove a Spark Plug or Glow Plug, find or make an adaptor to screw fit into the hole.
The adaptor will need a smaller tube fitted to it to accept  rubber hose connected to a compressed air line.

The compressed air will keep the valves closed.

The tricky bit, is to find a position for the piston - valves closed, when compressed air is introduced it does NOT force the piston down.
This is easy on a Manual vehicle, handbrake ON engage top gear, that'll stop the engine rotating.
With an Auto box somewhat more tricky, really need to get TDC very accurately, to stop engine rotating.

A socket on the crank pulley, with a long bar "jammed" against chassis can help.

HTH

Mr D
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YOZA



Joined: 07 Mar 2005
Posts: 2423
Location: The centre of the universe

PostPosted: Sun Oct 11, 2020 21:41    Post subject: Reply with quote

Thanks for the information, thankfully I don't have to do the job, my oil ingestion was not infact my valve stem oil seals, it was my turbo.

I have change it the easy and quick way by using a cartridge which bypasses the need for taking loads of seized exhaust parts off.

All good.
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