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Author: Subject: Removing a cylinder head from a wet liner engine?
nick205

posted on 2/7/19 at 12:14 PM Reply With Quote
Removing a cylinder head from a wet liner engine?

Has anyone successfully removed and refitted a cylinder head on a wet liner engine without disturbing the liners?

I appreciate once the head is off the liners need to be clamped firmly in place if the engine is going to be rotated.

Your advice and experience would be appreciated

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theconrodkid

posted on 2/7/19 at 01:24 PM Reply With Quote
never had a problem as i have always locked the crank, if the engine is very old or has had low antifreeze % the seal may suffer but thats how long your piece of string is.





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nick205

posted on 2/7/19 at 01:36 PM Reply With Quote
Thanks for your input.

I should have mentioned that whilst disturbed wet liners can have new bottom seals fitted I'm keen to avoid having to do this unless I have to.

With cast iron engine blocks (Pinto) I've just removed the head bolts, dislodged the head and lifted it away. My understanding with a wet liner engine is to remove the head bolts and try and rock the head away from the block to avoid disturbing the wet liners.

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rusty nuts

posted on 2/7/19 at 01:58 PM Reply With Quote
Remove the head bolts then see if you can get the head to rotate around the block to release it before lifting .
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907

posted on 2/7/19 at 03:05 PM Reply With Quote
I had the head off my 907 to change an exhaust valve.

Lotus do different thickness head gaskets so the idea is to use the next size up each time. (I think there are four)

When you run out you then have to replace the bottom seals.





Paul G





Member of the Suttol Owners Club, the MX5 Owners Club and the BMMC

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myke pocock

posted on 2/7/19 at 04:29 PM Reply With Quote
Yes, done it a number of times on my Skoda Estelle trials car. I have pieces of steel bar that are drilled so that a head bolt can go through and they jst touch the liners and hold them in place. This allows you to turn the engine over if required and the liners stay in place of course.
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perksy

posted on 2/7/19 at 08:55 PM Reply With Quote
What engine are you taking the head off ?


Lock the crank in position if poss and don't rotate anything
You'll already know about using a straight edge and feelers to check the liner height

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nick205

posted on 3/7/19 at 10:16 AM Reply With Quote
quote:
Originally posted by myke pocock
Yes, done it a number of times on my Skoda Estelle trials car. I have pieces of steel bar that are drilled so that a head bolt can go through and they jst touch the liners and hold them in place. This allows you to turn the engine over if required and the liners stay in place of course.



I have the same thing in mind to hold the liners in place once the head's removed.

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nick205

posted on 3/7/19 at 10:18 AM Reply With Quote
quote:
Originally posted by perksy
What engine are you taking the head off ?


Lock the crank in position if poss and don't rotate anything
You'll already know about using a straight edge and feelers to check the liner height



Peugeot 205 GTI 1.9 (XU all alloy engine that has wet liners).

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perksy

posted on 3/7/19 at 08:40 PM Reply With Quote
Iirc these have 'paper' gaskets at the bottom of the liners?


Remember speaking to a mechanic at the local Peugeot dealer and he reckoned it was quicker for them to pull the engine and do a 205 GTI headgasket replacement on the engine stand rather than do it in the car ?

Not sure about that, but I remember losing some skin doing a timing belt on one of these in the car

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Camber Dave

posted on 4/7/19 at 07:47 AM Reply With Quote
One of the cars I worked on, Lotus Europa/Renault or Elite/907 you had to retain one of the centre head bolts
and rotate the head to break the gasket seal rather than lifting/rocking it to avoid the liners moving.

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rusty nuts

posted on 4/7/19 at 11:07 AM Reply With Quote
Canít remember which Peugeot engine it was but a lad I worked with did a head gasket on it and found out on reassembling one of the head bolts is shorter than the others, when he tightened the bolts one broke through the block . Make sure you make a note or keep them in order.
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nick205

posted on 4/7/19 at 11:32 AM Reply With Quote
quote:
Originally posted by perksy
Iirc these have 'paper' gaskets at the bottom of the liners?


Remember speaking to a mechanic at the local Peugeot dealer and he reckoned it was quicker for them to pull the engine and do a 205 GTI headgasket replacement on the engine stand rather than do it in the car ?

Not sure about that, but I remember losing some skin doing a timing belt on one of these in the car



I believe earlier ones have paper liner gaskets and later ones have rubber O ring seals.

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