Head saver shim

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htr

htr

Well-Known Member
Posts
1,557
Location
Central Otago, Southern New Zealand
Question: When fitting the MLS HG to a K series 1.8 motor do you need to fit the head saver shim that comes with the kit? The kit instructions indicate so.

I have and don't see it as a problem normally. However, on my last project I had the valves unshrouded which would have lowered the comp' ratio as it added a small void into each cylinder. The head was skimmed which would have raised the comp' ratio again. Under normal circumstances the head skim with the head saver shim helps to correct any discrepancy. But with my project have I effectively lowered the comp ratio again?
 
zefrench said:
I would post this on this forum. This guy has done quite a few 1.8 head gasket jobs. His posts are very insightful.


K-engine project - A possible low cost rebuild? - The 75 and ZT Owners Club Forums
Click to expand...

Thank you! that was a very interesting read. I'm carefully considering using an elastopolymer gasket as suggested by many. I'll have the head off in the morning here and will have a very close look at the liner heights. If I do go for the original type gasket I'm guessing that st'd H/bolts will be sufficient?
 
Last edited:
htr said:
Thank you! that was a very interesting read. I'm carefully considering using an elastopolymer gasket as suggested by many. I'll have the head off in the morning here and will have a very close look at the liner heights. If I do go for the original type gasket I'm guessing that st'd H/bolts will be sufficient?
Click to expand...

If you are going to fit the MLS gasket, the shim is a must.
If you are going to fit the elastopolimer gasket, standard head bolts are all that is required. You must fit the steel dowels though.
All liners can be flush up to around 4 thou. The elastopolimer gasket is less fussy and can accommodate varying liner hights as long as they are within the measurements i've listed above.
 
Last edited:
I've ordered the later BW750 elastopolimer gasket and st'd h' bolts. I believe that 3 liners are flush or close to it and the last one by the cam belt I can slip my 0.0015 feeler gauge between the steel ruler and head face.
 
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