Enuff

Enuff

Well-Known Member
Happy new year guys and gals..
Can anyone tell me if these are top hat liners in one of my v8 gems blocks, from a 1998 p38 ?
There should be a couple of pics.
IMG_20210104_101616_8.jpg
 
Would I be correct in saying that THL is something of a damage limitation exercise ie it doesn't prevent the original flaw occurring (cracked cylinder block) but simply prevents the liner from moving after the damage has occurred ?
 
norseman said:
Would I be correct in saying that THL is something of a damage limitation exercise ie it doesn't prevent the original flaw occurring (cracked cylinder block) but simply prevents the liner from moving after the damage has occurred ?
Click to expand...
nearly,top hat liners because of the step means the top part of block to liner is sealed so coolant cant seep up between liner and block likewise gasses cant seep down to the crack and pressurise the cooling system, standard liners were originally fitted down to a step so shouldnt move but are not sealed at the top, the bottom doesnt matter as it doesnt suffer the extreme temps the top does
 
Last edited:
Many thanks for the input. Anyone recommend a top hat fitter on the M4 corridor, (near Bath) as I have 3 non thl blocks and I'm too scared to refit one without a thl.
 
jamesmartin said:
nearly,top hat liners because of the step means the top part of block to liner is sealed so coolant cant seep up between liner and block likewise gasses cant seep down to the crack and pressurise the cooling system, standard liners were originally fitted down to a step so shouldnt move but are not sealed at the top, the bottom doesnt matter as it doesnt suffer the extreme temps the top does
Click to expand...

Thank you James, think I'll stick to a 3.5 just the same :rolleyes:
 
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