Hey guys, I'm overhauling my XJ's 4litre and I wanted to know if anyone had the original specs for a 93 4litre. Compression psi, and cylinder bore diameter (I want to double check, to make sure the engine hasn't been bored so I order the right kit). It's a down and dirty quick rebuild. The walls look good and they aren't out of round at all. So I'm just doing a quick hone and rering job. Thanks.
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stock four litre specs.
- Thread starter atowley
- Start date
5-90
NAXJA Forum User
- Location
- Hammerspace
3.875" x 3.413", CR8.8:1
Nominal compression pressure should be about 130psi - but compression values should be taken more as "relative to each other" than "relative to an absolute" when you consider wear.
Look down on a pad by the distributor - if there's a "B" code down there, your cylinders are bored +.010" from the factory...
5-90
Nominal compression pressure should be about 130psi - but compression values should be taken more as "relative to each other" than "relative to an absolute" when you consider wear.
Look down on a pad by the distributor - if there's a "B" code down there, your cylinders are bored +.010" from the factory...
5-90
