21 replies to this topic

[PhilipGCaldwell]

Im researching the 12g940 head now, not starting work on the 202 it till I know for sure whats best. BMC, u got any tips for fitting the 12g940?I have a standard 1989 mini30 engine so i assume it is flat top pistons, how much should i sink the exhausts (do i also need to sink the inlet?) would take it to minisport probably to get it machined properly.Also, if i did go the 940 route, do all the water holes match up to the 998 block?

[Saxo-Fiesta-Mini]

water holes all line up as do the oil galleries only problem is stopping the exhuast valve hitting the block / pistons
you can either sink the valves into the head or get the block pocketed
you then used a 1275 head gasket

[PhilipGCaldwell]

i bought keith calver's mini CD today which apparently covers in detail how to fit a 940 to a 998, so it looks like i will follow the guide and fit the 940, got the 202 on ebay now, probably get my money back for it
just sourcing a 940 now, there arent too many but will bide my time, not paying over the odds for one on ebay

[spennyy2k]

sink the valves 40 thou iirc... i think a 940 head will need skimming too tho to get the correct CR

[bmcecosse]

NO skimming - just sink the exhaust valves by 40 thou. Don't take it to the likes of Minisport - they will charge you a FORTUNE. Mine were done in 5 minutes - using a 45 degree countersink in a pillar drill.

[D1k1m4y]

i think 140 is what it costs to get it all done including blocked channels gasket and fitting and stuff .

if you feel confident do it with the pillar drill, cheaper.

[PhilipGCaldwell]

would this do it bmc, because ive got a decent pillar drill at work
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