head

Wed Jan 28, 2009 1:25 am

i have just bought a m20 2.5 engine and it has an 'ANC' stamp on the head.can someone tell me what this means?

Wed Jan 28, 2009 1:49 am

Spanish aftermarket casting possibly

Wed Jan 28, 2009 1:58 am

It actully says "AMC" I think.

It is a replacement head, i.e not bmw. Having said that they are good quality casting, the ports are not finished quite as well as the bmw, but otherwise they are on a par, except for one thing. They don't crack like the bmw one

which is a huge peace of mind.

Its funny you mention it as I have just rebuilt one today!! It will be up for sale tomorrow if anyone would like it.

cheers maggs

Wed Jan 28, 2009 8:22 am

The one I got from corry racing was amc. has stronger journals and stronger wider water way's. Corry's did sort the roughness of the casting out before it was in my hands though

.

Wed Jan 28, 2009 9:25 am

thanks for the info so far.the guy i bought the engine from says it it 2.5 ported to 2.7 is there anyway in finding this out?

Wed Jan 28, 2009 9:50 am

Mesuering the stroke of the piston from tdc down. Someone will post up the throw for you i'm sure.

Wed Jan 28, 2009 10:31 am

If you have the engine out of the car the best bet would be to take the sump off and have a look at the crank.

If it is a 2.7, the crank will be stamped with "HUB 81" somewhere. I cant quite remember where but I'm sure it on one of the counter weights.

Thid means the crank has a stroke of 81mm, instead of 75mm. These cranks come from either the e28 525e engine, or a diesel engine the m21, from the 5/324td

the other way to check would be look inside the ECU if you have it, it will have a different chip in it, but this is less conclusive than taking the sump off.

Good luck, hope youve got a 2.7

Thu Jan 29, 2009 1:49 am

thanks maggs i sure hope i have one too.really looking forward to to converting from my m40 1.8 to this '2.7'