Can I put a 2.7 head on a 2.5 block?

[testarosa]

I have a '91 325i coupe that has a worn cam, it runs but I'd rather not have a cam failure to deal with if I can help it.

A friend gave me a 2.7 head, complete. I am wondering if changing the valve springs would be all I needed to do to install it on the 2.5 block. I would use all the other 2.5 parts and ECU.

This is a car for a special young driver, his first, and I want to do it right. I suppose I could put a swap for an 885 in the parts wanted section but a bird in the hand...

Thanks for in advance for any help with this.

[SpecM]

Really doesn't work out

I'm not sure if the valves and pistons would contact, but even if they wouldn't, the car would not run very well

[dashboardmonkey]

to put it simply.....NO!!!

it will not work, the pistons will hit the head

[nando]

for the love of god no. rebuild the head, or drive it until it fails and swap in a new motor.

[e30m20beast]

you can do it if it is a 88 super ETA head but it will not have the same power that you will have with the m20 head and it will probably missfire a lot, for the other heads they sell a spacer (like a really thick head gasket) to put it in between but I don't remember the company that does it.(sorry if I misspell something I am on my PS3 LOL)

[Cabriolet]

No... and the 2.7 sucks compared to the 2.5 head

[testarosa]

thanks one and all, I didn't think it would work just needed to verify.
I will scout around for an 885 head and do it right the first time.
thanks again

[dashboardmonkey]

search next time, this question has been answered about a thousand times

[bimmer_E30]

hai guyss can i put a m10 head on my 2.5 block? srs

[Kershaw]

search next time, this question has been answered about a thousand times

at least you guys dont get cam or timing belt questions on a rotary forum....

thats a facepalm.

[hotballs]

hai guyss can i put a m10 head on my 2.5 block? srs

I believe you can if you saw another one in half and weld it to the side of the complete m10 head.