I'm taken my 320i into the mechanics this week to let it grow up, and gain an extra 700cc. (using the original 731 head).
I've got all the parts (I think), have read HEAPS on the net (sometimes not a good thing, getting contradicting stories), but as I have limited mechanical experience I'm just after a bit of final advice.
What got you caught out when you did yours?
Unforeseen problems?
Thanks
Antony.
Yip, a 2.7 question.
Moderator: martauto
Reppin' NZ e30's.
If your doing a complete strip and rebuild of the doner bottom end, the front crank nut will give you gip! there held on by 480nm and with the bottom end out of the car it's a cow to do (normal thread - anti clock to remove).
The way i got round it was to use 2x 3" bolts into the rear of the crank with a pry bar through them to stop the crank turning, brake bar on the front nut attached to a 22mm socket and then one of the legs from my engine crane to add leverage to the brake bar. Make sure you've also got a heavy lump of a friend to sit on the engine as it will want to flip it's self under force.
Also, heat on the nut will aid the removal.
The only other prob you may encounter is valve clearance on the piston face - use something like children's playdoh as thin as you can get it and apply it to the inlet+outlet points of the piston face then, dry fit the head + bottom end together using old head bolts and an old gasket, rotate the engine slowly via the front crank nut a couple of times. Finally, take it all apart again and check for indentations in the playdoh.
It's also not uncommon for a minor bit of valve slap because your taking about a very small thou clearance.
Purchase the fatest gasket you can get, iirc BMW do a 2.8mm gasket.
The way i got round it was to use 2x 3" bolts into the rear of the crank with a pry bar through them to stop the crank turning, brake bar on the front nut attached to a 22mm socket and then one of the legs from my engine crane to add leverage to the brake bar. Make sure you've also got a heavy lump of a friend to sit on the engine as it will want to flip it's self under force.
Also, heat on the nut will aid the removal.
The only other prob you may encounter is valve clearance on the piston face - use something like children's playdoh as thin as you can get it and apply it to the inlet+outlet points of the piston face then, dry fit the head + bottom end together using old head bolts and an old gasket, rotate the engine slowly via the front crank nut a couple of times. Finally, take it all apart again and check for indentations in the playdoh.
It's also not uncommon for a minor bit of valve slap because your taking about a very small thou clearance.
Purchase the fatest gasket you can get, iirc BMW do a 2.8mm gasket.
"I F**KING LOVE YOU GUMBO"
Thanks.
Reppin' NZ e30's.