My bimmer needs help

[85Ecoupe]

HOW DO YOU TIME A M20?????
just finished rebuilding motor and it will crank but i think it is 180 degrees off timing because the motor will stop cranking (im doing it my hand) at a certain point. and i can go all the way around the opposite direction and it will stop there again.

please help me out

[e30Matt]

Line up crankshaft pulley and block marks.

Line up camshaft pulley and head casting marks.

Install belt. Spin motor two full turns, if all marks line up again you're golden.

[85Ecoupe]

i did that.

[jlevie]

How did you manage that if the engine won't turn thorugh a full revolution?

Double check the cam timing, or better yet get someone else familiar with these engines to do the check to avoid the "same mistake twice syndrome". If the cam timing is correct something is wrong inside the engine. To find it I'd start by pulling the head, rotating the engine and checking each piston's deck height. If those are all correct you have to look to the head for the problem.

[85Ecoupe]

could it be that the engine was not on the compression stroke when i put the head on?

[85Ecoupe]

i still dont know how to adjust timing"p

[strad]

could it be that the engine was not on the compression stroke when i put the head on?

It doesn't matter whether it's compression stroke. The bottom half doesn't care what the top half is doing, as long as the marks line up when you start and after 2 full crank revolutions.

[85Ecoupe]

ok, ive been going over what happened, and i lined the marks up on both the crank and the cam. Next I put the timing belt on. And after the i adjusted the valves. Now while i was adjusting the valves I manually cranked the motor to get each cylinder at TDC. i probably went more than 2 times around. Only after i tried to start the car(which all it did was turn the starter because i unhooked the spark so i could prime the motor) and it stopped turning over. I then took out all of the spark plugs to relieve compression and i tried turning it by hand. It would go about 1 rotation and then stop. I went the opposite direction and it stopped at the same point.


Ok, now what i think happened was i took the metal pin out of the tensioner spring because the timing belt would not go on otherwise(a retarded move on my part i dont need to be flamed, i already flamed myself) I think it popped out and timing jumped. does this sound plausible???

[85Ecoupe]

i just took the head back off....... im screwed...

4 exhaust valves have broken off and 2 pistons are gouged.

oh yeah i know what happened, it jumped timing:s

what should i do now?????? i head conversion, new motor(s14, 302, 350, M50 etc....)

[JasonC]

what should i do now?????? i head conversion, new motor(s14, 302, 350, M50 etc....)

supercharged or turbo 4.3 v6

[E30SPDFRK]

Buy my engine! http://www.r3vlimited.com/board/show...d=1#post879811

[blueapplesoda]

new motor time 1000 hp s38 turbo :-D

but on a more serious note

drop a 3.0l in that mug

[85Ecoupe]

im thinkin bout a mustang 5.0 beast muahahaha...ha


350is anyone?

BTW if anyone has info on this swap i need it :) thanks

[Alex E24 E30]

something is just wrong with crossbreeding

[85Ecoupe]

hey man just think....

amazing body/handling/goodness of the BMW+raw american muscle=pure bliss!