FML Seized M50

[TimKninja]

SO I just wired my car up, 85 ETA, 93 M50TU out of a 525i.

Had to replace starter, put new so starter in. all im getting is the Thud from the solonoid. Im thinking I have a bad starter. SO I for shits and giggles try to turn the motor by hand.

Wont turn with normal 22mm Wrench...okay Try a bigger wrench
It wont fucking turn with a 3/4 Ratchet .

Take out all the spark plugs, found out that when I let my friend do my valve cover gasket he left out one of the inner nuts...So Cylinder number 6 spark plug is submerged in oil.

In some twisted fatefull act, i was spraying PB Blaster into the cylinders to see ...AND THE FUCKING NOZZLE BROKE OFF AND DROPPED INTO THE CYLINDER.

FUCK.

So...I guess im asking, is their anyway to unseize my engine. It was turning a few weeks ago when i was putting my driveshaft in. Im 99% positive it was. an then ive been working on it in my free time (GO to school, Work two jobs) . So ive been working on it while I can. Ive pulled the intake mani to get at the starter. ANd I noticed some buildup above the valves, so i sprayed them down from the intake port, this wouldnt cause premature rusting of the cylinders?

And then while the intake mani was off and i was getting a new starter I let the car sit for two days til I got free time again, with the hood closed, intake manifold off and rags in Cylinders 1,2,5 and 6. Theres no way it coulda got wet in there?

My clutch isint bled right now, theres no possibility thats related.right?

Could a driveline misalignment cause the engine not to spin?

Theres no way of not pulling the head to get that cap out, is there? I cant leave that in their, can I?

Fuck This is terrible. I really need help. ive dumped all mty money into this thing only for this to happen.

[cabriodster87]

The only thing that comes to mind is something pinching/binding on the flywheel, and maybe some well placed compressed air will expel that nasty little cap, but that's the least of your problem. Let us know how it goes.

[Mr.SWISS]

Yea that plastic cap is not going to seize and likely will get mauled and burned to a crisp on it's exhaust gaseous exit. You could be getting hydra locked by the oil filled cylinder. Also what clutch and fly are you using? Has this engine ran in the E30 before or is this the first crank you discovered all this?

[TimKninja]

I removed all the plugs , so I dont think I'm getting hydrolocked, this is my first attempt to crank it.I had to switch out from the m50 starter to the m20 one. The m50 doesn't mesh . Im using a single mass M20 flywheel from an 85 eta, and clutch and a getrag 260 from an 88 325i.

So you dont think the cap needs to come out?

[scottinAZ]

you DID shave the back of the M20 flywheel didnt you????

If not, you are binding on the two rearmost oil pan bolts, and the back of the flywheel. common problem.

[TimKninja]

No I didn't. Ive only heard this is required with some people's swaps. I swear it was turning before when i was putting the driveshaft in. If I remove these oil pan bolts , would it theoretically spin? As a process of elimination thing. Now if it does spin after that I suppose the engine and tranny are coming back out to fix that . And you say it will bind, but I cant even get my crank to move at ALL.

[gkobez]

How long, and where was this engine sitting? Before you got it and while you have had it?

[Hey_You]

So you had tried turning it over the first time, but think the engine was turning when you put the driveshaft in? Was your trans in neutral? That's my guess. Also, do as these people say and shave your flywheel. There MUST be a reason why they suggest doing that

[scottinAZ]

first off, with the G260 you cannot get to the bolts in question with the trans in place :( Second, they are a long bolt with a cast in boss that is part of the pan, this is why it hits, it isnt just the bolt, its the pan as well. third, yes, it can lock the motor tighter than a bulls ass due to the interference.

[KenC]

The cap will most likely disintegrate upon the first combustion cycle.

Sounds like your flywheel is binding.

Are you 100% sure it's timed correctly?

[Mr.SWISS]

first off, with the G260 you cannot get to the bolts in question with the trans in place :( Second, they are a long bolt with a cast in boss that is part of the pan, this is why it hits, it isnt just the bolt, its the pan as well. third, yes, it can lock the motor tighter than a bulls ass due to the interference.

And there is the problem and why if you run a 260, you deal with the extra bullshit. Shave back of pan and or flywheel, get custom trans mount and shifter setup, deal with only 4 big bolts holding it all together...... :crazy:

Or 240,250, and ZF fit fine and go all nice and simple.

[TimKninja]

The motor was purchased off of a fellow r3vlimited
Member out of a working car. He removed it and I purchased it a few days later. It then sat at my friends shop for about a month on an engine stand while I gathered swap materials . I then took the old engine out and mated it up to the tranny and dropped it back in the same day. A week later I connected the driveshaft and shifter. And I remember it spinning while I was tightening the driveshaft bolts while it was in gear.

Then a week or so later I towed it home to do the wiring. It has been sitting here for about a month maybe, we have had rain but the hood has been on.

I did have the intake manifold off for a breof period of time when I was replacing the starter. And it rained . But the hood was on and closed tight.

I Dont really see how water could of entered the cylinders . I sprayed some liquid wrench into the cylinders the morning. I'll let it soak and see if it did anything after work .


EDIT: just read everyone's post . Seems as tho I'm yanking the engine back out. Why is it that only some people have this problem and others don't? But this is the only thing that makes sense. Is my flywheel gonna be warped? I'll bring it to a machine shop anyways and check.

[scottinAZ]

the flywheel is thick enough that warpage should not be an issue. besides when they are shaving it down, have them deck it for a fresh surface on the clutch.

[KenC]

You sprayed solvent into the cylinders!?!? The pistons aren't seized to the walls. Put some oil in there and back away from it before you do some real damage.

[Mr.SWISS]

I think your IIRC is broken. I bet the last time you felt it rotate was on the stand. Once the flywheel is bolted it may have moved a small dgree where there isn't bind, but no doubt less than 15* of travel.