engine seized!
Turbo Mini Forums

hi
i rebuilt my 1293 turbo engine abit ago have had it on the road bout 2 weeks n done bout 150 miles. never had low oil level or pressure and neva overheated bbut on my way to back to work after dinner it stopped dead! on closer inspection the flywheel bolt had undone its self n looked up after sorting this problem it fired up. then once everything was put back together n it was back on the deck i went to start it up and it fired then cut out. tried starting it again n it has sezied again. so once again i stripped it down to find no fault with the clutch or flywheel but the engine wont turn, its sezied solid. i cant get my head round why this would of happened because its been fine. any suggestions why this could of happened or somethink else that could be wrong causing the engine to lock up?
thanks jole

Try turning it over without any spark plugs in, fuel could have flooded one cylinder. Ive had this happen.

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


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There are an awful lot of letters missing in the (initial) post making it very difficult to read and understand but, if I've translated it correctly, you say it stopped dead the first time, ie, before you found the flywheel bolt loose.

In which case the siezure may have nothing to do with the flywheel bolt.

However, the fact you say the flywheel bolt was loose, really points to the engine not having been put back together very well

What "stopped it dead" before you found the flywheel bolt loose ??? If the drive dog/keyplate had failed because of the loose bolt, you would simply have lost drive and not been able to restart the engine.

I'm confused.....

Schrödinger's cat - so which one am I ???

Take the flywheel off again. It could be that either the thrusts are knackered or the crank taper is knackered. In both cases the flywheel could endup jammed against the housing.

This is a guess, but you need to start somewhere

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

Following on from Wil's point about the crank taper..... How hard was it to get the flywheel off for the rebuild (thinking was the taper already damaged?).

And what did you change/renew for the rebuild (ie, rings, bearings, rerbore, or just gaskets ???)

Schrödinger's cat - so which one am I ???

hi
first of all sorry about the spelling. I built the engine myself. I had the crank reground fitted new bearings, new oil pump all new gaskets and had the gearbox rebuilt to. I have stripped it all down now and found the thrust washers to be knackered on one side? it looks like the crank has been pulled over towards the flywheel end? As for the taper its not the best ive seen, but will proberly clean up. Is it ok to do this?
thanks

please give us some pics if poss

did you torgue everything up, and put the right caps and bearing in the right place

Hi again,

First, are you sure the knackered thrusts are putting the crank towards the flywheel end ???

It's virtually always the other way around, ie, the thrust washers that fail are under loading from the clutch release bearing pushing the crank towards the radiator end.

As Benross says, pics will speak a thousand words.....

As for the taper, was it like this before you rebuilt or only since the bolt came loose (if it was poor to start with, it could explain why the bolt came loose).

Schrödinger's cat - so which one am I ???

all depends on the severity of the damage i guess

i used a crank with a suspect taper, has a few 'nicks' which i cleaned up so none were proud, after about 100 miles the flywheel had come adrift, and the crank tail looked like a cricket wicket after a dogs chewed on it...

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