240D R/R crank & Rod brearings

[M. Theofanides]

Well my daughters 240D lost an oil line and my Daughter drove it till it it was to late. .
I haven't heard it yet but the shop she took it to said there is a knock in the lower end and said it probably needs a new motor.
I'm picking it up next week, she is 200 miles away at college.
How hard is it to R/R the crank and bearings. I hope that is all that was damaged. The car has about 350,000 on it and ran great till this happened. Hoping to save it.

Any help or sugestions?????

thank You

[P.E.Haiges]

M,

The garage might be correct that it needs a rebuilt or used engine (NOT MOTOR). But to really tell, the oil pan would have to be removed to inspect the crankshaft. If the bearings journals are not scored, a new set of main and rod bearings can be installed. But if the journals are scored, the crank must be reground and to do that , the engine must be removed.

To replace the crankshaft only in an engine with that that much mileage would not be prudent because of the labor cost might be more than to R&R a used engine. Soon something else would probably go wrong with the old engine and then you would have the labor cost again.

Best bet would to be find a good used engine. If you can't find one, a rebuilt engine would be the next best thing, but more expensive.

Running an engine with out oil can also damage the rings enough that the engine will be difficult to start when cold. So you should also replace the rings. And while the head is off, do a valve job.

P E H

[engatwork]

I'd look for another engine or worst case a rebuild on the existing. I have never torn into an engine that ran without oil but these are pretty easy engines to rebuild and you can probably do it (if you do it yourself) for between $800 and $1200. I would look around for a good used engine before I tore into it though.

[mplafleur]

A 240D is being parted out by dave1shere on another thread. He may have the engine you need.

[engatwork]

Do a search on ebay. There was a 240D engine listed on there this weekend for a buy it now price of around $350.

[73MB280SEL]

People have been known to just pop the pistons out and put in new rod bearings (and maybe rings). If the rest of the engine is good, you might get away with doing just this and not rebuilding the whole engine.

I've never done this, but a friend of mine threw a timing belt on his econo-commuter-box and had good success doing this. While the pistons were out, he also put in new rings. The cylinders were fine--the car was running good before the timing belt problem--and nothing else was done.

Sholin

[P.E.Haiges]

73MB280SEL,

There's a big difference in an engine that breaks a timing belt and one that is run dry of oil.

P E H