Mitsubishi L200 (running and driving once again).

[spunkymonkey]

^^^ Wot he sed ^^^

If the big ends are wobbling sideways in use then you've got far bigger problems than worn bearings because all the forces on them should be along their axis, which won't make them move in that direction!

[pauldaf44]

Thanks guys thats why I asked. At college we were always told that any play at all in a big end or main bearing spelt immenent engine doom. But I also figured that 1/2mm play in 3 seperate bearings should be very easily noticable when the engine was running and the seller dealing with these engines everyday would have picked up on it. Certainlly the one spun bearing on the old engine sounded like a train wreck but that had play perpendicular to the crank.

[33grinder]

Bang on what everyone else has said.

Here's Rover's crank before it was swapped out. Some bearings worse than others but demonstrates the play you don't want.

[pauldaf44]

It appears that the original engine failure was more than just big end failure. Upon cleaning out the sump in order to fit to the replacement engine I found it not only to be full of shell bearing swarthe but there is also definate evidence that a needle roller bearing somewhere inside the engine has completly collapsed as the sump was full of needle rollers. I will be able to find out where they came from when I rebuild the original lump but would anyone hasn't to guess which bearing/s has/have deposited there insides in the sump.

[pauldaf44]

Ive been at this all day again today and have finally broken the back of the job. The new engine has now been built up ready to go into the car tomorrow, well once I put the clutch back that is.

Sumps swapped
Diesel injection pumps swapped so have also timed up the injection pump and triple checked that the valve timing is spot on, it does seem to be.
Flywheel had been pulled and a new spigot bearing fitted.
Dipsticks changed new blank removed and original hole blanked.
Alternator swapped over.

She goes in tomorrow after ive finished cleaning and this is how she stands now. Another major job tomorrow is to tidy and sort the tools ;D



Ive also had time to start stripping the old engine to investigate the cause of failure.



Those were the contents of the sump after the oil had been drained so no doubt theres is a fair amount in the drainer pan too. As you can see there is bearing swarthe there but also there are numerous roller bearings in the sump.



Another cause of the knocking has to be this. This cam follower is not only mullered its missing! That also probably explains the needle rollers. The casing and rocker are both badly damaged and the resulting swarthe is all over the head and in the sump.



After removing the rocker shaft the condition of the cam is revealed and its not good. The lobe is deeply scored and a chunk of it is missing so that camshaft is scrap! This engine must have been running on 3 as the rocker was damaged enough that I doubt that it would have been able to open the valve very far if at all.

[Nick]

which renders that engine scrap and fit for nothing but the bin, dont even bother with it.

[thebear54]

I agree with Nick....BIN IT

John

[pauldaf44]

Thats the plan im going to take anything useable of it first though and then weigh it in.

[33grinder]

So glad you didn't buy the used turbo and stuck it on that lot.

Hopefully there's a bit of weight in that engine.

[Kenr]

Is this really an example of an engine that ran well during your test run and then lunching itself when you drove it home. That really has to be enormous bad luck or something dodgy. Would/could failure on such a level occur like this over such a time scale? Just wondering.