Taken number 3 piston out my block today as i thought the rings had gone. Well they havent,

got this instead

Number 3 shells,


Here is number 1


Number 2,


Number 4,


The number 3 was well fooked, the metal had gathered i the sump as a small lump.

Doesnt even fit the conrod anymore.


The annoying thing is, this engine was only put together 1000 miles ago

Any ideas of the cause? Oil Pressure was fine.

 

Have you checked the crank, That could be worn?

 

Possibly oil contamination, oil galleries obstruction or incorrect bearing to crank clearance?

 

Thats bad for 1000 miles. Did you get crank ground? Are the shells the correct size? Are they made for your engine not a lesser model?

 

The crank was ground at the same time and the shells came from the same place.


All the other journals are fine except number 3 which is fooked

 

Everything was cleaned merticulosly. The oil was the best for the job and the filter was changed at 100 miles and new oil, then again at 500 miles.

 

what size was the crank ground to? Chek the shells, make sure they were correct size. Failng that its possible oil starvation. Have you checked the oil pump?

 

The shells from number 1 and 4 dont look very good either, look like theyve been marked by the crank as its rotated, definitely not what i'd be expecting from a 1000 mile engine tbh! The shells from number 2 look very similar although its hard to tell with the amount of oil thats on them in the photo.

 

Havent had the pump off yet. So pissed off im on the verge of selling it/breaking it. Cant remember what it was ground to but the shells were correct for what they said they had ground it to. I remember it at the time.

 

I agree but they hadnt marked the crank whereas number 3 has fooked it

 

Was the oil pump new? Are there any other signs of damage to anything else? What do the sides of the pistons look like?

 

Get the oil pump off and open it up, that would be my guess.

 

My guess would be oil pump is defo fucked now.... Looks like debris in the engine after maching left behind

 

Not nice that.
It was hardy over fueling and fooked the oil up.

 

Just get it in bits, and I'll pop over monday(24) so we can form a action plan, etc.
tabetha

 

What made you suspicous,could you hear it,or was there swarf in the oil,
I'm worried about mine now

 

i too would check you oil pump looks like by looking at your other shells the whole lot was getting close to give it up!

 

Last August

 

Even if the crank had been ground and shells supplied, doesnt mean it had been done properly! or the shells were right....posability.

 

i have or had this problem iam still connecting hoses to try my new acl shells, but i was told you need the correct squash on the shells ie the rod caps torqued up right think it explains on youtube if you can find it ? if you look at my threads see what people said mate may help ?

 

mine are acl shells

 

also just to note mine wernt as bad as them shells but did notice 1 bolt seemed too loose so would have been only properly seated around the crank jernals
did you notice 1 bolt not quite as tight ?

 

i got mine off ebay 38.00 then went to our customers and he said shud av come to me i can get you them for 15quid

 

agree getting sold the wrong size happens alot even with an experienced engineer supplying and turns out to be an expensive headache.

 

Oil looks very emulsified, was it like that or is that just when it came apart?

 

thanks for the replys chaps,think i'm going to take apart tomorrow