45 replies to this topic

[Cooperman]

It would be wise to re-align the main bearing cap bores by grinding each cap and line boring/honing.
I have never seen that before. What the heck can have caused that?

[Retroman]

You certainly don't need the DTi

 

It will probably be cheaper and better to start with a fresh block

 

As the caps have had such a hammering they will as cooperman says need line boring if they are salvagable at all

 

At least it has not thrown a conrod into the gearbox and cam

[Hippy23]

Well even though i know the motor will probably be scrap im very interested to find out what has went on with it and how it managed to keep running?

 

Apart from the rattle it ran sweet

TIme will tell once i get it opened up. I will post up my findings.

 

Cheers,

[nicklouse]

I am looking forward to the postmortem.

 

sorry but never seen a crank move that much.

[imack]

My friends 1098 ran with the crank broken

[Hippy23]

ahhh ok. Well i will find out tonight or tomorrow night once i get the block off and get a good look.

Hopefully the crank is at least in one piece but anything is possible

[Retroman]

I have seen one let go and the flywheel nearly sawed its way out, conrod cracked the gearbox casing and block

[nicklouse]

seen a flywheel put a big Dent in the front bulkhead .

[rww]

My friends 1098 ran with the crank broken

 

    Broke my 1098 crank near the flywheel and still managed 15 miles to work. The broken ends stay engaged and still transfered power but not without considerable noise. Might get away with just a replacement crank but block will need careful examination.

[Stevie W]

Crank broken?
Friend of mine broke a 1098 crank just behind the transfer case.

+1 for a broken crank with that much movement on the crank tail!! 

[Cooperman]

I think the crank must be broken to get that amount of movement, but you'll soon see once the engine is off the gearbox.

I have a 998 block which wouldn't cost you a lot.

[Hippy23]

Well I think it’s safe to say that I need a new crank. Although it’s still in one piece.

 

I got the motor stripped down last night and before I even slackened off any of the bolts holding the big ends on you can see the play in all the bearings.

 

Once I got it all stripped you can visually see the damage on the crankshaft without even measuring it. Although the clutch main end of the crank does have 0.5mm of difference from the centre to the both sides. Along with this all the profiles are scratched quite badly also.

It’s hard to tell what has caused it as everything was covered in oil but I have noticed that the new oil pump I paid for has not been fitted so I will be having word with my mate when he gets home.

All the shells are badly worn but the block is actually in very good order surprisingly. No damage to report from the block at all. Although I did notice a fresh valve indent in the top of piston 1 for some reason but this could have been caused by me playing about with the timing at the side of the road when I had the choke and throttle mixed up J

 

I have uploaded all the photos and video below into 1 alblum, the only thing I can think of is the oil pump was gubbed or it took too long to prime.

 

 

https://photos.app.g...H9kTEQ5MfhYjm49

 

I’m going to take the crank and block to the engine shop on Friday and see what they think but I think I will need to remove the crank from my seized 998 and use that.

[GraemeC]

I think that’s been built with the wrong size shells - if it had ‘worn’ itself into that state the shells would’ve looked a lot worse.

Adjusting the ignition timing wouldn’t make a valve contact a piston - that can only be camshaft timing which is set as part of building the engine and doesn’t easily change.

I wouldn’t be letting your mate within 100yds of an engine ever again!

Edited by GraemeC, 31 October 2018 - 07:19 AM.

[Hippy23]

I checked all the shells and most of them say standard but a few of them look slighty different from the rest so im not sure if he has mixed a few of the old one's up with the new ones.

 

Dont worry i will be having words with him and doing this one myself or let the engine shop build it.

[Rorf]

Maybe he assembled the engine with grinding paste or sand in it - it looks bad.

 

Assembly cleanliness is critical when building engines.

 

You will also need to strip the gearbox and give everything a good clean there too.

 

How many miles did you do after this rebuild?