Engine buggered - a sort of rebuild thread...

[MadStu]

Poor Bunker get's picked up by a very, VERY nice man.

His Engine is Foooked.

[MadStu]

LOL, he rang me up and said "Mate, I'm f***ing f***ed. My f***ing f***er engine is f***ed"

He wasn't too far from me so I rode out with some food/hot drink for him.

He still has to investigate, but something wrong with his engine.

[Bunker]

Thanks everyone - yesterday was quite an adventure! I left home at 1000hrs and finally got to Brighton at 1900hrs !

The symptons were total loss of drive whilst at 70mph. I assumed (hoped) it was the belt again, hence the removed panel. I was mortified to find the belt in good order. There is a rattling in the head when I push it which doesnt change whether the clutch is in or out and the spark plug hardly turns for removal, it will come but very stiff. I think I have either blown a hole in the piston or more likely, somehow knackered a valve.

Ill be whipping the lump out this week and hope to stick my 604 in with the Apophis made exhaust etc. Then Ill open the 500 skull and look at what remains.

Funny thing is, I had decided on the way down to sell this engine, I guess it heard my thoughts!!!

Ill update you when I know...

[Bunker]

I meant to say a HUGE thank you to Mrs MadStu for making me some fabulous sarnies and a thermos of tea, not to mention the dozens of biscuits and chocolates....ate the lot of course..just to be polite..

[Bunker]

Just finished taking the engine out - 2 hours! Will open the cranium tomorrow.....

[Bunker]

OK, anyone tell me if I can patch this up ?.....you think thats bad, should see the head......barrel is also fubar'd..and yes, thats a VALVE 'welded' into it....

[Wirralman]

OOPS- No wonder you needed recovery- but what caused it?

[Minter]

A fine example of 'dropping a valve'! Go to the top of the class! Always worth mounting on a plynth and having pride of place next to your toolbox!

[Bunker]

Yes will definitely end up as a trophy for something...

[Bunker]

What's the bottom end like?

Looks fine, a few fragments dropped in when I pulled the top off but should clear out. Question is, what to do now. The barrel is (was) a 500 nicasil and the head a 604 but I had the longer stroke like the MZ....