Ian236

Big Ends gone - type uk ST17 8K on the clock , thank god for 3 year warranty

WREXY

Sorry to hear!

Make sure you ask what the cause was. Like was it detonation.

Would you keep us posted too please?

Cheers,

Wrexy.

kevin stanton

good job for the warrenty, i hope you get it sorted without any fuss.

keep us posted

RON

Call me daft, but I don't think detonation would cause a big-end to go, it might melt a piston though!!!

dhorwich

Det can lead to big end failure..!!! The force of the piston being pushed down by det is what can damage the big ends... not a very technical explanation... im sure someone else can give a better description..

Dan

dean harris

Ron,That means your daft then. (Only joking mate!)See you at the next meet.
Regards
Dean

Deep Singh

When we say 'big end' what does that actually refer to?

Mickle

Ian236 - Any mods at all or standard?

dhorwich

big end bearing...!!! in the term above... but in general i.e the big end of your engine is the bottom end or engine 'block' and internals.

Dan

[Edited by dhorwich - 4/26/2003 11:15:37 PM]

Pavlo

Big end bearing is the bearing at the crank end of the connecting rod. The connecting rod, or con-rod connects piston to crank.

'Detonation' as the name suggests is spontaneous ignition of large portions of the inlet charge rather than a controlled burn from the spark. The explosive nature of the detonation can force the con-rod down onto the crank pin expelling the oil film between crank pin and big end bearing shell causing the bearing to bind a little. Repeat that many times and he bearing gives up.

I think many people doing Subaru engines at the moment seem to agree that det is the biggest killer of scoob engines.

Paul

edited for clarity

[Edited by Pavlo - 4/27/2003 10:34:41 AM]

dhorwich

pavlo,

Thats more like it..!!!' a technical answer..!!

Dan

[Edited by dhorwich - 4/26/2003 11:16:13 PM]

Leslie

If you imagine detonation as being equivalent to hitting your piston tops with a lump hammer really hard and all those times per minute according to the RPM, then you may become even more keen to avoid it. As Pavlo says, it is a killer!

Les