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01-16-2010 | 07:58 AM

#5

DarZeelon

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From: Rosh-HaAyin, ISRAEL

RE: Engine Trouble

Quote:

ORIGINAL: Patxipt

You can put another gasket on the glow-plug to reduce compression a bit and heat the engine with a heat gun prior to running. After a few tanks the engine will be broken-in and you won't feel such a tight pinch.

Pat,

Adding a plug gasket to the one already there, will reduce the compression by very little...
The effect may be a reduction of the outward expansion of the sleeve, as a result of compression, possibly making the TDC pinch even tighter...

However, it will also reduce the engagement ('bite') of the glow-plug's thread in the head's thread, by about one complete turn.

This may not actually cause direct damage. But if you tighten the glow-plug to the same degree as you did before, it will potentially pull the remaining threads out of the plug's bore... It may even allow the plug to 'shoot' out of the head, while the engine is under full-throttle...

This may require Clarence F. Lee's help; installing a Heli-Coil. Or it may require a new head...

I would consider doing this, a negative advice.

Also, break-in does reduce the pinch somewhat, but a good measure should remain, since the differential heating of the sleeve is 'a feature' of all tapered-bore engines; not just of new ones. It should never be too loose.

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