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post #1 of (permalink) Old 06-27-2001, 12:47 AM
Wrangler88
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Leaky head cause oily plugs?

will bad valve seals cause oil to get into the cylinders and cause the plugs to get full of oil and foul out?
thanks


(\/)ikey
1988 Wrangler Laredo 4.2L w/5spd
1995 Wrangler 2.5L w/ 5spd / 32"BFG MT's
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post #2 of (permalink) Old 06-27-2001, 07:29 AM
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Re: Leaky head cause oily plugs?

Yes, if the seals are bad enough... A leaky vavle guide seal usually will only cause the engine to emit the blue puff of smoke on startup and then the engine will burn off the oil.

If the engine's always smoking the problem is a burnt valve, bad rings or a bad head gasket.

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post #3 of (permalink) Old 06-27-2001, 08:28 AM
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Re: Leaky head cause oily plugs?

Sounds familiar. Is it an easy or difficult job replacing the valve seals? Would I need to rebuild?

Fritz

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post #4 of (permalink) Old 06-27-2001, 08:39 AM
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Re: Leaky head cause oily plugs?

Easy fix.

By some small diameter cotton rope.
Pull ALL spark plugs.
Remove the Valve Cover.
Start on Cylinder One.
Find the compression stroke.
Feed in the rope as much as you can into the cylinder.
Manually advance the engine til the pistion squashes the rope agains the valves.

Now you can take off the keeps and springs for the valves and they won't fall into the cylinder.

When you've repalced the seals, re-assemble the vavle train and repeat on the other cylindrs.

It's a piece of cake. With the money you save take the family out for rootbeer floats!

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post #5 of (permalink) Old 06-28-2001, 10:45 AM
glennCJ7
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Re: Leaky head cause oily plugs?

Another way to keep the Valves from falling in the cyl is with air. You can buy an adapter or make one by brazing or welding a male air line conector to the metal portion of a spark plug (just knock the ceramic centre out). Just turn the engine close to BDC and apply shop air. It will find BDC all by its self.

Glenn

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post #6 of (permalink) Old 06-28-2001, 10:48 AM
glennCJ7
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Re: Leaky head cause oily plugs?

Another way to keep the Valves from falling in the cyl is with air. You can buy an adapter or make one by brazing or welding a male air line conector to the metal portion of a spark plug (just knock the ceramic centre out). Just turn the engine close to BDC and slowly apply shop air. It will find BDC all by its self.

Glenn

Build what I can, buy only what I must.[img]/wwwthreads_images/icons/crazy.gif[/img]
82CJ7 Rebuilding again.
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