Author Topic: MrsW has a dent in her head.  (Read 868 times)

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Offline Wallacey

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MrsW has a dent in her head.
« on: January 09, 2016, 01:41:11 PM »
This is the head from my wifes 1992 GPX250.
It's a project bike for her to learn on, everything has to be done as cheaply as possible, although safety is also paramount.

Anyway, I was running it after cleaning the carbs and found that it had a problem with the head gasket.
So I pulled it down to have a look.
This is what I found, after cleaning the head with an oilstone.
There is a dent right where the gasket seals   ;:q





The gasket also has a dent in the corresponding place.


]
This should be a good test for jb weld   ::w



Any opinions or advice are welcome!   :-*
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Offline LordDread

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Re: MrsW has a dent in her head.
« Reply #1 on: January 10, 2016, 09:39:33 AM »
that should work fine, i'd also spray the gasket with copper gasket spray when you put it all back togeather

Offline Wallacey

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Re: MrsW has a dent in her head.
« Reply #2 on: January 10, 2016, 10:55:44 AM »
Thanks LD, I bought a can of that copper gasket spray just the other day!
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Offline Hardman

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Re: MrsW has a dent in her head.
« Reply #3 on: January 10, 2016, 11:44:17 AM »
:)

That JB Weld is crazy good stuff.

Cheers

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Offline Smokey

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Re: MrsW has a dent in her head.
« Reply #4 on: January 10, 2016, 07:25:53 PM »
Was the block clean in the corresponding spot?
 

Offline Wallacey

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Re: MrsW has a dent in her head.
« Reply #5 on: January 11, 2016, 11:21:01 AM »
Was the block clean in the corresponding spot?

It seems ok.

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Offline Richo

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Re: MrsW has a dent in her head.
« Reply #6 on: January 12, 2016, 02:22:14 PM »
Blast fuck out of the dent with conact cleaner or rubbing alcohol before jb welding it.

+1 on the copper spray

Also whet stone the barrel faces and then whack em with the detergent / water twice and compressed air dry. You sure don't want grinding stone particles in your combustion chambers !

If you've got a die grinder then I'd also chamfer the sharp casting edges on the head around the valves to improve the squish band / hot spot reduction = more ping proof on stinking hot aussie days.
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Offline Hardman

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Re: MrsW has a dent in her head.
« Reply #7 on: January 12, 2016, 02:41:21 PM »
:)

I think from last pic in first post he's already done the JB Weld ?

Cheers
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Offline Wallacey

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Re: MrsW has a dent in her head.
« Reply #8 on: January 12, 2016, 03:31:51 PM »
Blast fuck out of the dent with conact cleaner or rubbing alcohol before jb welding it.

+1 on the copper spray

Also whet stone the barrel faces and then whack em with the detergent / water twice and compressed air dry. You sure don't want grinding stone particles in your combustion chambers !

If you've got a die grinder then I'd also chamfer the sharp casting edges on the head around the valves to improve the squish band / hot spot reduction = more ping proof on stinking hot aussie days.

I used carby cleaner on the dent, and then roughed it up with a stone for a dremel.

I've already been at the barrels for quite some time! More you reckon?

I only have a dremel (which I have already used to smooth out the casting marks in the ports.
I'll check out the valve pockets now you mention it.

Btw, I was planning on reusing the metal base gasket as it only keeps oil in, new oem head gasket ordered.

Thanks for the input, I know that you know your way around this sort of shit  :-*
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