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Author Topic: Coolant leak at cylinder head on rebuild....torque spec's for nuts  (Read 5864 times)
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Motorrad
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« Reply #15 on: September 03, 2014, 09:45:08 PM »

Didn't 87 have smaller studs and only need like 15lbft?
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bens87braap
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« Reply #16 on: September 04, 2014, 12:09:16 AM »

my specs told me 18 so thats what i did 1987 kx 250 undecided

I just read the whole thread Foxx4Beaver allready said 18 dushhh I should read b4 commenting
« Last Edit: September 04, 2014, 02:59:33 AM by bens87braap » Logged
dinkyguitar
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« Reply #17 on: September 04, 2014, 07:57:44 AM »

If you have taken the head stud's past 18.  You might add well order those too.   You have stretched them past t-y

Problem is that this part is no longer available....

Is it possible to go to the hardware store and get a fully threaded hex bolt and cut it to size?

I can also grind off the threads in the middle and make it look just like the stock ones.

dinky,
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Foxx4Beaver
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« Reply #18 on: September 04, 2014, 12:07:44 PM »

here's a site Larry Wiechman posted on here before specifically for the cylinder stud reason....

http://www.mcmaster.com/#standard-threaded-rods/=tkvdx9

I'm sure plenty of other guys have some places they use too.
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dinkyguitar
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« Reply #19 on: September 04, 2014, 01:01:39 PM »

here's a site Larry Wiechman posted on here before specifically for the cylinder stud reason....

http://www.mcmaster.com/#standard-threaded-rods/=tkvdx9

I'm sure plenty of other guys have some places they use too.

Any particular strength they should be? Or what material?

dinky,
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don46
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« Reply #20 on: September 04, 2014, 03:07:14 PM »

several years ago, I had one do the same thing, I'd gotten it from LA sleeve with a big bore kit. I called and the guy told me there was no way it was leaking through the gasket, but it was. I had 2 head kits so I slipped in the other gasket and not problem and yes it was a Cometic gasket. Since then I have used literally hundreds of cometic kits with no issues.
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dinkyguitar
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« Reply #21 on: September 04, 2014, 04:59:25 PM »

several years ago, I had one do the same thing, I'd gotten it from LA sleeve with a big bore kit. I called and the guy told me there was no way it was leaking through the gasket, but it was. I had 2 head kits so I slipped in the other gasket and not problem and yes it was a Cometic gasket. Since then I have used literally hundreds of cometic kits with no issues.

I'm hoping it is the gasket......we'll find out next week....

dinky,
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dinkyguitar
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« Reply #22 on: September 06, 2014, 04:48:30 PM »

So I got this today....



And fixed my leak...

It was a combination of the original crappy gasket (you can see it falling apart after removing it with that copper gasket spray) and torque wrench.

I was using my 1/2 drive torque wrench but it's really made for working with 35ft lbs and more. You can't really "hear" the click. You need to feel it. So I bought a 3/8" drive torque wrench a la harbor freight, $17.00.

And I was surprised how much 18ft lbs really is. When I originally over torqued it using the 1/2" drive, I probably was a little over 18ft lbs...but not by much.

Anyway, I torqued everything down using my new gasket and torque wrench and it worked.

dinky,
« Last Edit: January 24, 2018, 09:58:33 AM by umberto » Logged
Foxx4Beaver
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« Reply #23 on: September 06, 2014, 04:53:40 PM »

excellent!....roost on!
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bens87braap
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« Reply #24 on: September 06, 2014, 05:36:39 PM »

now u can come to Australia to run it in hehe the gate are open
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dinkyguitar
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« Reply #25 on: September 07, 2014, 12:10:08 PM »

Believe me if I could, I would  grin

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Mikkomaan
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« Reply #26 on: January 24, 2018, 08:56:12 AM »

What is cylinderhead nut tightening order?Dont know the word in english... but maybe you understund.
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Heniz
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« Reply #27 on: January 29, 2018, 08:35:26 AM »

What is cylinderhead nut tightening order?Dont know the word in english... but maybe you understund.

star pattern. opposite sides basicly
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