1980 Liquifire Project

nick80lf · Post by **nick80lf** » Sun Dec 13, 2015 12:20 am

The best way to know for sure is a coolant pressure tester. Most auto parts stores will have them as a loaner tool.

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Packers29 · Post by **Packers29** » Sun Dec 13, 2015 2:06 pm

I think that is what it is doing nick I noticed coolant around the studs. The PTO side seems to be the one leaking the Mag side i see no coolant leaking. The head must be warped and not sealing correctly. Ill have to take a closer look to make sure its flat along with the jug.

JDT · Post by **JDT** » Mon Dec 14, 2015 10:18 am

Andrew check the stud length to be sure they are all the same and one or two have not worked loose.

Also be sure all the head bolt washers are the same thickness.
A thinner washer allows the acorn nut to bottom out internally before the head is at the correct torque.

Packers29 · Post by **Packers29** » Mon Dec 14, 2015 10:58 am

Will do thanks JDT.

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sledhead16 · Post by **sledhead16** » Tue Dec 15, 2015 8:37 pm

Open end nuts like the ones one my rebuilt motors won't bottom out like the acorn nuts could.

Packers29 · Post by **Packers29** » Tue Dec 15, 2015 10:18 pm

But then you don't have the awesome chrome acorn nuts!

JDT · Post by **JDT** » Wed Dec 16, 2015 11:32 am

I have seen examples where the head nuts were over torqued and this caused the studs to stretch.

Then the acorns bottom out and you can't get the gasket tight.

Quick fix is to used thicker washers.

Packers29 · Post by **Packers29** » Wed Dec 16, 2015 3:24 pm

Thats the plan add some more washers.

Packers29 · Post by **Packers29** » Thu Dec 17, 2015 6:09 pm

It's apart again.

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nick80lf · Post by **nick80lf** » Thu Dec 17, 2015 7:06 pm

If your already aware of this I apologize.

As odd as this may sound, the manual for the Kawasaki Invaders tell you to apply Kawaibond (basically yamabond or threebond case sealer) to the head gasket.

The OEM Deere gaskets had a sealant preapplied.

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sledhead16 · Post by **sledhead16** » Thu Dec 17, 2015 9:28 pm

Scraping the old material off the NOS and using new sealant is the way to go

Packers29 · Post by **Packers29** » Thu Dec 17, 2015 9:37 pm

I did not know that. Rob suggested using copper gasket material on the weisco gaskets I ordered. Essentially that does the same thing right?

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Jd sled rider · Post by **Jd sled rider** » Fri Dec 18, 2015 7:34 am

Was the sea lent dry or hard on the nos gaskets? I have used several sets just the way they are and had no problems. How do you scrape it off without hurting it, and what do you use in place of? Thanks lincoln

sledhead16 · Post by **sledhead16** » Sat Dec 19, 2015 1:53 pm

Scrape it with any tool gentle enough to get the old residue off then any bond like the yamabond or threebond. The copper sealant is a great idea too

Packers29 · Post by **Packers29** » Sun Dec 20, 2015 12:19 pm

JDRob is helping me finish the project A new head and redone recoil. Thanks Rob.

1980 Liquifire Project

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