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Jac 800 Runs Wothout Head Gasket


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#1 VintageIronCollector OFFLINE  

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Posted December 18, 2013 - 06:56 PM

Today I decided to take the head off of my Jacobsen Chief 800. Turns out there wasn't even any head gasket on it but I had it running before I took it off. How would this happen? Also  there was a little bit of oil on the studs that hold down the head. Not sure if the rings are sealing or not. What should I do?


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#2 bowtiebutler956 OFFLINE  

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Posted December 18, 2013 - 07:22 PM

 If both the block, and head surfaces are good, and true, they will seal with just the use of some coppercoat, or other sealer. When hot rodding these engines, some folks leave the gasket off to increase compression. I wouldn't do it, but some do. As far as your rings are concerned, was it smoking, or burning oil?

 

Matt


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#3 VintageIronCollector OFFLINE  

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Posted December 18, 2013 - 07:25 PM

It smokes a little bit but not noticeable until its revved up.


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#4 boyscout862 ONLINE  

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Posted December 18, 2013 - 07:29 PM

Put a new head gasket on it and put it back together. Give it a good tuning and add Marvel Mystery oil to the gas. Good Luck, Rick
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#5 bowtiebutler956 OFFLINE  

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Posted December 18, 2013 - 08:28 PM

It smokes a little bit but not noticeable until its revved up.

 The only way to really fix it, is to at least re-ring it, but if your just using it as a worker, you could just keep an eye on the oil level. It just depends what your plans are for it.

 

Matt


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