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cjaviator(at)gmail.com
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 Posted: Wed Apr 15, 2009 9:41 pm Post subject: Nanchang Cylinder Base Gaskets |
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Hi all.
Just had a newly overhauled Housai loosen the #4 cylinder base nuts after 2.1 hours.
Upon removing the cylinder we found the rear 2 sets of studs had no tab washers or other form of locking on them.
We also found that all 8 other cylinders have a base gasket of very soft metal construction - #4 had the normal paper gasket.
Can anyone tell me what these gaskets would be made of as we have not disturbed any of them.
Also... what are peoples views on running without the gaskets and just the O-ring (like most other engines). I am sure the Chinese put the gasket there for some reason. Anything to do with the shot peening on the mating face of the crankcase????
regards, Jay
New Zealand.
P.S this is the same aircraft that I had the voltage regulator/generator problem with. It was cured by finding a serviceable voltage regulator....
Interestingly the other aircraft we were playing with had the solid state regulation system with the big heat sink in place of the regulator. The wiring was reversed on it and we cured our induced problem by flashing the generator in the opposite way to which the wiring diagram indicated!
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pfstelwagon(at)earthlink.
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| Posted: Wed Apr 15, 2009 10:20 pm Post subject: Nanchang Cylinder Base Gaskets |
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Use the O-ring and a thin coating of Hylomar (sp) with no gasket. The Hylomar can be hard to find, it is a Permatex brand. Use he lock tabs.
Frank
N23021
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keithmckinley
Joined: 11 Aug 2008
Posts: 434
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| Posted: Sat Apr 18, 2009 9:47 pm Post subject: Re: Nanchang Cylinder Base Gaskets |
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do you have a number/setting for re-torquing the cylinder head bolts?
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wlannon(at)persona.ca
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| Posted: Sun Apr 19, 2009 10:04 am Post subject: Nanchang Cylinder Base Gaskets |
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300 to 320 lb/in.
Walt
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