Cylinder studs/ head - Honda TRX Forum
 
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post #1 of 2 Old 04-09-2019, 12:03 PM Thread Starter
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Cylinder studs/ head

How important is it if the nut and washers that hold the head to the cylinder studs aren’t capped like the stock ones? When I use the stock capped nuts I can’t tighten it down tight enough. So that would mean my cylinder studs aren’t down all the way? And if so how far down do they have to be. Length? Height?
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post #2 of 2 Old 04-09-2019, 07:36 PM
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Cap nuts are used prevent oil from running down around the stud and causing a leak at the head gasket for the 3 inside the head cover and preventing water from penetrating the threads and causing corrosion on the one stud outside the head cover

It's not of great concern if you are not worried about an oil leak - personally; I am rebuilding 2002 400EX - I am installing all new washers and cap nuts on the head as 2 are distorted and one is punctured from being installed either without washers or wrong thickness washers or from someone re-using gaskets or over torquing or a combination of more than one possibility.

As to the length - specified length above the gasket surface of the cylinder is; 81.5 mm for the on on the exhaust side, 62.5 on the intake side and 49.5 on the left and right sides - the one i'm working on measures 81, 62 and 50 (measured with a tape measure)
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