cylinder studs - Club700XX - Honda TRX700XX Forum
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post #1 of 6 Old 02-22-2014, 06:52 PM Thread Starter
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cylinder studs

I need a second opinion. I did a top end job on my 85 ATC250R a while back now. I was not satisfied with the way the head seated on the cylinder. I did buy a spare cylinder and head, and had the cylinder bored for the new piston. Anyway, I torqued the head according to the manual. I started it up and it had a slight coolant leak. I did get it to stop leaking, but I went quite a bit beyond the torque specs. Neither the cylinder nor head are warped. And yes, I did use a new head gasket. My question is, is it common for the cylinder studs to stretch? It recently developed another minor leak, so I ordered new studs and nuts, and a top end gasket set. Is there anything else I haven't considered?

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post #2 of 6 Old 02-22-2014, 06:58 PM
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I know that they can stretch on a head on a car do it's possible. The new studs should fix it

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post #3 of 6 Old 02-23-2014, 09:19 AM
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How do you know your head or cylinder is not warped? did you have them resurfaced when the cylinder was bored? Can head studs stretch...yes, and depending on how much over you went on the torque specs...they most likely are now. If you did not have the head and cylinder resurfaced this teardown, my guess would be that one or both is warped, assuming the head gasket was good when installed...it does not take much.

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post #4 of 6 Old 02-23-2014, 11:02 AM Thread Starter
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He did check them, but they were not resurfaced. I tore it down yesterday and checked them myself and had the shop check as well. Neither are warped. I have replaced the studs and replacing the head gasket. Whenever a person buys a new gasket, it is assumed that they are good. That could have been part of the problem. This time, I am using an OEM.

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post #5 of 6 Old 03-01-2014, 10:55 PM Thread Starter
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I finished putting everything back together and all is well. No leaks and torqued the head to spec. I compared the old studs with the new ones, and I could tell no difference. They did not appear to be stretched. Since everything else checked out, I am suspecting it was a bad head gasket.

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post #6 of 6 Old 03-02-2014, 03:02 PM
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Glad you got it worked out.

734 09 Raptor
Meglodon by Bo,KW springs, Web 4 Cam, 54mm TB, 105.5mm CP cylinder, 14:1 CP,Barkers Inframe,Dynatek Coil,PC V,Dynatek Programable ignition,CCP stabilizer,+5 swinger,Boss Noss Sys, Direct Drive Lock-up, KDS Evac valve,HID Light conversion,SPAL fan
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