05-15-2009, 11:41 AM
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| Tech Guru resident guru
Join Date: Feb 2002 Location: Fort Mohave, AZ Age: 57
Posts: 1,121
| Re: Dry vs Wet torque specs
Ed,
I'm not clear on why some automotive applications would have wet and dry tourques, but that does not exist for pwc engines. 20-22 ft lb is spec for those head bolts...with or without anti seize. Trying to exceed 22 ft lb could pull threads.
Respectfully, Harry Klemm Quote:
Originally Posted by StandupEd  Harry could you clarify when torqueing Yamaha head blots whether the spec is for a dry or lubricated fastener. I have used anti seize in the past without trouble but recently striped the aluminum threads from the cylinder casting while I inadvertently over torqued a head bolt. I have seen torque reduction figures from automotive sources from dry to wet as much as 40%. Others say Steel fasteners into aluminum threads should always be lubricated. Thanks |
__________________ Unless otherwise stated, responses to all forum posts are based on my personal experiences working within the PWC industry, and developing high performance PWCs since 1987. www.groupk.com |
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