Kx 450 head bolt question

blake10
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blake10
I’m doing a top end rebuild on my kx 450 for the first time. The service manual says to apply a molybdenum disulfide oil solution to the head bolt threads and washers. It explains this is a mixture of engine oil and moly grease at a weight ratio of 10:1. Will I be ok just using engine oil? If not, what moly grease should I get? Seems to be a few different options. Also, should I gradually work my way to 44 ft lbs? manual doesn’t specify. I know some other brands have a more detailed torque procedure. Any advice would be appreciated!
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willbilly
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willbilly 10/25/2022 6:08pm
10/25/2022 6:08pm
Any engine oil will work. Yes the head should be torqued in the specified pattern and in at least 3 stages. I.E. 15, 35, 44ft/lbs.
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mshea397
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mshea397 10/29/2022 6:26pm
10/29/2022 6:26pm
make sure to use new washers
kb228
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kb228 10/30/2022 4:31pm
10/30/2022 4:31pm
I would suggest doing it the way they want you to with new washers. Kx450s are notorious for blowing head gaskets. Changing the thread lube will change the clamping force.
rjg
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rjg 10/30/2022 6:09pm
10/30/2022 6:09pm Edited Date/Time 10/30/2022 6:10pm
That is strange but if they spec it, then that's ok. 44ft*lbs spec'd with moly is some serious torque. If that were dry it would be high.

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