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The 2003 and up all have the deeper thread count but that still does NOT eliminate the steel plug in an aluminum head issue... It does make plug blow out it rarer then it was originally but even with the low thread count heads the plug blow out issue was very rare and most always tracked to too tight or too loose a plug...
If you use 30 foot pounds you run the risk of over torque and the predictable results...
168 inch pounds or 14Ft pounds is the recommended torque in the manuals
Based on engineering books I have, 14 ft ponds is right about the middle of the range that the hole diameter and thread count suggest... 12 ft pound (144 inch pounds) to 16 foot pounds (192 inch pounds) is the range for the dimensions I looked up assuming a hardened aluminum casting
inch pounds = foot pounds X 12
30 ft pounds would be around 100% over torque... you decide
Last edited by Fredvon4; Sep 20, 2007 at 06:40 PM.
I use a 3/8th "click" type 100~300 inch pound torque wrench
I also use a 3/8ths ratchet wrench with short 3", medium 6", and long 9", 3/8th extensions and a wobble "U" joint with a "capture" type plug socket
YOU really need a source of compressed air to do a plug job on this motor
I blow out each hole then slightly loosen a plug, and before removing it all the way, blow out again...I do one plug at a time so to keep from blowing all the sand, mud, and crap into any open hole
Forced air is a must.
I used a shop vac as a blower with a duck tape solution from the blower tip to a 3/8 flexible hose left over from a tranny fluid change, fit right over the plug.
You won't believe how much stuff gets in the plug holes.
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