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| MazdaSpeed 3 - Engine, Transmission & Driveline Discussion of engine, tranny and drivelines. |
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10-07-2019, 05:29 PM
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(Thread Starter) |   Not Ranked : 0 score  Main bolt torque procedure Hey guys, Anyone here built an engine with the OEM main bolts? The assembly manual indicates to oil the bolts before torquing. My question: Should i completely submerge the bolts in oil? As in threads and bottom of the head of the bolt? Reason I ask is because i am aware that oil on the threads will change torque specs and I don't want to screw up this part by over/under torquing. Also, I did some reading and heard that the OEM mains should be ok for a sub-400 Hp application. Anyone able to confirm this?
__________________ 06 MS6; Cpe catted dp; HSK BPV; 3" Catback; K&N intake Build in progress -> 07 MS6; Supertech 4032 pistons; Manely H beam rods; bnr s4; |
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10-08-2019, 06:48 AM
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| Not Ranked : 0 score oem main aren't a problem for 400....rods are more sensitives and head bolts... You either don't want to have thread friction to limit clamping force and you don't want the hole to have oil in the hole that limit the bolt from going down... I use oil but i sink the bolt in it and let it drop or wipe any excess. i don't put any oil in the thread hole...This worked fine for few engines and i did see my machinist using special grease where it was critical.... Maybe @MSMS3 can comment about the right technique
__________________ Mazda for life...or until i can afford something better... 2007 rusted Speed6... Forged with meth and a 3076 in progress... 1993 Ford Probe KLZE 143dB 2012 Mazda3 Gs-sky 6.5l/100 when transporting speed parts 1989 GM 6.2 diesel pickup Wife drive 2010 CX7 2007 speed3 burned (i'm proud to ran 12.7s with it) ...Because French Canadian... If you check for leaks and you didn't made a test under compressor pressure, you aren't done checking for leaks.... |
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| The Following User Says Thank You to Jeff23spl For This Useful Post: | Ced2142 (10-10-2019) |
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