Oil pan sealing. Stripped bolt holes

AHarada · 06-22-2008, 03:27 AM

I'm at the point in my build that I'm installing the oil pan. I have a brand new Mazda oil pan and a Garfinkle oil pan brace I'm installing. I made my first attempt tonight, and I made the mistake of not cleaning out the bolt holes with a tap first and ended up stripping a few of the bolt holes (good thing I didn't crack the housings). I'm going to try to put a helicoil in those holes. What are the bolt sizes that they use? Is it a M6x1.00? I'm thinking about also using a Moroso stud kit instead of the bolts included in the Garfinkle brace kit.

IR Performance · 06-24-2008, 08:44 PM

They are m6 x 1.0. Helicoils are fine, just make sure you thread them in enough so that part of the coil does not stick up past the oil pan mating surface. I always run a tap first because the built up silicone and grime causes the bolts to easily strip. I also used the Moroso stud kits will good results. Make sure you lay the pan and brace on first, then screw in the studs.

cewrx7r1 · 06-26-2008, 09:24 AM

Remember that the torque value for these is very low at 74-104 inch pounds!
I suggest a medium value. So many people have stripped this size fastener on their engines.

AHarada · 07-03-2008, 11:57 PM

To update: I got the oil pan sealed and all of the bolt holes are in good condition. I ran a tap through each hole, and pulled out a nice amount of old silicone. Since the bolts only go down about halfway through each hole, only the upper half of 3 holes were stripped. So with the Moroso stud kit installed, none of those were an issue (luckily, those 3 weren't through-holes).

06-22-2008, 03:27 AM	#1
AHarada Rotary Fanatic Join Date: Mar 2008 iTrader: (1) Posts: 162 Rep Power: 17	Oil pan sealing. Stripped bolt holes I'm at the point in my build that I'm installing the oil pan. I have a brand new Mazda oil pan and a Garfinkle oil pan brace I'm installing. I made my first attempt tonight, and I made the mistake of not cleaning out the bolt holes with a tap first and ended up stripping a few of the bolt holes (good thing I didn't crack the housings). I'm going to try to put a helicoil in those holes. What are the bolt sizes that they use? Is it a M6x1.00? I'm thinking about also using a Moroso stud kit instead of the bolts included in the Garfinkle brace kit.

06-24-2008, 08:44 PM	#2
IR Performance Rotary Fanatic Join Date: Feb 2008 Location: Metuchen, NJ iTrader: (2) Posts: 249 Rep Power: 17	They are m6 x 1.0. Helicoils are fine, just make sure you thread them in enough so that part of the coil does not stick up past the oil pan mating surface. I always run a tap first because the built up silicone and grime causes the bolts to easily strip. I also used the Moroso stud kits will good results. Make sure you lay the pan and brace on first, then screw in the studs. __________________ Providing rotary engine rebuilds, porting, turbo installs, parts installations, full maintenance, etc. We work on all cars. www.irperformance.com www.myspace.com/rotaryexperimentseven irperformance@live.com 732-662-1794

06-26-2008, 09:24 AM	#3
cewrx7r1 The Judge Join Date: Feb 2008 iTrader: (0) Posts: 196 Rep Power: 17	Remember that the torque value for these is very low at 74-104 inch pounds! I suggest a medium value. So many people have stripped this size fastener on their engines.

07-03-2008, 11:57 PM	#4
AHarada Rotary Fanatic Join Date: Mar 2008 iTrader: (1) Posts: 162 Rep Power: 17	To update: I got the oil pan sealed and all of the bolt holes are in good condition. I ran a tap through each hole, and pulled out a nice amount of old silicone. Since the bolts only go down about halfway through each hole, only the upper half of 3 holes were stripped. So with the Moroso stud kit installed, none of those were an issue (luckily, those 3 weren't through-holes).