Posted January 4, 20214 yr comment_613845 So I’m a novice gear head...I replaced the oil sump pan gasket and the previous owner(s) stripped several of the bolts holding the pan to the block. The bolts are M6-1. What method would you recommend to repair? I think coil inserts would work and I could keep the original M6 bolts and torque specs. Tang or no tang? Thank you. 240Z 1970 early series. Link to comment https://www.classiczcars.com/forums/topic/64924-stripped-threads/ Share on other sites More sharing options...
January 4, 20214 yr comment_613855 A Helicoil insert will do the job quick and easy, the torque spec I think is about 6lbs so not a lot, using a Time-sert is a better more permanent fix but will cost a little more. Using either of those methods means removing the oil pan to do the drilling or drilling through the pan lip and using a larger washer then stock. Link to comment https://www.classiczcars.com/forums/topic/64924-stripped-threads/#findComment-613855 Share on other sites More sharing options...
January 8, 20214 yr comment_614082 Only a few of the pan bolt holes in L series blocks are blind, so a helicoil isnt going to work in most of them. Better just to drill and tap those to 8 or TIG and redrill. . . Link to comment https://www.classiczcars.com/forums/topic/64924-stripped-threads/#findComment-614082 Share on other sites More sharing options...
January 8, 20214 yr comment_614084 On 1/3/2021 at 10:11 PM, DedZed said: So I’m a novice gear head...I replaced the oil sump pan gasket and the previous owner(s) stripped several of the bolts holding the pan to the block. The bolts are M6-1. What method would you recommend to repair? I think coil inserts would work and I could keep the original M6 bolts and torque specs. Tang or no tang? Thank you. 240Z 1970 early series. Helicoils are an excellent method for repairing stripped threads. Be sure and evenly torque the bolts using a torque wrench on reassembly. What do you mean by tang? On 1/4/2021 at 5:27 AM, grannyknot said: A Helicoil insert will do the job quick and easy, the torque spec I think is about 6lbs so not a lot, using a Time-sert is a better more permanent fix but will cost a little more. Using either of those methods means removing the oil pan to do the drilling or drilling through the pan lip and using a larger washer then stock. What is a Time-sert? Never heard of it. 45 minutes ago, twofouroh said: Only a few of the pan bolt holes in L series blocks are blind, so a helicoil isnt going to work in most of them. Better just to drill and tap those to 8 or TIG and redrill. . . Why wouldn't a helicoil work in a through hole? I've used them in through holes many times. Loctite red thread locker will keep them in place. Edited January 8, 20214 yr by Racer X Link to comment https://www.classiczcars.com/forums/topic/64924-stripped-threads/#findComment-614084 Share on other sites More sharing options...
January 8, 20214 yr comment_614086 33 minutes ago, Racer X said: What is a Time-sert? Never heard of it. http://www.timesert.com/ It is a permanent fix, you are actually replacing the threads. It also has a self locking expansion lip at the bottom, very well engineered. I'm sure there must be some youtube videos of them. A Helicoil is better than nothing but it's a temporary fix because they are so easy to dislodge. Link to comment https://www.classiczcars.com/forums/topic/64924-stripped-threads/#findComment-614086 Share on other sites More sharing options...
January 8, 20214 yr comment_614101 +1 for Timesert. I use both coil inserts and timeserts. They both have their place. Lots of aluminum parts require coil inserts especially in aircraft work. Link to comment https://www.classiczcars.com/forums/topic/64924-stripped-threads/#findComment-614101 Share on other sites More sharing options...
December 2, 20213 yr comment_632553 I just came across this video with what seems to be an unbiased comparison of helicoils, timeserts and key locking type inserts. It's very long but shows some interesting results. I won't spoil it for you. Lol Cheers, Mike Edited December 2, 20213 yr by CanTechZ Link to comment https://www.classiczcars.com/forums/topic/64924-stripped-threads/#findComment-632553 Share on other sites More sharing options...
Create an account or sign in to comment