Ok, big thanks. Our diesel mechanic family friend said the same thing. Helicoil brand removes a lot of material. Non-helicoil brand better and then thread lock like you said. Researching time sert now. I appreciate your response because This is all very new to me and a critical repair.
Red loctite on the time sert sleeve,not the bolt
Generally so but it gives a better " purchase" into the base material giving better prevention against stripping in the future.
Had one on the oil pan drain plug,red loctite and helicoil. When bike was hot,oil somehow found its way between helicoil and the pan hole where the coil has been threaded in. I did made a mistake when using it on the oil plug. 2nd,failure was on the swingarm,chain tensioner slide hole. Threds stripped after some time.
Yea,it might be an isolated situation(s). I just have more "trust" in solid machined one piece sleeve than i do in piece of coil. But like i said,its just my personal preference.
Uggggggg.
In my opinion, repairing the first time with a Heli-coil allows future option for a repair with a solid insert. Most of us don't keep stuff long enough to see iteration #2 but it is a nice "defense in depth" option.
-Doing the re-tap would have been my suggestion too but I've already clogged the bandwidth with my long winded explanations far too often. The heat generated by injection molds might have softened a thread-locking agent enough to allow the coil to back out (maybe not). I'll readily admit that I lacked the nerve to take a chance on destroying an injection mold that cost more than several years earnings. I either used a Keensert of talked the boss into welding the hole up for drill/tap. I guess he didn't want to gamble either after I described the potential carnage. I appreciate you sharing your real world experiences.
I too have had good success with Helicoil on rocker covers and other applications. I moved away from using any threadlocker as I found the contact of the bare insert to the base material keeps tighter tolerances and prevents any interference with the friction retention thats designed to keep it in place. On applications that need potential removal I will use anti-seize on the bolt after insert installation, which also lowers galling issues with the stainless helicoil.
I second this. Time Serts with locktite (careful to get only on the outer surface!) are very good. Make sure you take things apart enough to do a good clean job and start the hole normal. I used some of these on small diameter valve cover studs for a Honda Civic engine with an Al block and it came out very well. Better than new strength since steel is much more durable for threads in small diameters than Aluminum.
Are you asking if it was already repaired? No, those are the threads out of the aluminum head.these isn’t indicative of a failed helicoil that I was not aware of right?
I haven't had any issues if I use red loctite. I still try to do machined inserts of some sort of possible though.
Assuming you're talking about using red on a helicoil, I can't say I'd recommend that. Helicoils are stainless, so without using an activating primer, they don't adhere well to anaerobic thread locking compounds. They're also not leakproof, so no matter how careful you are, some of the red will work it's way to the inner part. I also think part of the magic of a helicoil is it's ability to shift in the hole while it bridges the gap between the inner and outer threads, and thread locker could make things worse.
No, that's indicative of someone overtightening trying to stop the gasket from leaking after it has aged and shrunk. Replace those grommets as well as the gasket. You got lucky and only the threads pulled out, I have seen those bolts get overzealously tightened and cracking the head.these isn’t indicative of a failed helicoil that I was not aware of right?
I wonder how the heck i allowed this to happen.
-Things like that have happened to all of us that:
Oh yes….but it shave the aluminum so evenly….
Agreed about the rock hard grommet but cracking the head with an M6 bolt?? I think we see the consequences.
Thats funny. Helicoil taps are exactly the same size as Timesert Taps. I personally probably use 5-6 8MM x 1.25 helicoils every week fixing exhaust manifold bolt holes in late model Hemi and LS aluminum cylinder heads.
The bolt is in perfect shape.
