Okay guys, I have a CLS 6spd w/a CT SC that was removed several weeks ago due to a small oil leak and while loosening one of the bolts that holds the charger to the engine block I notice that last bolt on the bracket did not offer much resistance.

What I notice is that the threads in the engine block hole are stripped, however I can still see some of the original threads further down the hole but the bolt does not reach those threads; BTW this charger was installed by an ACura dealer 3yrs ago so this is the first time I see this cross thread issue. Is there any product out there in the market to re thread/help with stripped threads that dont require drilling/using thread sleeves? All ideas welcome. Thanks

 

How 'bout this?

http://www.sears.com/shc/s/p_10153_1...0P?vName=Tools

 

i think that would just sharped existing thread, and i dont think it does anything for internal thread either. When i worked at a machine shop the only way to fix stripped internal thread was to re weld the hole, drill and tap (i've had to do this many times )

 

yup sounds like a good idea to drill and tap. however, if you think there's enough thread past the part that's stripped, just try a longer bolt.. can't hurt

 

you can use a thing called a heli coli. They sell them at autozone, you drilll out the old threads and screw the coil into it, supposed to be stronger than reg threads. Either way it has to be drilled out.

 

before i drilled into the tread, i'd try to re-tap it. The threads are still there, just need to be cleaned up a bit i'd bet. Then also use a longer bolt to get down to the better threads. Worst case it doesn't work, and you re-drill anyways.

 

the proper way to do it is to drill it and re-thread it to a large size.

 

Last time I pulled my blower, the same thing happened. The dealer pulled the blower to fix the input shaft seal on my gearbox. When I pulled one of the bolts that holds the bracket on, I notice that the threads were jacked. I ran a tap to clean up the threads and came out with a wad of aluminum - basically the threads came out. I picked up a bolt 5mm longer and so far it's holding fine. I just torqued it gently.

If it doesn't hold, I'll probably Helicoil mine. Plenty of room to get a drill in there.
According to Helicoil's website, they're used in aerospace too so they seem to work.
http://www.emhart.com/products/helicoil.asp