Ok, today I took off the AFC housing and moved the plate full forward. I put the housing full forward and while I was bolting it back up the two bolts on the driver side stripped out the threads inside the pump. Now I am thinking about tapping it. Now what I need to know is if the thread channel goes into the pump. Meaning that shavings will fall through into the pump. Or do I just have to keep shavings from going in where the plate is? Thanks

 

I honestly do not remember.
Take a wire and poke it down the holes. If it stops, they're blind meaning not into the pump cavity. Also means drilling and re-trapping is a bit trickier to avoid drilling into the cavity or breaking a tap when you hit the bottom.

 

Yeah, I see what you mean and that will be tricky. There is a diesel shop here in town that will helacoil (how ever you spell it) it for me for like 300 maybe it was 400 can't remember.

 

They're blind holes. Found a photo in my files from changing my plate. I don't have it on my website so cannot display it here.

 

Thats way too much for a helicoil. Tape off the top of the pump so nothing goes in. Poke the bottom of the holes and find out how deep it is. Get the right tap drill size, put some elec. tape on it to mark the depth. Drill, tap, and go spend your $300 on something better. Just make sure you keep it square to the pump. The metal is soft and will be easy to get crooked.

 

Tate beat me to the reply.
If it was me I wouldn't heli-coil, either. They take out a lot of base metal and easier to screw up than simply moving up to the next size (may be SAE) drilling and re-tapping.
Probably have to enlarge the AFC housing slots, too.

 

So you think I should just tap it and not helicoil it?

 

I don't think there is enough meat to screw the coils into of the same size thread (M6x1.0). Just drill it to M8x1.25 or 5/16". Like was said, you will have to enlarge the AFC slots for the bigger bolts.

 

The few that I've fixed that I didn't strip out I didn't even bother drilling, just tapping to the next SAE size up.
Think it was 1/4", but don't trust me, it's been a long while.

 

Bill Beat to this one....I stripped one bolt on my AFC...I tapped it out to the way he explained...That what I did...tapped it out SAE bolt.....Pretty sure it was also a 1/4 inch..

 

If you do try the helicoil process do be careful. I tried the same thing and wound up having to replace the entire housing because the metal is so soft that the drill went right through into the pump. Luckily, I did not mess anything up inside the pump but all those shavings were down in there and I had to have it taken apart and cleaned and put another housing on it. Yeah, it was a pretty bad lick. Good luck!

 

ok now i feel like a dumb, but what do yall mean with the SAE bolt. dill said SAE next size up? a little lost on this one.

Thanks, and take it easy on me.

 

ok so yall are saying to just tap it and not do any drilling? or do i have to drill it before i tap it? and will tapping it without drilling mess anything up like splitting the housing? never done this before, but i have a friend that knows what he is doing but i want to know how to do it my self so i can make sure he doesn't mess anything up.

Thanks,

 

You do not have to drill the hole in the pump any larger. A ¼" bolt is slightly larger than a 6 mm.
Just get a ¼-28 bottoming tap and cut new threads.
Check the slot in the housing and make sure the ¼" bolt slides freely.

edit use fine thread (28) not coarse (20)

 

Is this what you are talking about? http://www.grainger.com/Grainger/items/4AHP4 on thread type is says NF/UNF is that ok?

Thanks,