Injection pump bolts

[jan lauwers]

Hello folks,

One of the 3 bolts that holds the Injection Pump to the block is damaged (Thread is ruined). Does anybody know how this bolt is fitted into the block? Is it screwed in, and can I replace it? What is the best solution to this problem please?

See picture.

Many tanks!

Jan

[jameshoward]

The best solution is probably the easiest, which would seem to be applying the appropriately sized thread file to the threads, or attempting to re-cut. The damage doesn't look that bad at all. I'd hardly say it's ruined.

[ja17]

It is a stud which is threaded into the block. Caution, these can be hard to remove. Do not snap it off.  I like the idea of restoring the old threads. Otherwise some heat from a propane torch may help to release the stud.

[Benz Dr.]

I would use a die to re-cut the original threads. You will probably need to use a vice grip to turn the die do to limited space.

[UJJ]

The die is available as a hex, so you can use a socket to turn it.
Good luck

[ejboyd5]

Considering the importance of the stud involved (and the difficulty in replacing it if the repair gets messed up) I would definitely seek out a rethreading die rather than a threading die.  A rethreading die tends to push the threads back into proper orientation rather than cutting away quantities of metal thereby leaving a stronger fitting.

[Benz Dr.]

Considering the importance of the stud involved (and the difficulty in replacing it if the repair gets messed up) I would definitely seek out a rethreading die rather than a threading die.  A rethreading die tends to push the threads back into proper orientation rather than cutting away quantities of metal thereby leaving a stronger fitting.

Good consideration to make. The IP is held in place very firmly and is not likely to come loose or move around if tightened properly. I have however, seen cases when oil would seep out if the nuts on the flange weren't tight. Come to think of it, there are a multitude of places where things can seep out on our cars. Take your pick, there's lots to choose from.

[wwheeler]

I have found that using a threading die to clean up existing damaged threads, results in a MUCH looser fit with the nut. The rethreading die maintains a better fit. So I would agree to use a rethreading die here. Should be easy to find. I have a kit and use it constantly. I would highly recommend this to anybody who works on their own car.

http://www.amazon.com/Kastar-972-Piece-Master-Rethreader/dp/B0080IKATU

I have this kit and even comes with the thread files. Don't try to force fit threads. Use this kit and clean the threads so they fit well before you assemble.

[ja17]

If you decide to change the stud, borrow or buy a good stud removal tool. They work nicely. Make sure to source a new stud first. Restoring the old threads is still the best option.