Author Topic: Injection pump problmes (Read 5158 times)

firestorm13666 · « **on:** September 20, 2006, 07:12:52 pm »

Well i went to replace the front seal on my IP and after geting it all back together and going to tighten the nut back down to 33Ftlbs it the nut just kept turning and the TQ wrech never clicked.So i need some advice on this.I know iam goign to be SOL.My question is could just the nut be striped and the shaft be fine?Thanks

QuickTD · « **Reply #1 on:** September 20, 2006, 07:17:35 pm »

The shaft is pretty hard, I doubt it's damaged very much. Get a new nut and lay off the torque a bit and it'll be fine. Watch those clicker torque wrenches, they're very consistant but not very accurate, dial or beam types are more accurate.

firestorm13666 · « **Reply #2 on:** September 20, 2006, 07:37:15 pm »

That is what i was thinking myself.So how would i go about taking off the old nut?Also is there any kind of washer that goes on with the nuts,because there is one but it seem too thin.

QuickTD · « **Reply #3 on:** September 20, 2006, 07:46:47 pm »

Is the nut just spinning now and not threading off? You might try clamping vise grips on it and then prying out on the vice grip with a prybar or screwdriver as you try to unscrew the nut, it may catch a bit of thread and turn off.

firestorm13666 · « **Reply #4 on:** September 20, 2006, 07:49:49 pm »

Yep just spins and thats it.I was thinking of using a gear puller on it and try to back the nut off.

coke · « **Reply #5 on:** September 20, 2006, 07:54:54 pm »

Sometimes if you wedge a screwdriver or something on the nut and put pressure on it you can back it off. Most likely its the nut that lost its threads. I've never seen the shaft lose its threads. But I've used the screwdrive trick numerous times to apply pressure and back it off.

Doug · « **Reply #6 on:** September 21, 2006, 04:42:48 am »

Try cutting the nut carefully at opposite ends with a hack saw blade. Then grippng the nut on either side of the cuts bend it with a twisting motion to break it. Or use a nut splitter.

LeeG · « **Reply #7 on:** September 21, 2006, 11:31:22 pm »

I take care of problems like this with a cutting torch. Precision dismantaling with the flame wrench. Really. Keep the flame small and go slow, blowing the material away at a tangent to the shaft. You can blow a nut off a bolt without damaging threads, get a race off a shaft etc. Sometimes the smaller flame of a welding tip gives more control, just crank the oxy once you have an edge of the nut hot.

Doing this in the enginebay does come with some other risks from sparks. Especially if your pump is leaking.

Grab a bunch of old nuts and bolts and practice.

firestorm13666 · « **Reply #8 on:** September 24, 2006, 09:11:24 am »

It's off!!!Well kinda of got pissed and took my 4in grinder to it and slowly ground it away till it was just a round sliver and pulled it off.It turned out the nut was striped out all the way.I think what happend was the nut bottend out because there was not washer behind it and when i went to TQ it down it striped out.So now it's back to gether with a new nut(12MM X 1.75 pitch)and a lock washer.Thanks for the help guys.

Author Topic: Injection pump problmes (Read 5158 times)

Doug