Injection Pump leaking fuel

[82gmc]

My 82 GMC 6.2 truck is in a auto repair shop;

I may have a fuel leak from the injector pump. If the auto place calls me to say it needs to be replaced.

What are my options?

Is there a really good 6.2 mechanic in or near Missoula?

[83Blzr62]

Replacing the injection pump is not to difficult if you are not afraid to work on a vehicle. Just get a good manual and go at it. However, if the pump is not too old or does not have too many miles on it you may be better off trying to find out where it is leaking. There are a few orings that are easy to replace if you can locate them. I had one leaking from the throttle shaft oring 2 years after a rebuild. I replaced the oring and it was fine. This may not be your case though.

If it has more than around 100000 miles on it you might as well get it rebuilt. A good place where I got mine done is www.accuratediesel.com. The guy was very helpful to get mine the way I wanted it.

[82gmc]

Can the motor be run with the intake off the motor? How in the hell can you see what is going on when it's buried under the intake manifold.

I have one hell of a diesel leak when parked and I believe it is coming from the top of the motor.

What did it cost to have the pump rebuilt and what was the turnaround time.

Thanks by the way.

[Robyn]

Yes you can run the engine with the manifold off. Just blow the entire top off well with high pressure air to get rid of loose dirt and crufd.
Be sure when you fire it off and have it running that you dont have anything loose (rags) laying about that can get sucked in to the ports.
You can then look things over well and you will be half way to getting the IP off if you need to.
The leak could be as simple as the fuel inlet hose which is under pressure when the rig is running.

If you need to remove the IP just mark the IP and the front case where they mate with a nice scibe line. The bolts that hold the pump drive to the gear are accessed by removing the oil fill pipe and going right in the hole when the bolts line up (3) use loctite blue whwn you replace them.

No need to remove much else other than the injector lines. (Be sure to make a good map as to where they go, both on the injectors and the IP.

The lines can and should be removed in the pairs that they are clamped in.
Its always good to replace all the rubber isolators and clamps that hold the lines when you put it back together.


If we can be of more help just let us know.

best

Robyn

[More Power]

There are two shops that I"m aware of in Missoula.

Rocky Mountain Diesel
5 Valley Diesel

EIther should be able to help you.

If you want to do any R&R youself, US Diesel Parts in Missoula is an authorized Stanadyne fuel shop. They sell DB rebuilt & new pumps.

Jim

[82gmc]

I haven't gotten my truck back yet but when I do I will be going after the leak. Front end is being worked on.

Is there basicly one model injection pump for the 6.2 regardless of year?

What's the best service manual and where can I get one?

What temp should a 6.2 ran at?


I appreciate the info about the mechanics here in town. My neighbor has large diesel trucks and he has had mixed results with both those shops.

I will let you know what I find when I get to look at it.

[Ebrown]

I had a leak at the Cold weather advance (Passenger Side there is a Brass rod sticking out of the pump). The fuel would drip ito the valley and run the the rear of the valley where there is a hole and the fuel would run down between the engine and the trans then it would drip to the ground. Anyhow it was a pain in the a#% to find where it was driping and next was to fix it!

[82gmc]

Now a new problem related to the new IP...I started a new thread on it....:confused: