Hello guys,

before we made the posted we used the forum's search option and didn't found answer so we decided to open this thread and seek some advice.

We need an mechanical injector pump for civilian Hummer H1. We're not sure which one do we need. We think we know which one it is but since we are not in a position to take the diesel injector pump out from the vehicle and see the part number, we were wondering if someone can give us a helping hand. Basically we just want to make sure we are ordering the correct part. Bellow I'll post the information concerning the vehicle.

vehicle type: HUMMER H1 6.5l NORMAL NON TURBO DIESEL
year: 1994
VIN: 137YA8435RE151714
engine: 6.5L Diesel V8
color: Green Gloss
civilian 4 door wagon

here are injector pump information:
pump type: mechanical
power supply: 12V

We've encountered several sites that offered electrical pumps, which is not what we need but this led us to suspect whether there are other types of injector pumps that the vehicles from 1994 are using. To our knowledge vehicle from other series with different year of production can potentially have several types of fuel pumps but the ones from 1994 can only carry two types. However like previously stated we're not sure and we want to double check whether we are ordering the correct item.

We've found a good deal for the injector pump priced at 650USD which is manufactured by Stanadyne at one web site. We're not sure if we're allowed to post links in the topic, so we've included a screenshots in the attachment section. Also we've included the pump's diagram which we've got from one nice gentlemen who revealed us some valuable information.

If anyone has suggestion where can we find a better deal or has other information relevant to the topic we'll be forever grateful for the help. Thank you for your time spent in reading our message. Please let us know if you need more information.

 

Talk to Dave Oberer at Hummer Parts Guy | Genuine Hummer H1 Parts and Accessories. He can help you source the correct parts you need whether he has them or not.

 

I just posted on this topic for 1996 H1 (above, "Ronpintx") See my video there.


I'm keen to know how you remove the injector pump -- without lifting the engine block out?


Otherwise, when you do get it removed -- you'll want to send it in with your order for a new one -- to save $$$ on the core charge. So you will doubtless see the part number before shipping it. Otherwise, I'm sure whoever you choose to supply it will be pretty sure which one you need -- with a caveat to double check it when your core arrives.

 

The new injection pumps (IP) we sell (made by AM General) do not have a core charge. Typically a core charge is only required when you are buying a rebuilt part because they need your old ones back to rebuild again.

You do not have to remove the engine to do an IP. This doesn't even make sense.

IP's are failing now at an all-time high rate because of the fuel that we've been using. Our IPs were not designed for Ultra-Low Sulfur Diesel (ULSD), sulfur is a lubricant. When these IP's were designed they were using 1500ppm sulfur in fuel, this then dropped to 500ppm, and then in 2007 the EPA dropped the sulfur again to 15ppm (like it says on the pump at every filling station you go to). So if you're not adding a fuel additive for lubricity you're running your IP on 1% of the lubricant it was designed for and it's no surprise they fail....any lubricated machine will fail.

Couple options:
- have your existing IP rebuilt. We can turn the power up about 15% when rebuilding them.
- buy a new IP. They come with a new PMD on them so remove this before installing the IP onto the engine. HPG has these on sale for $1750 (half price) for 96-03 Hummers or this pump will also work with a P400 engine.

 

A local Stanadyne authorized shop can rebuild yours or you can also order a reman from a place like Badger diesel.

 

Go get some Lucas upper cylinder lubricant(Diesel fuel additive) or whatever you prefer so you dont kill the next pump. All diesel vehicles should use fuel lubricant. The new diesel kills injection systems!