I just got off the phone with AutoMeter, and they told me they do not recommend the use of their gauges with diesel fuel. I see a bunch of fellas running AM gauges, and I have the truck going in to a local dealer next Monday. Can anyone tell me how they have their gauges working, I would assume they are all mounted inside the cab?? I am worried about the lift pump, and would like to be able to monitor pressure. Thanks in advance for your help.

 

I have never heard a thing about it. I know a guy in Cynthiana who use to have Autometer on his 2000.<br>He switched to DiPricol when he saw mine. So who knows.

 

One way to avoid the gauge seeing the diesel is to fill the line from the gauge to the engine with another medium first, before the diesel even has a chance to 'contaminate' the line. There are a few mediums one can use such as lightweight glycerin. Other readers may chip in a with better suggestions. Just be careful of the medium you choose in cold climates as the gauge may become very sluggish. However I really can't see any reason for a mechanical gauge to not work forever with diesel as all componants to my knowledge that are in contact with the diesel are metal.<br> Now if you are using an electrical gauge with a sender, that MAY cause a problem eventually. The sender in all units I have seen use a rubber diaphragm. If this is the case then I can see the possibility that diesel could attack the rubber in time. One way around this problem using an electrical gauge is to attach a line of about two feet (or longer) from the engine to the sender and fill that with a medium as above. You can coil this piece of pipe if desired. If you are worried that in time the medium and the diesel could mix then drop some of the medium into some diesel and see which one floats. If the medium floats on the diesel then position the sender above the exit from the engine. If the diesel floats on top of the medium then position the sender lower than the exit from the engine. If you are using a coiled line positioned near the engine, hopefully cold weather will not cause any sluggishness as the heat will keep the medium from solidifying.<br>

 

Called today and ordered a Westach FP gauge, and the cup to mount it in. Will be here Friday, have it in Saturday.

 

I mounted mine about 18&quot; away from the engine with a grease gun hose. But that was just because the engine vibrations could damage the sender. Never heard about isolating it away from the fuel.