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Don't use petroleum jelly. It's a bad habit. Silicone grease is is what should be used as it doesn't deteriorate EPDM rubber components. Internet cheapskates substituted petroleum jelly because it's also a clear grease but color isn't the only part of the story.

Hoo-boy. The HUEI Cat engines are good until they aren't. The repair costs are astronomical. They run forever for some and are nightmares for others. Clean, high quality oil is essential. The injectors are so expensive one failure will offset any savings running cheap oil. I would use a high...

I didn't mean to say we didn't have significant risk from failures of hard lines, just that one never caused the death of an engine. The above lube pipe failure I mentioned would dump 25-35 gallons of oil within an hour. It required a shutdown of the engine but didn't cause additional damage. I...

The problem with soft lines is that theyre difficult to specify. It's especially difficult for the average Joe to make the correct selection. The hose shops don't know, either. Back to the hard lines, I've never had one cause a failure of an engine, just shutdowns. Don't keep running it if it's...

I get the misfortune of racking up a lot of hours on a lot of engines. There are certainly locations that you're going to experience repeat failures. The Cats are especially prone to breaking hard lines. There have been a few cases where we solved problems using rubber hoses. Also know that Cat...

That small ground strap on the passenger side head is for the glow plugs. If you don't have it connected your brake hardlines from the master cylinder will start smoking during the glow plug cycle.

There nothing really wrong with that hose configuration. The key here is the hose material. You MUST use Parker 426 or Aeroquip FC234 or equivalent if you want longevity from the hose. These are high temperature rated hoses meant for on engine applications, they don't get stiff and brittle over...

Is it cycling and the light isn't coming on or is it not cycling at all?

Unit injector engines all have some type of back pressure control. The 71 series Detroits used a drilled orifice in the return line adapter fitting. Other engines may use an actual regulating valve. I think they used to call it an R80 fitting.

We had a defective run of aftermarket fuel filters on our John Deere 6081 engines. The metal housing would bottom out against the filter adapter before the rubber seal would compress. They would never leak outwardly but would admit air when the fuel level got low enough causing the engine to...

There are portal axle conversions for the 1-ton truck axles.

It gives the bolt a longer grip length. It makes it so the bolts are less likely to loosen or break. The grip length is the distance between the head of the bolt and the first engaged thread. The longer the grip length the less strain the bolt sees for any displacement that occurs. Think about...

The fuel pump is driven by the blower so this all goes back to the broken blower drive shaft mentioned by another user. Have you verified the blower is turning?

Your engine has a gear pump transfer pump and unit injectors. This system is very good at self-priming. You're chasing the wrong problem here. Heck, these Detroits don't even use pressure regulating valves. They have a simple orifice in the return manifold. If you've got fuel pressure you don't...

It's interesting if you consider what bearing manufacturers specialize in. SKF started with spherical roller bearings and ball bearings. Timken was tapered roller bearings. Torrington did needle bearings. Chicago Rawhide started rubber lip seals. There has been munch conglomeration since but...

I had to put Taiwan made rod bearings in my engine because so much is backordered. I was able to get OEM piston rings from eBay. I reused the old pistons.

If you have corrosion in the fuel filters you may have stuck injectors. Pull a valve cover (the gaskets are reusable) and verify the injectors aren't stuck down. You can also exercise the fuel rack. Any stuck injectors won't change position. If you do have stuck injectors all is not lost. I...

Yes, they're called stainless steel bolts. The terminals are lead, the lugs are copper, the bolts are stainless. You can't avoid a dissimilar metal combination. They key is to keep everything dry. If your battery starts blooming that blue stuff, it's time to replace the battery, it's leaking.

There are a few fundamental types of degreasers. Solvent, caustic, and enzyme. The solvent is the most likely to damage rubbers and plastics. There are a lot of different types of rubbers and plastics. Your wiring, for example, is either PVC or polyolefin plastic and is not likely harmed by...

If you're going to use dielectric grease on battery terminals it's best to coat the assembled connection with it. Galvanic corrosion doesn't simply occur due to contact by dissimilar metals, it requires an electrolyte to be present (salt water). If you can keep the galvanic couple dry you won't...