Dave Barbieri
Full Access Member
This weekend I'm dragging home a 94 1ton Chevy diesel pickup. According to the PO, it's sat for three years, supposedly with a bad pump/PMD. I'll spend some time Saturday doing some troubleshooting to see what's really going on. I've spent the past two weeks reading this forum and looking at pump/PMD suppliers, and I've got a couple of questions.
First, how do I determine what pump actually goes on this truck? There seems to be a choice: 5068 or 5521. Looking at the existing pump won't help - the PO thinks it was swapped with 'something else'. Is there a chart somewhere? An identifier code on the options label? I'm kinda clueless here, so any help would be appreciated.
Second, what PMD relocation kits have you tried? There seems to be a choice here, also. Heath Diesel mounts the PMD on a simple aluminum plate bolted inside the front bumper, and runs a 6' extension harness back into the engine bay. They claim much lower operating temps and much greater reliability. S&S Diesel uses a large finned aluminum heatsink and mounts the PMD over the intake manifold inside the engine compartment. Despite engine heat, they claim their design is the best way to go. Any ideas on which system works better?
Third, any ideas on pump suppliers? I've used a pump shop here in east TX for the past 17 years. They do exceptional work. Never had to take anything back, and when they tweak a pump, the results are _seriously_ fun! A brand new pump from Stanadyne (with a 12 month warranty) is $1225. They don't handle rebuilt E-pumps. Has anybody had any experience with a rebuilt unit? If so, where'd you buy it, what did it cost, and how many miles do you have on it? I see a lot of interesting ads on various diesel parts webpages, but I've never done any business with these folks, so any input would be a real help.
Oh yeah, something else: How come this engine doesn't have any piston cooling jets? Not one single oil squirter to be seen! If you're gonna do any tweaking, how do you keep piston temps down? (inquiring minds wanna know....)
TIA for any input/suggestions/jokes.
Dave
First, how do I determine what pump actually goes on this truck? There seems to be a choice: 5068 or 5521. Looking at the existing pump won't help - the PO thinks it was swapped with 'something else'. Is there a chart somewhere? An identifier code on the options label? I'm kinda clueless here, so any help would be appreciated.
Second, what PMD relocation kits have you tried? There seems to be a choice here, also. Heath Diesel mounts the PMD on a simple aluminum plate bolted inside the front bumper, and runs a 6' extension harness back into the engine bay. They claim much lower operating temps and much greater reliability. S&S Diesel uses a large finned aluminum heatsink and mounts the PMD over the intake manifold inside the engine compartment. Despite engine heat, they claim their design is the best way to go. Any ideas on which system works better?
Third, any ideas on pump suppliers? I've used a pump shop here in east TX for the past 17 years. They do exceptional work. Never had to take anything back, and when they tweak a pump, the results are _seriously_ fun! A brand new pump from Stanadyne (with a 12 month warranty) is $1225. They don't handle rebuilt E-pumps. Has anybody had any experience with a rebuilt unit? If so, where'd you buy it, what did it cost, and how many miles do you have on it? I see a lot of interesting ads on various diesel parts webpages, but I've never done any business with these folks, so any input would be a real help.
Oh yeah, something else: How come this engine doesn't have any piston cooling jets? Not one single oil squirter to be seen! If you're gonna do any tweaking, how do you keep piston temps down? (inquiring minds wanna know....)
TIA for any input/suggestions/jokes.
Dave