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Snap On never sold a timing light adapter for diesels. Mac and Ferret did. Snap On MT480 uses a luminosity probe and "sees" the start of ignitlon. GM Kent Moore and Ford Rotunda had something similar. Mac and Ferret sold the diesel timing light adapter. My Ferret #765 cost me around $100 five...

Timing problems are not easy to diagnose on 6.2s with common tools. Stanadyne pumps used on some heavy equipment can be run with degreed plastic timing windows bolted to them when running - and that makes checking timing advance easy. No good with a 6.2. Easiest way I know of to verify if the...

Are you talking about Boschs for 12 volt system use or 24 volt system use? Civilian type 12 volt systems originally used 6 volt glow plugs (like 9G Delcos) and military 24 volt systems use 11 volt plugs (like 13G Delcos). I like the Wellmans/WAPs for a 12 volt glow-system. GO50s. They've...

Plastic. Many if not most of the bigger high-amp relays have plastic external housings - just like the high-amp relay enclosure on the 6.2 OEM starter-motor. Note I'm using the word "plastic" as a general term. I assume it's actually some sort of high strength phenolic or Bakelite. Whatever...

Yes if a tip tears off, burns off, or blows off - it can make a mess. That being said, the OTC tool helps with some of the bad ones and sometimes will make the difference of getting out a stuck plug in one piece that otherwise would have busted apart. With some of those plugs it's near...

Twisting and pulling- carefully. For the real bad ones - OTC and Navistar make a good tool for getting them out. Not quite worth buying one for $80 unless you do this full-time. Works nice though if you can borrow one.

I have no idea what is, or is not wrong with your pump. Generally speaking, the automatic timing advance in the DB2 pump is the first system to wear inside the pump and stop working. it's the reason why the military installed "Arctic Kits" in some of the pumps trying to make the timing-advance...

The HD relay for $19 that I posted IS a Trombetta - model 684-1221-012 It's used in many HD applications including Western snowplows with electric-hydraulic pumps. For $19, it's a reallly good buy. The Trombetta you posted has slightly less amp capacity then the one I posted. The 976-1211-010...

Looks similar to the OEM insulation blanket used on Civilian 6.3 diesel rigs. I wonder if it's any more mouse resistant? Mice love the factory insulation and have ripped it all out of all my 6.2 rigs. They never touch the insulation hood blankets in my Ford diesels, so I assume Ford's using...

8%-=10% is an standard average figure/range for a properly working torque-converter. It's going to vary with load, speed, wind resistance, etc. Easiest enough to check if a vehicle has a tach. I've got a Blazer and a Suburban with 6.2 diesels, tachs, and 4L60s. Both slip about the same...

The ST85 is a continuous-duty relay. Nothing about it makes it particulary good for glow-plug use. It is rated at a max of 80 amps. It cost more for two reasons. #1 - because it's at NAPA. #2 because it's a low-draw relay meant for full-time use, not just momentary. They are often used...

4L80E is the lockup-overdrive version of the TH400. Very rugged. Problem is the size of it and the expense to install it. You'd have to get an aftermarket electronic controller which is very expensive. Or if lucky might find a stand-alone transmission controller GM used in the first couple...

I assume you're in the flatlands of the lower P of Michigan? I own several properties in northern Michigan just below the Mac Bridge. All my diesel trucks get 2 MPG better there (as compared to the mountains of New York). I had my 94 Ford F250 turbo-diesel here in NY for 10 years and 15 was...

3.73s are nice until you have to travel a fast highway somewhere. I drove an 87 3/4 ton diesel Suburban for years. 3.73 axles and the TH400 trans. No overdrive and 10-15% torque-converter slippage at cruising speed instead of lockup. I got used to the noise and hardly noticed at speeds of 65...

What kind of junk was in that regulator valve? If you found tiny little pieces of black rubber, you've got a broken weight retainer ring. They were only use in pumps from 1982 to early 1986. After that, the plastic was eliminated. As far as a "bad" pump making an engine hard to time? That...

Top of pump gets pushed towards the driver's side of the vehicle to advance. To turn up fuel, you have to tigthen the screw -which is clockwise.

6.2 is most efficent within the 1800-2100 RPM range. Actual fuel mileage is going to vary depending on how hard the engine has to work on hills, and with altitude you're driving in. I've got over 20 diesel Blazers and trucks with all sorts of combinations of gearing. One example is my...

Timing isn't really any different between civilian and military. Timing properly can be very confusing on any diesel. With a gas engine, spark travels at the speed of light. So, time of spark at the distributor is the same as at the plug wire, and at the spark plug. A diesel must send...

Front uses a Spicer 1310 joint at the pinon flange. CV joint at the rear where the driveshaft bolts to the transfercase flange. You don't want to attempt to put a new CV joint in unless you've got a lot of experience. They're not easy. By the way, the OEM new pinion yoke for your rear is...