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  1. hatzie

    Timing and Dieseling

    Time to replace the balancer. A moving harmonic ring will not stay in the same place and it will eventually break your crankshaft. The 6.2 6.5L Diesels are very very bad about that. I used fluidampers as replacements on all my diesels. Be sure to get the right one for your engine and timing tab.
  2. hatzie

    Delay Wiper/steering column?

    The 1988-1994 T400 uses essentially the same column. Looks like the bowl has to come off.
  3. hatzie

    School me on 3 speed manuals

    Subaru had that feature in 1984. My 1984 GL two door hardtop had it. Nice feature on steep hills.
  4. hatzie

    Cylinder Head Decision?

    If you want to build a 383 look at how GM did it on the HT383 crate motors. GM used Cast Iron vortec heads, a stout 350 4-bolt roller cam block, standard 350 length 5.7" powdered metal rods, dished pistons, and a forged custom stroke crank. It makes the HP and torque numbers quoted on 87 octane...
  5. hatzie

    Timing and Dieseling

    If this was "rebuilt" by a previous owner lord knows what they actually did to it. I'd do the #1 TDC sanity check to be sure a 40 year old balancer doesn't have a freewheeling outer ring. How is the oil pressure on the "rebuilt" 305? The reason I ask. My grandfathers' last car before the...
  6. hatzie

    Adapt 4x4 Th350 in Place of 700r4

    I'd get the mating half and four cavity plugs to cover the connector. It's less than $5 in parts. It'll keep out the dirt and weather far better than any other solution. One Weatherpak 12015024 connector and four Delphi Packard 12010300 cavity seals. If you get a TH350C you'll need the...
  7. hatzie

    1973-1987 Ground Straps

    I try to tie the major chunks of the whole rig together to slow down corrosion. The battery to the alternator mount and the rad support. The rad support is not stock. I tie the Diesels battery grounds direct to the frame rails and depend on the Frame-to-Block straps to carry the starter...
  8. hatzie

    Replace rear leaf springs

    Along those lines... https://weaverspringbrake.com/ Says they've been in business since 1929. Standard Spring & Axle Company Inc on Hickory St just South of the Mixmaster.
  9. hatzie

    Replace rear leaf springs

    I'd just go to a local truck spring outfit. There should be more than one in the Dallas Ft Worth area. That Metro area is a large Intermodal freight hub. I remember seeing one in the industrial parks West of I-35 and North of 183 when I was doing work at DART in the late 1990's. Things are...
  10. hatzie

    Fuel Sending Unit

    That doesn't look like the innards of the 87-91 TBI tanks I put in my 1976 diesel project to get in-tank fuel pumps. Don't ask me to find the part number for the lift pumps I used. They are Walbro fuel-cell carburetor fuel pumps with 4-6PSI output. That's all I remember. Did they sell you a...
  11. hatzie

    Fuel Sending Unit

    Your lysdexia is showing... Easy to get this backwards. 1. Max Full needle is 90Ω resistance through the sender to the tank ground. 2. Empty needle happens when the circuit 30 wire is dead shorted to ground or 0Ω resistance through the sender to the tank ground. 3. Roughly 3:00 needle, well...
  12. hatzie

    TACH ON DIESEL MODEL TRUCK

    So there are 4K, 5K, 6K & 7K tachs... Plenty of variables in the wild. :D
  13. hatzie

    TACH ON DIESEL MODEL TRUCK

    GM showed what's inside the Tach filter cans in the 1983 wiring diagrams. 1- 100pF capacitor 1- 0.15μF capacitor 1- 5.6KΩ resistor 1- 10KΩ resistor The Caps don't note any polarity so I'd use Radial lead Poly caps rated for around 50vdc. You can use Electrolytics but why bother... the Poly...
  14. hatzie

    TACH ON DIESEL MODEL TRUCK

    I've seen 4K, 5K, & 7K tachs with several different red-lines. The diesels in the MD trucks redline around 3K-3.5K. Never looked at a Light duty diesel tach but they do exist. The actual meter movement is the same part. The circuit board determines how far the needle moves per rev. The...
  15. hatzie

    TACH ON DIESEL MODEL TRUCK

    The meter portion is the same on all of em... The Diesel PC board has different components for handling the AC waveform from the alternator. Wilcox Corvette used to have a replacement PC board for smallblock V8 HEI squarebody tachs. If they still sell it that's the easy way to re-vamp your...
  16. hatzie

    TACH ON DIESEL MODEL TRUCK

    They did come with a tach as an option even on the 350 Olds Diesel. The diesel tachs drive off pre-diode AC from the alternator. If it's a diesel tach it wont have the right calibration for V8 or I6. I've seen more medium duty squares with tachs on various diesels than light duty trucks. The...
  17. hatzie

    4WD INDICATOR LIGHT

    The old Delphi 12004215 wedge bulb socket for the lever light has been superseded by 12162711. Mouser Stocks this new lamp socket shell. The wedge lamp socket terminals are odd critters and they took a minute to find. Mouser stocks em. Delphi GM 12089661, 12089134, & 12089139
  18. hatzie

    4WD INDICATOR LIGHT

    Shouldn't be too difficult. The wedge socket is the sticky wicket but I bet you can find one in a salvage truck. I'd be tempted to see if the shift lever illumination bulb socket will latch onto the instrument panel. I bet those are easier to find.
  19. hatzie

    4WD INDICATOR LIGHT

    The answer is in the 1986 wiring diagrams... The below snapshots are from the left hand side of PDF page 15. GM switched the ground so they didn't use the traces on the printed circuit. If the transfer case switch doesn't have a short to ground in the open or closed positions you should be able...
  20. hatzie

    Got Rust?

    Dang. This is a rough crowd tonite...
  21. hatzie

    Electrical Supplies

    WireCare has some harder to find power distribution hardware. Stud strips, Buss Bars, Maxi-fuses, Crosslink Battery cable, and decent looking battery hookup parts. WhiteProducts.com has Delphi M3382 compliant fusible link wire. They also have Delphi terminal crimpers and an inexpensive "cost...
  22. hatzie

    84 Headlight buzzer install

    Those two connection points are Pak Con III plug sockets. The Pak Con III plugs are obsolete but you can still buy the terminals. IGN is an A socket that takes the Natural Pak Con 12004888 plug. LPS is a D socket that takes the Green Pak Con 12004885 plug. You can use a Packard 56 female...
  23. hatzie

    84 Headlight buzzer install

    If you download and look at the 1984 wiring diagrams the truck probably already has the buzzer. The ignition switch has an internal microswitch that closes contacts to ground when the key is inserted. The wire you need is a Light Green wire marked as Circuit 80 in the wiring diagrams. The...
  24. hatzie

    Electrical Supplies

    Mouser has a truly stupendous selection of Delphi Weatherpak, Metripack, Pak Con, Packard 56 & 59 terminals and connector shells. Look in the wiring diagrams for the connector shell part numbers. Most of the shells that are not obsolete can be had from Mouser. They also have most of the...
  25. hatzie

    New to me 86

    I posted my theory of operation for the Aux tank systems "RPO NL2" in the library sub-forum. Hopefully that's the right place for it and it's written clearly enough to demystify the Aux tank electrical operation...

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