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  1. C10MixMaster

    Fuel leak

    I would switch to a metal fuel filter, if the glass one cracks you can end up with a fire. Best guess on the wire is a hot wire for the electric choke. And if your running a pcv valve on the other valve cover then your sucking dirt through the engine because your missing the filter on this...
  2. C10MixMaster

    How do I know if I have HEI, and if I don't have it, should I upgrade

    To add to that. points wear and go out of adjust, needing to be readjusted or replaced. With HEI you set it and forget about it. I would switch to hei on any shock and mild built chevys
  3. C10MixMaster

    73-87 Battery Group size?

    the battery you are using has adapters on it with original side post cables. just get an original style side post battery and get rid of the adapters.
  4. C10MixMaster

    Proper spark plug gap?

    .035 for points distributor .045 on HEI . i have no problem bumping that to .060 on an HEI
  5. C10MixMaster

    heater box

  6. C10MixMaster

    Fuel Gauge

    sounds like a bad gauge. However check to make sure you have power and ground to the gauge before you replace it.
  7. C10MixMaster

    Help with instrument cluster - 77 K10

    looks closest to the 78-82 harnesses . when parts get mixed from different years these things happen. No telling exactly what the previous owner did and its possible there are others variations not on the table above. there are other wires not shown also, for example i believe one of the pink...
  8. C10MixMaster

    Starting issue

    Battery===Ignition switch===NSS===Starter Solenoid. Unless your in neutral or park the NSS prevent current from flowing to the starter.
  9. C10MixMaster

    Carb'd Vortec Upgrades

    I have been working on putting together a new motor for my truck to. comp cams has a listing of dyno runs and the key components used to get there. heres the link https://www.compcams.com/dyno-graphs unless the drag strip is where your gonna run your truck you might consider going for...
  10. C10MixMaster

    Help with instrument cluster - 77 K10

    The clusters from 73-91 all used the same connector they are just pinned different. If the oil gauge works the some one added wiring or replaced it with a newer harness. here's the pinouts for both. I would use the circuit board that matches the gauges These are real easy to repin..
  11. C10MixMaster

    Power window only goes up

    We use to spray wd40 into the switches and work back and forth a few times, it cleans them and sometimes they will start to work again. Both passenger window switches have to work for the passenger window to work.
  12. C10MixMaster

    Rust and water in cylinder

    for the most part the damage is done. A small amount of surface rust will rub off ( by turning the engine by hand) and blow out the exhaust (when the engine is running) for the most part, you might try compressed air and blow it out from the spark plug hole . Your other option is pull the head...
  13. C10MixMaster

    Rust and water in cylinder

    Pull the plugs . turn it over by hand to make sure the water is out of the cylinders. remove carb or pin the throttle open so any water in the manifold can evaporate. If your not ready to run it put some oil in the cylinders to prevent any additional rust.
  14. C10MixMaster

    Updated: Installing a compass/temp mirror in your truck

  15. C10MixMaster

    Fuel Gauge

    No sure on a jimmy but on the pickups there is a wire at the starter. its a weatherproof spade connector. It will be the single wire that runs to the back of the truck. disconnect it. Use an ohm meter to check the ohms on the wire to the tank. FUEL LEVEL GAUGE PARAMETERS For Truck Years...
  16. C10MixMaster

    Anyone know what these switches and vacuum lines do?

    the factory put 2 barrel carbs on 350's it could be the original setup. your vin or rpo codes could verify that. If your going to put a 4 barrel on remove the entire manifold and carb and put it on the shelf. You or a future owner may need to get it through emissions some day. and some of...
  17. C10MixMaster

    Heater/AC Question 1985 K-10

    You have a vacuum leak. Its defaulting to heater mode. check the hoses under the hood first.
  18. C10MixMaster

    Starting issue

    yes you can jump the neutral safety switch for testing. you can also bypass the start circuit and jumper from the solenoid start lead to the batt+
  19. C10MixMaster

    Accumulator?

    EDIT the switch on the acumulator would be a low pressure switch. I haven't seen an accumulator with 134 fittings. As far ar switches. there is a few ways to wire an A/C. On our 77's it cycles with an evaporator temp switch, there is a high pressure switch on the liquid line, there is NO low...
  20. C10MixMaster

    Turn signal issues

    you have a bad ground on one of the right side lights. since the ground is bad the electric current follows the parking light circuit and lights these bulbs looking for a ground.
  21. C10MixMaster

    What color is it?

    is there more to the RPO label that has a we wa code? i believe this is it and a link to the paint cross reference.. 1978 Chevrolet Chevy Truck Medium Graystone 17 B C WE6215 https://paintref.com/cgi-bin/colorcodedisplay.cgi?make=Chevrolet&year=1978&con=yk&model=Chevy%20Truck&rows=50
  22. C10MixMaster

    Starting issue

    well out of the blue something changed . The voltage load test will confirm the wiring is good. 2 gauge wires should be perfect for your truck. Another thing is to verify is your ground is to the engine not the frame.
  23. C10MixMaster

    Starting issue

    Checking ohms is good but doesn't show conditions under load. To test these circuits use a volt meter, put one lead on the battery + post on the lead part, put the other lead on the starter terminal lug. Have an assistant crank the truck. It should show little to no voltage, less than .1...
  24. C10MixMaster

    Rear Drums Rubbing on Backing Plates after New Wheels

    Check the clearance between the drum and wheel it should only touch at the flange and not the edge of the drum.. Might need a spacer between the drum and the wheel. carrier and axle bearings should have 0 effect. wrong axle? Axle length too short? Backing plate bent? If you change to...
  25. C10MixMaster

    Play in steering box at normal operating temp.

    there is a high spot on the worm gear so when the steering shaft is at the center of travel it will be stiffer. when its to tight as you turn the steering shaft you can feel it.. that's home.

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