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  1. mtbadbob

    engine bay wiring- routing

    The tan wire looks like its the oil pressure sensor wire by the distributor, the green looks like a coolant temp sensor.
  2. mtbadbob

    Loud Knock After Replacing Intake Manifold

    Usually, a rod knock is more of hard ringing sound. That just doesn't sound like a deep enough knock to be a rod to me anyway. Did you pull spark plugs?? Could be part a plug in the cylinder.
  3. mtbadbob

    This makes 0 sense to me! Heater hose route

    Right, it won't flow until stat opens, but coolant is getting warmed sitting in the intake & engine before hand.
  4. mtbadbob

    This makes 0 sense to me! Heater hose route

    My '87 is like that only the connection is behind the TB and the Coolant Temp Sensor is where your hose connects to manifold. I'm assuming GM did that on the TBI's for a more accurate reading, the coolant having to travel further before it gets to the temp sensor.
  5. mtbadbob

    intro

    Welcome from MT! '87 is a good year!
  6. mtbadbob

    This makes 0 sense to me! Heater hose route

    On my '87 auto, the wp is plugged, no heater hose connects to it. I'm 99% sure it's factory.
  7. mtbadbob

    This makes 0 sense to me! Heater hose route

    That's EXACTLY what my '87 auto does, nothing off the water pump. My manifold fitting is behind the TB though, but I'm pretty sure that's original. Not t's or y's in my system whatsoever.
  8. mtbadbob

    Car hauler issues. How can I fix this. I dont know trailer parts.

    Cut off the foot, turn it 90 degrees, then weld it back on.
  9. mtbadbob

    GMC Grill

    I like being different than everyone else, so I used carbon fiber printed vinyl on the middle horizontal bar of my grille. It's subtle, but there when you look closely.
  10. mtbadbob

    GMC Grill

    They also have the best prices on the re-pop VINYL dash pads. Beat everyone by $50-$200 and they claim to make them themselves.
  11. mtbadbob

    GMC Grill

    Of course, I never considered the signal/marker light location into the equation! I love the look of our truck's grilles the best myself!
  12. mtbadbob

    Tach not registering

    I'd maybe send your tach to someone like Redline Gauge and have it tested, possibly repaired & recalibrated.
  13. mtbadbob

    GMC Grill

    Ad says Fast shipping!! Multiple distribution centers!! Also claims it should arrive in a week. It does say at the top of the page "This item is out of stock"
  14. mtbadbob

    GMC Grill

    Isn't that deciphered in the headlight bezels??
  15. mtbadbob

    What have you done to your square lately??

    Some of those carbs had a plug over the f/a screw that you had to drill and then pop out to get at the adjustment screw. I've seen that on a lot of motorcycles as well. In fact, I still have a little flat blade screwdriver bent at a 90 to adjust Harley carb's, as the fuel tanks stuck out so far...
  16. mtbadbob

    What have you done to your square lately??

    Sometimes the contact pin will rotate, free from the threaded body of the switch. I squirted mine with a little PB Blaster and rotated it by hand before I screwed the switch in. I'm not sure if the wire still twisted as I tightened the switch, but all is well with the interior lights when the...
  17. mtbadbob

    What have you done to your square lately??

    I just fixed my passenger side switch also. The switch was fairly new, but there was no wire attached. I disconnected the rubber wire grommet from the cab that goes to the door, then I was able to stick my fingers in there and grab the door switch wire that was bound up between the kick panel &...
  18. mtbadbob

    Changing from 80 square headlight back to 74-78 round headlight question.

    Yeah, all the adjuster mounting locations are different.
  19. mtbadbob

    bow tie for c10…

    You can make any of them work if you try hard enough. Dimensions are the key, along with how flat or angled they are. I did an '84 Monte SS clone and I used Trailblazer SS emblems on it on the doors & trunk lid. It looked classy, but not original.
  20. mtbadbob

    bow tie for c10…

    It looks like your grille has a recess for the factory bowtie. Dimensions would help, and you could probably make it work with some 3m tape. Some emblems were flat, some fit the recess. The changed them quite a bit over the years.
  21. mtbadbob

    This makes 0 sense to me! Heater hose route

    So, is there supposed to be a third nipple from the core for that line?
  22. mtbadbob

    Tach not registering

    Does that brown wire run right into the firewall? There's a good chance that the po removed the stock filter when he swapped the aftermarket tach. Now that you're re-installing the FT, a filter will more than likely make the tach work.
  23. mtbadbob

    Tach not registering

    I know when the filter fails, the tach stops working. Had to replace them on a Monte I had.
  24. mtbadbob

    Tach not registering

    A good connection might make a difference. A tach filter is the wire that usually runs from the distributor through a condenser looking thing that mounts to the firewall near the distributor, then continuing through the firewall to the tach. It usually has a rubber grommet that seals the hole...
  25. mtbadbob

    This makes 0 sense to me! Heater hose route

    Not sure what the line to rad is for, maybe it had a secondary return line for whatever reason.

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