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86 GMC C2500 - Heater blows hot, then cold, then hot, then cold etc.
Even the a/c trucks had cable actuated blend doors so vacuum or lack there of makes no difference on temp. Just location. Ben- Itali83
- Post #9
- Forum: Electrical & Audio
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Old truck Patina
This is my favorite pic of the 76 as far as patina, dirt, working truck pictures go. -
Old truck Patina
Here’s a few from my fleet. The ‘76 was supposedly gone through 25ish years ago but before it was finished, the owner got sick and it got put in the barn where it sat for those 25 years. Then I bought it. I’ve gone through it mechanically but done nothing about the patina. And don’t plan to... -
Capacitor looking thing for 1976 blower motor
Ok that’s what I figured. I’ll just clip it off and bypass it. No radio in this rig. Don’t want to loose heat in a plow/winter time rig. Was cold enough last Friday when I left work at it was -15*F without the windchill. Thankfully back in the 20-30’s this week. Ben -
Capacitor looking thing for 1976 blower motor
Anyone know exactly what the capacitor looking this is under the hood, on the firewall, on the wire going to the blower motor positive? It’s between the resistor and the blower motor itself. Non-a/c truck. Definitely a factory piece. I’m thinking it’s a capacitor for radio noise. Mine is getting... -
6.5 turbo swap
Compression does matter or make a difference when it comes to how much fuel/boost I want to feed it and how much fuel timing I can run. The old NTC Cummins used to be around 14:1 compression and 220 hp. When they started to turbo them and push for the 350 hp, they had to lover compression to...- Itali83
- Post #5
- Forum: Diesel 6.2, Conversions Cummins, etc.
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6.5 turbo swap
No a/c on this truck and exhaust fabrication will be no problem. If the bottom end of the 6.5 is good, I’m going to run that which was originally a turbo motor so should be good. If not, I’ll put the thicker 6.5 head gaskets on the 6.2 to help lower the compression a touch for the added turbo...- Itali83
- Post #3
- Forum: Diesel 6.2, Conversions Cummins, etc.
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6.5 turbo swap
Figure I’ll start a slow and long build thread for my new project. I’ve been daily driving my ‘76 K25 for over a year and the fuel mileage is just killing me. 6-8 mpg depending on how much warm up time or plowing in the winter etc. it’s getting old. I know it’s a complete package combination...- Itali83
- Thread
- Replies: 7
- Forum: Diesel 6.2, Conversions Cummins, etc.
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Best Door Hinge Lubricant
I use fluid film on pretty much everything. Clings and creeps very well.- Itali83
- Post #11
- Forum: Tech Discussion
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Rally wheel tire size preference? (2wd)
275/60-15 on 8” wide in the rear and 255/70-15 on 7” wide in the front. The fronts are a touch taller than the rear which bugs me but couldn’t get a 255/65 so it is what it is. Luckily since the rear wheel openings are lower than the fronts, unless you know it and stare hard, you can’t tell. It... -
Problem solved
It’s hard on the internet. But I wanted to really convey the point that for sure, no questions asked, without a doubt, reverse flow for square bodies wasn’t until ‘89. Period. Carry on, I’ll be here all night folks Ben -
Problem solved
‘87 and ‘88. Did NOT have reverse flow water pumps, period. They did have a serpentine belt for the water pump only but still had the alternator adjustment for that belt. It wasn’t until ‘89 that they went to the single serpentine belt for all accessories that the water pump is reverse flow. I... -
Problem solved
Only thing that comes to mind is that maybe the intake manifold gaskets are installed wrong and blocking the port to the intake. I didn’t think that could be done until the ‘87 Jimmy had them installed backwards by the previous owner. I had slightly different symptoms but something has to be... -
Gearing for performance TH700R4 + 3.73 ?
You’re in the right track with your thinking about doing gearing and trans mods over a built 350/383 etc. I’m playing devils advocate and saying go 4.10’s. The overdrive and your overall driving style/needs (not much Highway or high speeds) I think the 4.10’s will just really give you the kick...- Itali83
- Post #10
- Forum: Transmission & Transfer Case
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Goodwrench crate engine smoking from passenger side exhaust
I really gave the last truck with a quad my best effort to save it. After fiddling around with it, taking it apart, cleaning, got a rebuild kit, still couldn’t even get it to yard drive. I junked it and bought a trusty holley. Been driving it for over a year no problems. I’d like to master a...- Itali83
- Post #19
- Forum: Engine & Performance
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1979 Big 10 Engine & Transmission Upgrade
Very nice! I’ll be following too. I dream of building a serious drag truck from a square body too. I’d like to see how/what you do with the truck itself to get you to that goal. Ben- Itali83
- Post #9
- Forum: Engine & Performance
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Electrical Issue No Power When Keyed On
There’s one down by the starter. There’s two (on my 87 anyway) just above the rear of the left valve cover. On their way to the junction block on the firewall. Then there’s one off the alternator power wire that goes to the junction block. It’s by the front/mid right side valve cover where the...- Itali83
- Post #7
- Forum: Electrical & Audio
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Electrical Issue No Power When Keyed On
Clean the positive contact on the starter. Power comes from the battery to the starter then to the cab. Had a very similar situation with my 87 and ended up being a little corrosion there. Cleaned it and worked perfectly. Ben- Itali83
- Post #5
- Forum: Electrical & Audio
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What have you done to your square lately??
If you take your time, pretty dang straight. Here it is at zero and almost 3,000 later. Still straight. -
Pull 6.2 and 700r4 as a unit?
With the radiator core support out, I don’t see why it wouldn’t come out as a unit. Just make sure your crane is up for the job. The 6.2 is much heavier than a 350. Ben- Itali83
- Post #3
- Forum: Engine & Performance
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What have you done to your square lately??
Believe it or not, but that alternator connection you took a picture of is about the best looking connection. That’s just old dielectric grease on the terminal. Which keeps corrosion away. And it’s done a fantastic job there. The metal has no corrosion. If the connector was green or black then... -
What have you done to your square lately??
Put the “new” seat in with the new seat cover. Will hopefully help with the 0 degree or below mornings going to work. The old vinyl seat was rough to sit on, especially with a non insulated cab with plenty of drafts and the old heater motor that barely blew anything. This winter will hopefully... -
1976 windshield washer pump rebuild kit
What I actually did because the mechanical aspect of the original pump made me smile and how it literally pumps the fluid on the windshield instead of a solid spray. I used the newer electric pump as a transfer pump so a quick hit of the button feeds washer fluid to the original pump which then...- Itali83
- Post #16
- Forum: Tech Discussion
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1976 windshield washer pump rebuild kit
Took the reservoir from one of my 81-87 parts trucks with the electric pump in the tank and ran my washer motor wires to it. The new kit didn’t work to fix the tired mechanical pump and I needed windshield washers badly. Ben- Itali83
- Post #14
- Forum: Tech Discussion
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What have you done to your square lately??
Fixed the wiring to tail lights on the bed. Also installed these window vent shades that I’d never install on a nice truck because of drilling holes in the door. But on this old blister with aftermarket doors, I had no regrets. Think it looks the part with them on for sure. Ben
