- Thread starter SVcummins
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Janicholson
Well-known Member
I just removed 2 of those nasty widow maker rims from My GMC. Replaced with American Racing Aluminum for 130 each. I don't wanna watch air going in that rim. Jim
OregonAaron
Member
That thing will haul a$$ with that crome air filter! Just kidding, I have the same on on my old ford. I just think it's funny, same as yours my old ford has a "well loved" looking engine and the only shiny thing is that air filter! When I was buying the air filters the chrome ones were the cheapest!
rustred
Well-known Member
that must be just putzing around. should be double that or more on the road with that rochester carb. i got a 1972 here with the 366 and can see the gas gauge dropping when driving . lol. it has the 4v holly carb and i put a kit in it as it was leaking all over and thought might catch fire. i thought it was doing 4-5 mpg.
fastfarmall
Well-known Member
I was in a tire shop when one ring came off,about 3 stalls down, it sounded like a 10 gauge shotgun, or worse,it was in the cage thankfully, but i couldn't believe the dirt and dust, it was about 10:00in the morning, the attendant had to go home and change clothes!!!
WAYNE-N-TEXAS
Member
Those V6's likes the taste of gas. I have a'64 GMC pickup with the V6. It thinks gas is 25 cent a gallon.
Steve@Advance
Well-known Member
Would be surprised if the power valve isn't dumping gas down the intake.
Gene Davis (Ga.)
Well-known Member
Tire shops around here won't touch them!
caterpillar guy
Well-known Member
I guess I have been living a charmed life on tire work. I still work on those wheels yet. Never have had one blow apart on me. I'm not dead yet either so still time.
The Big Block GMC V-6's have a website all their own, "'60-'66 GMC V-6". Lots of info on them and the trucks they were used in. There were several engines in the 400 cid range, a 401, 432, and probably the most popular BIG engine was 478 cid. They, gasoline engine trucks were really popular back in the 1950's and '60's, even into the '70's. Livestock trucking companies tended to use gas engine trucks & tractors because older farmers believed diesel exhaust hurt the quality of the meat on the way to the processing plant. I spent a LOT of time riding Shotgun in GMC V-6 powered livestock semi's or IH CO-190's with 450 cid 6's. There was a BIG livestock trucking company out of Litchfield, Illinois that every Sunday night would have over a dozen semi's at the Chicago Stockyards, mostly gasoline powered FORD's, their Super-Duty gas truck engines seemed to run the best, 401, 477, & 534 cid, 226, 253, & 266 hp.
Hobo,NC
Well-known Member
- Location
- Sanford, NC
The next time you need a filter look for a 3/4" the same diameter. Those open 2" get restricted fast and cause a problem that's hard to find... BTDT
As daring as some GM divisions were I think GMC was probably the single most daring. They played with the patterns for the cylinder block castings, and the ceankshaft forging, made a "Twin-Six V-12, two 351's, four cylinder heads, two distributors, two carbs, 702 cid. I frequent poster on that GMC V-6 forum who only lives a couple miles from me has a Custom 1500 GMC short box, but very VERY long nose pickup with a V-12 under the hood. His other truck is the steel tilt cab, my favorite color, IH red, also V-12 powered. Seemed like every local livestock hauler had a GMC or 2,3, or more. And nobody had a V-12, but lots of 478's. The other interesting engine was the 637 cid 60 degree cylinder bank angle V-8 that replaced the V-12. The LARGEST displacement V-8 GM ever put in a new vehicle for sale. Guys on that forum that drove them they got 2 mpg empty, less when loaded. Also GMC built the tall Crackerbox tiltcab, all aluminum cab, and for a while they built an all aluminum truck, frames, frt axle, as much of the suspension as they could. I'm personally not a fan of the Detroit w cycle diesel engines, and I've driven them enough to know that noisey thing tires you out on 10-12 hour or more days. I can run a Cummins twice as long without getting tired as I can a Detroit. And if you have a Detroit that's not leaking oil, that means it's out of oil!
Now, for the FORD FANS, look up the "Ford GAA V8 engine". Ford wanted to build a 1650 cid all aluminum V-12 aircraft engine for US built fighter planes. The V-12 never really found a market, but a V-8 based off the V-12 was used in the Sherman tank. Lots of them. So how does a 1100 cid all aluminum double over-head cam V-8 sound?
Now, for the FORD FANS, look up the "Ford GAA V8 engine". Ford wanted to build a 1650 cid all aluminum V-12 aircraft engine for US built fighter planes. The V-12 never really found a market, but a V-8 based off the V-12 was used in the Sherman tank. Lots of them. So how does a 1100 cid all aluminum double over-head cam V-8 sound?
David from Kansas
Well-known Member
About the chrome air cleaner; the original air cleaner on the GMC V6 was an oil bath cleaner, at least that is what my '65 GMC 4000 with the 305 CI V6 had on it. I replaced it with a dry type cleaner. Almost burned it up once during wheat harvest when the oil bath had been removed to adjust the points or some such thing and didn't get secured to the carb. While driving down the road my younger brother smelled smoke, stopped and the oil bath had fallen off on top of the engine and oil was running onto the exhaust manifold. Fortunately, he was able to get everything under control without any damage.
Sv, you should be getting much better mileage than that. Check your post from the other day for timing and advance checks. Quick check for mechanical advance pull cap, turn rotor, release, it should spring back. For vacum advance, raise window on cap, set rpm about 2000, disconnect hose from vacum advance, you should see breaker plate move back clockwise. Reconnect hose breaker plate should turn counter clockwise. Mechanical advance will affect power and mileage. Vacum advance will mileage. It's best to test them with timing light.
And therein lies the issue.
Those inner surfaces get bent & corroded, If ya take a good look at one there is not much keeps them together.
I have not touched one in over 30 years but it seems like the 3 dots have to lined up also.
At least with a lock ring style you can be sure it is seated & the bead retains it.
Janicholson
Well-known Member
I deflated one of the two I took off and got the rim apart by cutting the tire bead around both sidewalls, I then had enough flex to drive the inner
flange down on the outer enough to pound the rust off of the interlock. The pry slots and tipping slots were so rusted that when the rust was removed,
the inner 1/2 came off pretty easy. I pounded on the rust for 2 hours with a 2 pound mini sledge. They will be sold as scrap as soon as I get the
other tire off. I removed the rubber from two other locking ring rims 14 ply rated Michelin 750 17s. That was very easy. lock ring off in 2 minutes, a
few taps with the hammer, and pull off the outer flange. Jim
flange down on the outer enough to pound the rust off of the interlock. The pry slots and tipping slots were so rusted that when the rust was removed,
the inner 1/2 came off pretty easy. I pounded on the rust for 2 hours with a 2 pound mini sledge. They will be sold as scrap as soon as I get the
other tire off. I removed the rubber from two other locking ring rims 14 ply rated Michelin 750 17s. That was very easy. lock ring off in 2 minutes, a
few taps with the hammer, and pull off the outer flange. Jim
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