Air Injection Pump?

fan clutch

stuck 'on'

been there, done that on my 84 Dodge w. 360

Gary Glaenzer wrote:

I'll definitely check that. I have a spare right here. Makes sense, but it wasn't making that "B29" sound that should come from having the fan spin at 2500 RPM.

Thanks.

-Tim

That must be one hell of a fan you got on that thing Gary! You didn't borrow it off the front of a Cessna did you? LOL! Did you even have the truck in gear, or was the fan pulling you that fast? Bob

Possibly the cat plugged, the squeal could be something else not related. Seams if it was something belt driven that 454 would smoke that belt right off in a hurry.

seizing water pump, air pump, alternator? emergency brake cable sticking/not releasing properly? plugged exhaust? no oil in rear diff/axle? poltergiests? gremlins?

I had a chevy v6 that shreiked only under very heavy acceleration, turned out my exhast was plugged,the squeal was the gasses escaping wherever elst the could, maifold gaskets etc.

Curious, let us know what you find out.

I just went out and stuck my head under the hood and gunned it a few times to see where the noises are coming from. At first I thought AHA it IS the fan clutch, because the fan was going like crazy, but then the clutch warmed up and kicked out. Oh yea, it always does that when you first start it.

Sounds like there is an unusual growling noise coming from the air pump, and the belt squeak is coming from that area, but its hard to tell exactly from where. The exhaust seems to be flowing OK.

Thanks.

-Tim

Nothing like a belt squeal but the poster might not know any better....

It's easy to just loosen the tensioner and drop the belt off, then try all the accesories to see if any are siezed.

Not a chev but here is my $0.02

When my mother first got her Buick skylark, it had been driven by a little old hag who never used it for anyth>

Well, I just spent a couple of hours working on it. Changed the fan clutch and took the air pump apart. Its a little worse for 15 years and

I'm starting to like the clogged cat theory. I might *not* know better, that squeak is starting to sound more and more like a whistle. As a matter of fact on one test trip up and down the street I could make it jump up and down an octave by giving it more or less gas, so it could be the exhaust manifold gasket acting like a sax reed.

And the loading is definitely a function of power requirement, not rpms. I live on a steep hill and I can go zipping down the hill at 45 mph but I can barely get back up at 20.

I guess tomorrow I'll crawl underneath and stare blankly at the cat. Maybe if I whack it with a hammer.

Yep, that sure sounds like its the cat.....

Doesn't hurt to look over the entire pipe. Could be crushed or kinked in a spot.

I recently chopped off my entire exhaust system, cat included ! ( it was totaly hooped) I left the crossover , but removed all else. I mounted a small turbo muffler directly to the crossover, and made a pipe to run out to the side of my van. it works, and sounds so nice now, and it cost me all of five bucks to build from spare pipes and parts i had layin around. (i had access to a welder.)

My cat was plugged up before that, but all the holes in the rusty pipe were letting the exhaust flow at least, lol

So there is what looks to be a "blow-plug" near the intake side of the cat. I tapped on the cat with a rubber mallet and big gobs of fiberglass looking stuff came pooffing out around the edges of the plug. I quit while I was alive in case it was asbestos. Guess I have to find a muffler shop.

Re: Air Injection Pump? From: snipped-for-privacy@spammers.ca (Buzz=A0Lightbeer)

Replace the cat with a straight piece of pipe.

and help put the world out of it's misery.

fool!

Earnest T Bass

Cut it out and put in an aftermarket high-flow cat. Never heard of asbestos in a cat tho....... just use a flame cutter or brute force and rip it apart. You'll have some extra 454 stompin power if you put in a high-flow. If your still worried about the fiberglass stuff, don't take the cat apart.

another enviromentally challenged poster

scrib ...... Re: Air Injection Pump? Group: alt.trucks.chevy Date: Sat, Oct 4, 2003, 4:01pm (CDT+5) From: snipped-for-privacy@spammers.ca (Buzz=A0Lightbeer) I recently chopped off my entire exhaust system, cat included ! ( it was totaly hooped) I left the crossover , but removed all else. I mounted a small turbo muffler directly to the crossover, and made a pipe to run out to the side of my van. it works, and sounds so nice now, and it cost me all of five bucks to build from spare pipes and parts i had layin around. (i had access to a welder.) My cat was plugged up before that, but all the holes in the rusty pipe were letting the exhaust flow at least, lol Now it runs so much better. with no cat and less than 2 feet of pipe after the small turbo muffler. sounds good, looks trick with the side dump. has power again too !

Tell that to all the huge american factories that spew acid into the atmosphere. go clean them up before you gripe about my missin cat.

another enviromentally challenged poster

scrib ......

Re: Air Injection Pump?

Group: alt.trucks.chevy Date: Sat, Oct 4, 2003, 4:01pm (CDT+5) From: snipped-for-privacy@spammers.ca (Buzz Lightbeer) I recently chopped off my entire exhaust system, cat included ! ( it was totaly hooped) I left the crossover , but removed all else. I mounted a small turbo muffler directly to the crossover, and made a pipe to run out to the side of my van. it works, and sounds so nice now, and it cost me all of five bucks to build from spare pipes and parts i had layin around. (i had access to a welder.) My cat was plugged up before that, but all the holes in the rusty pipe were letting the exhaust flow at least, lol Now it runs so much better. with no cat and less than 2 feet of pipe after the small turbo muffler. sounds good, looks trick with the side dump. has power again too !