noisy air pump
Thread Starter
|
Posting Guru
Joined: Jun 2002
Posts: 1,288
Likes: 1
From: redding U.S.A.
noisy air pump
The air pump on my 300 makes a loud ticking noise when its idling. I assume it does it also when it isn't at idle, but the exhaust is too loud to tell.
I don't have any cats so i guess it isn't doing too much anyways, but is there a way to rebuild it, or make it an idler pully?
Its getting to be embarassing
I don't have any cats so i guess it isn't doing too much anyways, but is there a way to rebuild it, or make it an idler pully?
Its getting to be embarassing
Posting Guru
Joined: Dec 2002
Posts: 1,113
Likes: 0
From: Remsen, NY
Are you sure it's the air pump? Pull the belt off and rotate it by hand. Any roughness? The bearings can be replaced.
The pipe to the exhaust on mine broke and the truck only sees a few miles a year off the road so I pulled it off, opened it up, broke out all the fiberglass vanes and pieces connected so the only thing left was that drum and the bearings, welded the hose fittings shut with washers (low MIG setting), cleaned everything up really good and filled it with motor oil. I sealed the back cover with silicone and put it back together. Spins smooth now. Then I put it back on and found a shorter belt that skips it anyway (fan directly to alternator). Now if I have trouble with the belt for some reason I still have the older long belt in the truck and I can put it on over the gutted smog pump...
BTW, the old belt was 97 inches long with a 91 300 cube with no A/C, and the one I found that fit was an 81 inch one. An 80.5" one would have been perfect but Napa didn't have it.
The pipe to the exhaust on mine broke and the truck only sees a few miles a year off the road so I pulled it off, opened it up, broke out all the fiberglass vanes and pieces connected so the only thing left was that drum and the bearings, welded the hose fittings shut with washers (low MIG setting), cleaned everything up really good and filled it with motor oil. I sealed the back cover with silicone and put it back together. Spins smooth now. Then I put it back on and found a shorter belt that skips it anyway (fan directly to alternator). Now if I have trouble with the belt for some reason I still have the older long belt in the truck and I can put it on over the gutted smog pump...
BTW, the old belt was 97 inches long with a 91 300 cube with no A/C, and the one I found that fit was an 81 inch one. An 80.5" one would have been perfect but Napa didn't have it.
Elder User
Joined: Jul 2003
Posts: 997
Likes: 0
From: Weston, Nebraska
Just take it off, I did, but then agian mine has a carb. and I just plugged all the hoses that went to it or took them off. I'm not sure about fuel injection. Like he said though just take off the belt and see if it's that's problem.
Redneck-Cowboy
Redneck-Cowboy
Posting Guru
Joined: Dec 2002
Posts: 1,113
Likes: 0
From: Remsen, NY
My smog pump just blew into the exhaust after the O2 sensor so there's no way it could affect how it runs, even though it's EFI. It's a '91 with the stock speed-density injection. Others do have the air going into the head or in somewhere before the O2 sensors. These need the airpump to work to run right.
Thread Starter
|
Posting Guru
Joined: Jun 2002
Posts: 1,288
Likes: 1
From: redding U.S.A.
Yes, i can feel the tap in it if i just put my finger on it!
Maybe i'll tear into it later and sort of take off some of the blades (or whatever there is in there) so that it doesn't have such close tolerances in there.
I really don't know what the interals of the thing looks like but i'll find out soon!
Thanks for the replies.
Maybe i'll tear into it later and sort of take off some of the blades (or whatever there is in there) so that it doesn't have such close tolerances in there.
I really don't know what the interals of the thing looks like but i'll find out soon!
Thanks for the replies.
Posting Guru
Joined: Dec 2002
Posts: 1,113
Likes: 0
From: Remsen, NY
It's a '95, so it has a single serpentine belt for everything, so that's why the question about belt length. We just have to loop it around everything but the smog pump so it has to be a little shorter..
Trending Topics
New User
Joined: Oct 2003
Posts: 7
Likes: 0
From: IL
if this has anything to do with the same thing that we just went through on another in line 6 take the belt off and run a string arroung where u need it and hold on to it then take the string to Auto Zone and they can give u a belt that will fit we have done it on a 88 f150 and it worked ....this may not apply but it did for us.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Thread
Thread Starter
Forum
Replies
Last Post
Paulsf350sdcc
6.0L Power Stroke Diesel
23
Jul 21, 2014 08:40 AM
fordtrucklover94
1983 - 2012 Ranger & B-Series
16
Sep 16, 2004 10:42 AM