Smog pump issue
Thread Starter
Intermediate
Joined: Aug 2010
Posts: 45
Likes: 0
Smog pump issue
I have a 1987 corvette with 65k on it. After getting sick of hearing the annoying whining sound coming somewhere from under the hood, I took a screw driver to the air pump and listened...and viola, the noise was definately coming from the smog pump. I went ahead and ordered an 87' air pump. This did not fit; the holes where the bolts go were much to small. After I thought about it, it kind of made sense, as 87' headlight motors did not fit my car either, I had to go up to an '88. So i ordered an '88 air pump, it looked like it was right, but the bolts were too big.
Im fed up with ordering smog pumps. Can i just take out the smog pump and get a shorter serpentine belt?
Im fed up with ordering smog pumps. Can i just take out the smog pump and get a shorter serpentine belt?
Racer
Joined: Nov 2010
Posts: 460
Likes: 1
From: Oliphant Ontario
Nope, seen it asked before, belt will rub on itself without that pulley holding it up that height. You still need to keep the existing route.
I had a noisy pump on an F body years ago, the insides are similer to an air tool motor with sliding vanes. If it's the vanes making the noise, just gut the pump. If it's a bearing then you may find it easiest to replace the bearing. Other wise there are "delete" kits that replace the smog pump with an idler pulley and a bracket to include the alternator though.
Greg
I had a noisy pump on an F body years ago, the insides are similer to an air tool motor with sliding vanes. If it's the vanes making the noise, just gut the pump. If it's a bearing then you may find it easiest to replace the bearing. Other wise there are "delete" kits that replace the smog pump with an idler pulley and a bracket to include the alternator though.
Greg
Le Mans Master
Joined: Feb 1999
Posts: 6,470
Likes: 2
From: levittown pa. usa Even a bad day with my `Vette, is better than a good day at work
St. Jude Donor '10
You can buy an air pump elimininator kit from a few of the vendors. Not cheap though, they range from around $149,00 to $279.00 
Thread Starter
Intermediate
Joined: Aug 2010
Posts: 45
Likes: 0
Nope, seen it asked before, belt will rub on itself without that pulley holding it up that height. You still need to keep the existing route.
I had a noisy pump on an F body years ago, the insides are similer to an air tool motor with sliding vanes. If it's the vanes making the noise, just gut the pump. If it's a bearing then you may find it easiest to replace the bearing. Other wise there are "delete" kits that replace the smog pump with an idler pulley and a bracket to include the alternator though.
Greg
I had a noisy pump on an F body years ago, the insides are similer to an air tool motor with sliding vanes. If it's the vanes making the noise, just gut the pump. If it's a bearing then you may find it easiest to replace the bearing. Other wise there are "delete" kits that replace the smog pump with an idler pulley and a bracket to include the alternator though.
Greg
Le Mans Master
Joined: Jan 2003
Posts: 5,858
Likes: 7
From: Santa Maria CA
Here's how to take your pump apart if you want to service it to make it whisper quiet.
http://forums.corvetteforum.com/c4-p...sassembly.html
Slingshot
Joined: Dec 2001
Posts: 3,817
Likes: 24
From: Charlotte NC
This fellow will rebuild it for you at a reasonable price if you are interested:
Bill Hodel
Corvette Snog Systems
330.832.0871
billhodel@sbcglobal.net
Bill Hodel
Corvette Snog Systems
330.832.0871
billhodel@sbcglobal.net
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Drifting
Joined: Oct 2003
Posts: 1,594
Likes: 0
From: CALGARY ab
I have a 1987 corvette with 65k on it. After getting sick of hearing the annoying whining sound coming somewhere from under the hood, I took a screw driver to the air pump and listened...and viola, the noise was definately coming from the smog pump. I went ahead and ordered an 87' air pump. This did not fit; the holes where the bolts go were much to small. After I thought about it, it kind of made sense, as 87' headlight motors did not fit my car either, I had to go up to an '88. So i ordered an '88 air pump, it looked like it was right, but the bolts were too big.
Im fed up with ordering smog pumps. Can i just take out the smog pump and get a shorter serpentine belt?
Im fed up with ordering smog pumps. Can i just take out the smog pump and get a shorter serpentine belt?
i have both : gently used air pump cheap or air eliminator .. email or send message for more info..search forums for "korvette4u" threads
Race Director
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
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Also, I don't think it was clear but there have been people who've successfully rerouted their setups w/o using an eliminator kit. Do a search and you'll see.
FWIW, when I went the eliminator route, I thought the factory belt was going to fit. Since I'd just bought the better, higher-priced belt, I subtracted that from the cost of the "non-eliminator-kit" route...then went that route. I don't remember if the adjustable rods are called "march" or something else,,,but there are rods that'll let you reposition your alternator where the non-eliminator option will work.
