Deleting Smog Pump Need Belt Size
12-26-2006, 04:02 PM
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Car: 1989 Pontiac GTA
Engine: 350 5.7 T.P.I.
Transmission: TH 700-R4
Axle/Gears: 3.27
Deleting Smog Pump Need Belt Size
I have a 1989 Firebird with 350 tpi. And i was wondering why do i need a longer belt(986k6) if i am taking my smog pump off. Do i need a longer belt or shorter and i did read the tech article and iam confused.
12-26-2006, 06:04 PM
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Car: 92 Camaro RS
Engine: 305 TBI
Transmission: T-5
It takes a longer belt, I have a under drive crank pulley and I centered the tensioner in it's travel and used a piece of string to get me close on the length. And I still had to make about 4 trips back and forth to the parts place before I got the right one, 1" length makes a big difference, seems like I ended up with about a 94" or 95" belt.
12-26-2006, 07:48 PM
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Car: 1989 Pontiac GTA
Engine: 350 5.7 T.P.I.
Transmission: TH 700-R4
Axle/Gears: 3.27
Thanks man but iam still confused if i should buy a shorter one, like a 93.5 because wouldnt it make sense to do that since iam taking a pulley off. I know you have to route the belt a different way and did get off this website. Under crank over water under power steering over alternator and finally over the a/c compressor. If this correct maybe iam getting somewhere. As this demonstrates. But, the tech article says i need a 98.6. 
Last edited by kuulkatdadieo; 12-26-2006 at 07:52 PM.
12-26-2006, 09:02 PM
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Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
The difference in the length is because you are changing the routing, and thus changing the length. Without the SP, the belt wraps differently, taking a longer path.
HOWEVER - I found that with mine, I needed an entirely different size than was listed in the tech article. You'll have to play with a few maybe to get your desired length, routing, and tension.
HOWEVER - I found that with mine, I needed an entirely different size than was listed in the tech article. You'll have to play with a few maybe to get your desired length, routing, and tension.
12-26-2006, 09:13 PM
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Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
I have removed the smog pump on my 89 RS, the belt # for gates is K060980, i had to re route the belt of course.
12-26-2006, 09:26 PM
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Car: 1989 Pontiac GTA
Engine: 350 5.7 T.P.I.
Transmission: TH 700-R4
Axle/Gears: 3.27
Thanks i found out that the belt you list is 98 5/8 in. long. Which is close to the tech articles 98.6 in. If your 89 RS has a 350 then it should be a perfect match, correct?
12-26-2006, 09:29 PM
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Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
I have a 383 with carb, was tbi, I believe the serp system is the same as tpi that i know of.
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12-27-2006, 05:34 PM
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Car: 1989 Pontiac GTA
Engine: 350 5.7 T.P.I.
Transmission: TH 700-R4
Axle/Gears: 3.27
Thanks man i just picked up a belt that is 96.7 in. at AutoZone and i will give a shot tomorrow and i will let you guys know how it turns out.
12-28-2006, 01:00 PM
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Car: 1989 Pontiac GTA
Engine: 350 5.7 T.P.I.
Transmission: TH 700-R4
Axle/Gears: 3.27
I tried to take the pulley off, but one of the three bolts is stuck and it wont come out so i just installed everything back on i guess i will have to live with my smog pump. I left the belt on and tried to take the bolt out but their isnt enough tension on the pulley to keep it still. Any suggestions would be great.
12-28-2006, 07:57 PM
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Car: 92 Camaro RS
Engine: 305 TBI
Transmission: T-5
Wait untill the pump locks up tight and melts a belt into, then the pulley will be tight and the screws will come out easy. Thats what happened to me anyway. Or find a big strap wrench to hold the pulley.
12-29-2006, 02:28 PM
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Car: 1989 Pontiac GTA
Engine: 350 5.7 T.P.I.
Transmission: TH 700-R4
Axle/Gears: 3.27
Thanks guys i finally got the dumb@#$ thing off. I was about to strip out those Torx bolts but i hammered my Torx socket in it and finally got it off man im i lucky that could have been really bad. Why does GM have to use those dumb star bolts they really **** me off. Anyways thanks and should find a right belt for that thing as 98.6 was too long and 96 was too short im going to hit right in the middle. THANKS and HAPPY HOLIDAYS
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