V6 Discussion and questions about the base carbureted or MPFI V6's and the rare SFI Turbo V6.

What year did the 2.8 graduate to serpentine?

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Old May 2, 2003 | 08:57 PM
  #1  
BackInBlackGP's Avatar
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From: Vermont
Car: 1986 W69 Special Edition
Engine: 2.8/ECM/Int/Exh
Transmission: T5
Axle/Gears: 3.42 posi
What year did the 2.8 graduate to serpentine?

I saw a 3rd gen last fall that had a 2.8 with the single serpentine belt... Even some of the old S-10 2.8's have the single... Why is mine a v-belt? I've also noticed that there are a couple of 1986 engine parts tha do not fit my engine. Some of the 85 parts will. Did I get a leftover 1985 powerplant in my 86 SE???

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Old May 2, 2003 | 09:42 PM
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89V6FBIRD's Avatar
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From: UCIrvine or SFV, CA
Car: 1999 Pontiac Trans Am
Engine: LS1 - 346 ci
Transmission: 4L60E
1987 + got the serpentine, which I am truly glad I have, except for the fact that I had to replace the tensioner cuz it rattled. But it's SOOO easy to remove accessories w/ the seprentine!

The project T/A doesn't have serpentine though, I saw an 87 GTA and it STILL had V-belts... when did they change over?
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Old May 2, 2003 | 11:14 PM
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Project: 85 2.8 bird's Avatar
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From: BFE, MD
Car: 13 Ram 1500/ 78 Formy
Engine: 5.7 / 7.4
Transmission: 6sp / TH350
Axle/Gears: 3.55 posi / 3.23
85 birds had serp & v belt.
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Old May 3, 2003 | 12:07 AM
  #4  
AGood2.8's Avatar
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From: Mostly in water off So. Cal
Car: '87 Chev
Engine: 60*V6
Transmission: DY T700
My '87 RS Camaro has serpentine stock
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Old May 3, 2003 | 09:07 AM
  #5  
BackInBlackGP's Avatar
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From: Vermont
Car: 1986 W69 Special Edition
Engine: 2.8/ECM/Int/Exh
Transmission: T5
Axle/Gears: 3.42 posi
This is starting to prove my theory that I have a leftover 1985 engine... Hmmmm...

Does anyone else have an '86 Special Edition 'Bird that could take a peek under their hood for me???
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Old May 5, 2003 | 01:26 PM
  #6  
TomP's Avatar
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From: Central NJ, USA
Car: 1986 Firebird
Engine: 2.8 V6
Transmission: 700R4
Not sure why you think you have a leftover '85...? As was said, 1987 started the serpentine belt system.

82-84 used 3 v-belts.

85-86 used 2 v-belts and a serpentine-style belt for the alternator, but no tensioner is present.

What parts don't fit your car? My '86 motor looks just like yours, except you either have the a/c delete option, or you changed out the heater box and p/s pulley.
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Old May 5, 2003 | 09:40 PM
  #7  
BackInBlackGP's Avatar
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From: Vermont
Car: 1986 W69 Special Edition
Engine: 2.8/ECM/Int/Exh
Transmission: T5
Axle/Gears: 3.42 posi
At one point, I suspected the EGR valve was sticking because the car would randomly shut off when I put the clutch in. So, I procured a new EGR valve for a 1986 2.8... It didn't seem to fit right, and the gasket was different... I traded it in for a 1985 one, and it fit just fine...? (Possible wrong part? I have no idea...)

Turns out my coil was intermittant, so I returned the EGR valve back to the parts store and bought a coil instead...

Yes, I have the A/C delete option. I figure, who needs A/C with t-tops...? I also don't have the power locks option, either...

I can't remember, but there was another part that didn't seem to fit correctly, or couldn't be found on a 1986 parts list, or something that started me thinking a long time ago that the engine was old stock from '85...
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Old May 6, 2003 | 12:00 AM
  #8  
Project: 85 2.8 bird's Avatar
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From: BFE, MD
Car: 13 Ram 1500/ 78 Formy
Engine: 5.7 / 7.4
Transmission: 6sp / TH350
Axle/Gears: 3.55 posi / 3.23
not that it really matters, but my old 2.8 had 1 v-belt for the ps. serp for everything else. didi thise that had/hane a smog pump use v-belt too?
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Old May 21, 2003 | 09:59 PM
  #9  
MDv6man's Avatar
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Joined: Dec 2001
Posts: 1,282
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From: Elkton MD USA
Car: 1983, 1986
Engine: 2.8 2bbl, 2.8 MPFI
Transmission: 200C 3 speed, 700R4
Axle/Gears: 3.08, 3.42
Originally posted by TomP
Not sure why you think you have a leftover '85...? As was said, 1987 started the serpentine belt system.

82-84 used 3 v-belts.

85-86 used 2 v-belts and a serpentine-style belt for the alternator, but no tensioner is present.

What parts don't fit your car? My '86 motor looks just like yours, except you either have the a/c delete option, or you changed out the heater box and p/s pulley.
Actually, 82-84 had as many as 5 v-belts
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