Serpentine belt

[Ram Air TTA]

Guys,
Just thought I would pass this info on.

1. #25-060623 1595mm or 62 7/8" long

2. #25-060630 1615mm or 63 5/8" long

3. #25-060640 1625mm or 64" long

These are NAPA part#s hope this helps out. My car #1126 takes the 1595mm belt. From what I have found the parts books seem to say that the GN belt and TTA belt is the same but we all know that is not the case. Good luck, any questions let me know.

 

[pacecarta]

thanks for the part #s and source

im new to the v6 scene with a stock 87 GN that i got in fall
spring is coming (its snowing now) and want to concentrate on the GN ,
i replaced the belt with a pepboys belt when i got the car just for peace of mind and to have a spare . i noticed it looked a bit larger than one that came off , i dont have many miles on it and recently noticed it just isnt tight enough (may have stretched a little more)
tensior works fine but seems to be close to its travel limit
thought maybe one of my accessory pulleys were smaller (possibly alternator which is same size as my LT1 )
on the tech forum the the existance of smaller GY gatorback 63.5 (606035)
belt for the GN was brought up last night , i ordered one online , if that doesnt cut it ill try the smaller 62 7/8 belt

 

[Razor]

Originally posted by Ram Air TTA
Guys,
Just thought I would pass this info on.

1. #25-060623 1595mm or 62 7/8" long

2. #25-060630 1615mm or 63 5/8" long

3. #25-060640 1625mm or 64" long

These are NAPA part#s hope this helps out. My car #1126 takes the 1595mm belt. From what I have found the parts books seem to say that the GN belt and TTA belt is the same but we all know that is not the case. Good luck, any questions let me know.

The stock GM belt for ours cars is 1605 mm. Though the 1595 will fit, its not the correct length and typically cuases extra pressure on the tensioner. And some guys use the 1615 and have had good results. Tho I bought one of those and after some time, my idler would start hitting my AC compressor.

Just an FYI

 

[Ram Air TTA]

Yea me too Razor, I also had the 1615mm on my car and after about a week the pulleys were touching off and on. So far I have had no problems with the 1595 mm belt, remember the stock GM listed belt is only 10mm longer than the Napa belt that I'm currently using. Just for info 1" = 25.4mm