Type 4 Engine V-Belt Info |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
Type 4 Engine V-Belt Info |
McMark |
Jul 2 2017, 08:03 AM
Post
#1
|
914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
I've always found that the V-Belts (alternator belt) that you get handed when you walk into a part store isn't quite right most times. So since I needed to find a shorter version for one of my high-amp alternator installs I figured now was a great time to finally do the research and find out what the RIGHT belt is.
Here's the final specs, which I'll update if more info comes to light: Belt Angle: 36° Belt Length: 965mm Top Width: 9.5mm My Selection based on the numbers is the ContiTech Brand. Actual installation experience to follow... And here's my methodology: First I grabbed an alternator pulley off the shelf and measured the V groove directly. This isn't particularly easy because the groove is so small, but I measured 34° (note there is a margin of error here). Belt length is farily easy based on a couple sources. The 914 PET didn't list a belt for the 4 cyl (that I could find) but I happened to have a car with a very original looking belt. VW logo and everything. It lists the length as 965mm. Also looking up the VW part number on that belt comes back with a 965mm belt length. I used a belt length calculator and entered measurements from a stock fan/alternator setup and also arrived at 960mm. Top Width is listed on my presumed-OE belt as 9.5mm. I had a 11mm top width belt here and it stands up out of the groove too much. What's Available Here's the belts I looked up for a 73 914 2.0, in a spreadsheet. I would love to add more listings to this file if you have any. Attached image(s) |
porschetub |
Jul 16 2017, 08:56 PM
Post
#2
|
Advanced Member Group: Members Posts: 4,706 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
9.5mm is common on many german cars ,many use the 10mm but it isn't right,it won't fit down low enough and wears its way in until it becomes loose,@ the same time it polishs the pulleys so the belt will slip or chirp after being re-adjusted....seen it SO many times.
Most people overtighten belts cause they can't be bothered finding the correct tension,Marks comment about pulley angle was 36degrees...not sure but remember 35 off the top of my head...anyway. IMO any belt running over pulley o.d. is just not doing the whole job. |
Lo-Fi Version | Time is now: 10th June 2024 - 12:33 AM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |