Does anyone rebuild AARs professionally? |
|
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. |
|
Does anyone rebuild AARs professionally? |
Tdskip |
Jan 11 2019, 10:18 AM
Post
#1
|
Advanced Member Group: Members Posts: 3,686 Joined: 1-December 17 From: soCal Member No.: 21,666 Region Association: None |
I’m starting to think the 731.7 FI car has a wonky AAR, still need to do more testing to make sure, but that led me to wonder if anyone rebuilds these professionally for us?
Sorry if this is common knowledge and I just haven’t caught up with y’all yet. |
Dave_Darling |
Jan 11 2019, 12:45 PM
Post
#2
|
914 Idiot Group: Members Posts: 14,990 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
They are not that hard to repair at home, though. The can part crimps over the lid that holds the pipes. The metal of the can is a bit thick, but it can definitely be pried back. You can then pull the top, containing the moving bits, out of the can. Lubricate it and work it a bit and it should free up.
If the resistance wire in the base of the can is broken, that's a little more involved. You can replace it with a 1-watt ~15-ohm resistor, if you can find one that fits in the space available. One end of the resistor would be attached to the can itself, the other would be attached to a wire that comes through the can, but is insulated from the can. If the bimetallic spring is broken, or if you cannot free up the rotary valve, then replace the whole thing. --DD |
dr914@autoatlanta.com |
Jan 11 2019, 01:09 PM
Post
#3
|
914 Guru Group: Members Posts: 7,872 Joined: 3-January 07 From: atlanta georgia Member No.: 7,418 Region Association: None |
we use a new modern heating element that is bulletproof
They are not that hard to repair at home, though. The can part crimps over the lid that holds the pipes. The metal of the can is a bit thick, but it can definitely be pried back. You can then pull the top, containing the moving bits, out of the can. Lubricate it and work it a bit and it should free up. If the resistance wire in the base of the can is broken, that's a little more involved. You can replace it with a 1-watt ~15-ohm resistor, if you can find one that fits in the space available. One end of the resistor would be attached to the can itself, the other would be attached to a wire that comes through the can, but is insulated from the can. If the bimetallic spring is broken, or if you cannot free up the rotary valve, then replace the whole thing. --DD |
GregAmy |
Jan 11 2019, 01:29 PM
Post
#4
|
Advanced Member Group: Members Posts: 2,308 Joined: 22-February 13 From: Middletown CT Member No.: 15,565 Region Association: North East States |
we use a new modern heating element that is bulletproof What's the amperage draw on these? I just think it's so inefficient that the default position on these is normally open, such that you have to maintain a constant current draw to keep it closed...and that if the current fails, it fails open. A timer relay to hold open a normally-closed valve for a set amount of time seems a much better idea. Then again, it's simple, and we are talking late 60s/early 70s technology...and in the end, I doubt it has a significant affect on fuel economy or alternator life. |
Lo-Fi Version | Time is now: 25th May 2024 - 06:05 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 ... |