Dry film coatings for engines and wear surfaces, New parts and Reproccesing good used beaings |
|
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. |
|
Dry film coatings for engines and wear surfaces, New parts and Reproccesing good used beaings |
Mark Henry |
Feb 28 2014, 08:34 AM
Post
#1
|
that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Starting to do DFL (Dry Film Coating)
http://en.wikipedia.org/wiki/Dry_lubricant Ever pull apart an engine and you look at the bearings and say to yourself "those look good, I bet I could reuse them..." but you don't because the are stained or have the odd speck in them? Well these puppies are getting expensive and some are hard to find. For the most part you don't need expensive measuring tools to figure this out, you just need eyeballs and fingernails. If it has obvious physical damage, wear through, pitting, material missing or large scratches you can catch your fingernails on, then sorry you need new bearings. Minor scratches down the middle that you barely catch a nail on may be OK. Also look at the backs, loose bearings will "walk" scoring the back. Again stains are OK, physical damage is not. Also when you remove the bearing does it just fall out (not good) or does it still hold itself in the saddle (good sign) and you have to wiggle it out. On Porsche 911 I'd say 9 out of 10 of the #8 bearings can be reprocessed. Used main bearing set (IMG:http://www.914world.com/bbs2/uploads/post-26-1393378175.jpg) New full bearing set (IMG:http://www.914world.com/bbs2/uploads/post-26-1393428146.jpg) used intemediate bearings before (IMG:http://www.914world.com/bbs2/uploads/post-26-1393529753.jpg) after (IMG:http://www.914world.com/bbs2/uploads/post-26-1393529779.jpg) 3.2 set before, minor scratches, 3 deeper scratches but still within spec. before (IMG:http://www.914world.com/bbs2/uploads/post-26-1393530486.jpg) after (IMG:http://www.914world.com/bbs2/uploads/post-26-1393594831.jpg) Close up pic's of the 3 worst from that set (IMG:http://www.914world.com/bbs2/uploads/post-26-1393594792.jpg) Not offering this on type 4 bearings (except I will do the steel backed split middle) at this time. This may change once I test a process. Piston skirts and ceramic piston coatings coming soon. Inspect and process full 911 engine bearings set (main, #8, rod and intermediate bearings, new or used) $175 Turn around 2-3 days. |
Mark Henry |
Mar 22 2014, 11:28 PM
Post
#2
|
that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
I s sort of like powder coating but you don't need the electrical charge on the part. It is a baked finish.
It can increase the tolerance slightly, but by burnishing you can make it very sight. It won't eliminate piston slap from a part with excessive tolerances, It will help the skirt slip in the bore better. The coatings, besides being a dry film lube, wick the oil or grease to the face of it's surface. |
puffinator |
Mar 23 2014, 08:00 AM
Post
#3
|
Member Group: Members Posts: 193 Joined: 6-August 13 From: Annapolis, MD Member No.: 16,218 Region Association: MidAtlantic Region |
I s sort of like powder coating but you don't need the electrical charge on the part. It is a baked finish. It can increase the tolerance slightly, but by burnishing you can make it very sight. It won't eliminate piston slap from a part with excessive tolerances, It will help the skirt slip in the bore better. The coatings, besides being a dry film lube, wick the oil or grease to the face of it's surface. What is the additional thickness of the film? I just tore down a -6 and bearings look very good. |
Lo-Fi Version | Time is now: 27th September 2024 - 09:10 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 ... |