 Taking the crank down to bare bones, swapping bearings |
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| DNHunt |
 Nov 23 2005, 01:28 PM
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#1
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914 Wizard? No way. I got too much to learn.  Group: Members Posts: 4,099 Joined: 21-April 03 From: Gig Harbor, WA Member No.: 598  |
Time to get this thing done so, here's how I pulled the gears on the crank and replaced the #3 main bearing.
First I drilled a countersink into the top of an 8 mm bolt to protect the threads in the nose of the crank thtat secures the fan hub. Attached image(s) 
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| Jake Raby |
Nov 23 2005, 02:57 PM
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
Dave has involuntarily been a guinea pig for Charles and I!
The issue was with his Nickies/JE pistons and JE piston rings compatibility. This issue has only shown up with Dave's engine and one of my test engines and none of the other dozen+ of my engines using the exact same rings/piston/cylinder combo have had the issue... Not even after thousands of miles on a few of them. Charles from LN has the answers he is the guy tyhat did all the homework on the problem along with a consultant that he hired that has had similar issues with 911 engines and JE pistons. Dave has been a real sport through this- a truely great customer! When it occured I offered to have the engine shipped here, tear it down, get to the bottom of it and then reassemble and dyno it (free of charge). This was because I felt bad about it happeneing AND that I wanted to see what happened to it first hand and then terrorize it on the dyno afterward to ensure it was right. Dave chose to suck it up and do it himself so I supplied him with the parts while Charles and JE went a few rounds on the issue. A few weeks and a chunk of change later the issue was found to be a flaw of sorts with the JE oiling ring package. The oiling rings were replaced with an alternate part and Dave is reassembling. At the same time I'm finishing another engine that has the same specs and cylinders/pistons and using the improved oiling ring with it as well for test purposes to ensure things are taken care of once and for all.. This is the joy of my position.... Having weird, unexplained issues that have no solution without a lot of effort! FYI- 96mm Nickies were used in BOTH instances that we had an issue with, none of the other engines have ever had this issue with Nickies.. We honestly think it was a very isolated issue since my pistons/rings and etc for the test engine were purchased at the same time I supplied the pistons to Dave in his kit... Dave, thanks again for the understanding and perseverence- if you have questions -call me (and I don't give a damn if it's Thanksgiving or not!) you have the number. |
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Posts in this topic
DNHunt Taking the crank down to bare bones Nov 23 2005, 01:28 PM
DNHunt I threaded that bolt into the nose of the crank th... Nov 23 2005, 01:30 PM DNHunt You end up with a bare crankshaft that you can get... Nov 23 2005, 01:34 PM DNHunt You end up with these bits Nov 23 2005, 01:35 PM DNHunt Clean and lube up the journal and put the bearing ... Nov 23 2005, 01:39 PM DNHunt Heat up the gears to expand them. I got away with ... Nov 23 2005, 01:45 PM Headrage I used a toaster oven for my gears. Once they are... Nov 23 2005, 01:48 PM DNHunt Drop the gear on, line up the slot with the Woodru... Nov 23 2005, 01:48 PM DNHunt Next comes a spacer with the VW logo. Nov 23 2005, 01:50 PM DNHunt Next comes the dizzy drive gear. Line it up with t... Nov 23 2005, 01:52 PM DNHunt Here's my persuader. I love PVC pipe. I have a... Nov 23 2005, 01:58 PM DNHunt Lastly, there is a retaining ring which can be a b... Nov 23 2005, 01:59 PM maf914 Dave,
What are you building now? Didn't you ... Nov 23 2005, 02:38 PM thesey914 Dave is this another teardown of your four? I thou... Nov 23 2005, 02:41 PM Mark Henry yeh...what he said http://www.91... Nov 23 2005, 02:54 PM DNHunt This is the same engine. I had the same problems t... Nov 23 2005, 03:35 PM davep Bravo, and the best of luck this time around. Nov 23 2005, 04:10 PM Carrera916 wow!
KUDOS to these guys for sharing the info... Nov 23 2005, 04:38 PM thesey914 I'm just waiting for JP or Trek to chime ... Nov 23 2005, 04:56 PM Jake Raby The cam is another interesting thing... I haveb us... Nov 23 2005, 05:07 PM rhodyguy a 5hp loss on dave's engine will be undetectab... Nov 25 2005, 11:10 AM davep h... Nov 25 2005, 01:11 PM |
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