calling engine rebuilders, looking for your input on these bearings, 2.2T 6-cyl |
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calling engine rebuilders, looking for your input on these bearings, 2.2T 6-cyl |
Optimusglen |
Jul 17 2017, 07:23 AM
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#1
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Senior Member Group: Members Posts: 901 Joined: 26-February 16 From: Minneapolis Member No.: 19,709 Region Association: Upper MidWest |
First, read this carefully. I'm not going to re-use the bearings. Never planned on it. I am just looking for input on condition and wear patterns.
This past weekend I was able to split the case on a 2.2T engine I am rebuilding for my 914. So far the tear down has been great, nothing broken, no chunks of metal or debris, everything came apart without much fuss, and the case has time-serts. Case is apart now, most of the bearings looks really good, a few have some wear. I've had a few engines apart but not many, and those were special circumstances so I don't have a lot of personal experience reading wear on bearings. One case half (IMG:http://www.914world.com/bbs2/uploads_offsite/c1.staticflickr.com-19709-1500297820.1.jpg) From one end to the other, close up's on each of them (IMG:http://www.914world.com/bbs2/uploads_offsite/c1.staticflickr.com-19709-1500297820.2.jpg) This one seems to have much more wear than all of the others for the crank. (IMG:http://www.914world.com/bbs2/uploads_offsite/c1.staticflickr.com-19709-1500297820.3.jpg) The dark spot here is oil. (IMG:http://www.914world.com/bbs2/uploads_offsite/c1.staticflickr.com-19709-1500297821.4.jpg) (IMG:http://www.914world.com/bbs2/uploads_offsite/c1.staticflickr.com-19709-1500297821.5.jpg) Wear on the far edge of this one. (IMG:http://www.914world.com/bbs2/uploads_offsite/c1.staticflickr.com-19709-1500297821.6.jpg) (IMG:http://www.914world.com/bbs2/uploads_offsite/c1.staticflickr.com-19709-1500297821.7.jpg) For the intermediate shaft bearings: (IMG:http://www.914world.com/bbs2/uploads_offsite/c1.staticflickr.com-19709-1500297821.8.jpg) More wear here too. (IMG:http://www.914world.com/bbs2/uploads_offsite/c1.staticflickr.com-19709-1500297821.9.jpg) Any thoughts or input from you guys and gals? The engine was a core, unknown history. Buying it was a roll of the dice. |
porschetub |
Jul 17 2017, 07:23 PM
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#2
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Advanced Member Group: Members Posts: 4,697 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
There was bad batch's of rod bearings from Glyco for many years and from what I read they were rather poorly made.
Some of the key players in the engine business went to Clevite (Mahle) bearing for this reason,however many said the genuine Porsche (Glyco) were better than standard off the shelf ones....but more spendy for a reason perhaps ?. Its seems folks check rod bearing install after being fitted to the rods,if the don't look right or don't measure for ovality send then back. Talk to Henry @ supertec or John Walker or maybe the engine builder your got the core from,they should point you down the right track. Yes you need a line bore as your bearing saddles are off square to the centre bore ,hope your countershaft journal checks ok as copper makes a crappy running surface...good luck ,looks like you bought a good core (IMG:style_emoticons/default/smile.gif) |
mepstein |
Jul 17 2017, 07:29 PM
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#3
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914-6 GT in waiting Group: Members Posts: 19,244 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
There was bad batch's of rod bearings from Glyco for many years and from what I read they were rather poorly made. Some of the key players in the engine business went to Clevite (Mahle) bearing for this reason,however many said the genuine Porsche (Glyco) were better than standard off the shelf ones....but more spendy for a reason perhaps ?. Its seems folks check rod bearing install after being fitted to the rods,if the don't look right or don't measure for ovality send then back. Talk to Henry @ supertec or John Walker or maybe the engine builder your got the core from,they should point you down the right track. Yes you need a line bore as your bearing saddles are off square to the centre bore ,hope your countershaft journal checks ok as copper makes a crappy running surface...good luck ,looks like you bought a good core (IMG:style_emoticons/default/smile.gif) I believe Porsche actually checks their bearings before sale and puts a small stamp on them. |
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