 Picture...Cam Bearing Delamination, Reason for failure?? |
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| Mueller |
 May 27 2003, 10:38 AM
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#1
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914 Freak!  Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None 
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I decided to pop open the case on my 2.0 /4 to replace the cam with a more aggressive one and also to open up some of the passanges for the HD oil pump.
I found the cam bearings to be not in the best shape. Supposedly the motor only had 10k miles on it before I took possesion of it. I do know the motor sat for at least a year before I got it. Attached image(s) 
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| seanery |
May 27 2003, 10:41 AM
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#2
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waiting to rebuild whitey! Group: Retired Admin Posts: 15,841 Joined: 7-January 03 From: Indy Member No.: 100 Region Association: None |
YIKES! (IMG:style_emoticons/default/ohmy.gif)
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| Lawrence |
May 27 2003, 10:43 AM
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#3
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Senior Member Group: Benefactors Posts: 1,661 Joined: 5-February 03 Member No.: 244 Region Association: None  |
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| Brad Roberts |
May 27 2003, 11:10 AM
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#4
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
They are COOKED !!
What do the rod bearings and mains looke like. I have NEVER seen the material GONE from a cam bearing. B |
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| J P Stein |
May 27 2003, 11:15 AM
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#5
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Irrelevant old fart Group: Members Posts: 8,797 Joined: 30-December 02 From: Vancouver, WA Member No.: 45 Region Association: None |
The odd shape of those pits suggests electrolysis.
Iron/water/non-ferros metals.....munchies. Could use a bit more light on the subject, tho. |
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| Brad Roberts |
May 27 2003, 11:17 AM
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#6
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
When he first said something the other night.. I wondered if water had sat in the bottom of the engine.
B |
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| Mueller |
May 27 2003, 11:48 AM
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#7
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None
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The crank bearings look decent, I can tell a few bits of the babbit or bearing media found it's way into the crank bearings.
The cam looks perfect, no signs of wear or discoloration. Dissimilar metals might have done it as JP mentioned. |
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| Mark Henry |
May 27 2003, 12:33 PM
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#8
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
QUOTE(Brad Roberts @ May 27 2003, 09:17 AM) When he first said something the other night.. I wondered if water had sat in the bottom of the engine. B That would be my first guess! |
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