 Piston Slap?, Advice Please |
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| solex |
  Apr 19 2009, 05:52 PM
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#1
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Senior Member  Group: Members Posts: 789 Joined: 12-January 05 From: Long Island, NY Member No.: 3,439 Region Association: North East States  |
I recently performed a top end rebuild on my engine with:
At about 150 miles I started to hear a knock at idle, sounded like it was coming from #2. The sound seemed to be some what reduced when the plug wire was disconnected. At 200 miles I decided to do some more investigation; during oil change I noticed that there was a sludge / silvery substance on the oil strainer plate and decided to tear it down, thinking that there was a problem with a rod bearing. The first thing I noticed was some rubbing on the #4 exhaust push rod. I removed the heads and noticed that there was cylinder scoring on the tops and bottoms, remove the cylinders and saw the tops and bottom were worn... this must be the source of the silvery sludge. Attached are some pictures. No what do I do? Any advice would be greatly appreciated... (IMG:style_emoticons/default/sad.gif) (IMG:style_emoticons/default/sad.gif) Dan Attached image(s)    
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Replies
| Jake Raby |
Apr 19 2009, 06:39 PM
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#2
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Engine Surgeon Group: Members Posts: 9,398 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
Yep.. Most every time that people try to "get away with" not splitting the case, this happens... You could do partial builds before these engines were 30+ years old..
I haven't even attempted to do this in the last 15 years, back when I did I had a 50% success rate at best. The more you go out of your way to avoid a problem the more problems are created! I bet the issue is the rod bearing/ crank... How tight were the wrist pins in the piston/rod?? did you install them with your fingers only, or did they need persuasion? |
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Posts in this topic
solex Piston Slap? Apr 19 2009, 05:52 PM
Jake Raby Looks like the cylinder/ piston wasn't cleaned... Apr 19 2009, 06:13 PM r_towle are there any markings on these "NOS" pi... Apr 19 2009, 06:21 PM solex Yes Jake I take a number of short cuts and am now ... Apr 19 2009, 06:30 PM
r_towle
Yes Jake I take a number of short cuts and am now... Apr 19 2009, 06:32 PM solex As you can imagine I'm kicking myself. :headba... Apr 19 2009, 06:59 PM Jake Raby The pics aren't showing anything notable... Fe... Apr 19 2009, 07:08 PM solex
That pin looks like it was stuck in the rod. was ... Apr 19 2009, 07:17 PM Jake Raby Not tomorrow.. I am scheduled on the dyno all day ... Apr 19 2009, 07:24 PM solex
I can talk to you on my way home tomorrow night, ... Apr 19 2009, 07:30 PM r_towle It looks like the rod bearing spun...or is that ju... Apr 19 2009, 07:28 PM solex
It looks like the rod bearing spun...or is that j... Apr 19 2009, 07:33 PM Jake Raby I thought the bearing had spun as well, but only o... Apr 19 2009, 07:40 PM solex
I thought the bearing had spun as well, but only ... Apr 19 2009, 07:44 PM jmill Did you change the lifters out? Wonder if you swa... Apr 20 2009, 07:23 AM solex
Did you change the lifters out? Wonder if you sw... Apr 20 2009, 07:37 AM solex After splitting the case, looks like I have some c... Apr 22 2009, 07:53 PM r_towle looks like possibly the case did not close correct... Apr 22 2009, 07:56 PM solex Rich,
I think the dowels and bearings were all lin... Apr 22 2009, 08:33 PM |
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