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| 225 knock knock???? https://slantsix.org/forum/viewtopic.php?t=30600 |
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| Author: | shane.colston [ Sun Aug 17, 2008 9:01 pm ] |
| Post subject: | 225 knock knock???? |
225 with loud knocking around #5 piston. Pulled wire off of #5 and knocking goes away. Alot of white smoke when reving when cold. when let off of gas knocking goes up for about 5 seconds then subsides. Burns alot of oil. Fresh oil change and knock subsides for a few hundred miles. Still very good power. Checked converter bolts, very tight. Bearing old but tight. No metal in pan. From bottom, after removing rod cap, without resistants I was able to push up down and twist piston with rod inside cylinder. Help! |
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| Author: | Joshie225 [ Sun Aug 17, 2008 9:24 pm ] |
| Post subject: | |
How's the oil pressure? What's the actual rod bearing clearance? |
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| Author: | Wizard [ Mon Aug 18, 2008 6:24 am ] |
| Post subject: | 5th clyinder...hmmm |
This seems common. Usually this is oiling issues due to the drilling slightly off that pinches off the oil path to the crankshaft bearing. Take a look, while it's apart and measure stuff, check for that oiling partially plugged stuff. Cheers, Wizard |
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| Author: | terrylittlejohn [ Mon Aug 18, 2008 6:45 am ] |
| Post subject: | |
if you haven`t stop driving the car stop now, you have over lapped the rod bearing , i had this happen to me about 30 years ago on my first slantsix, same symptoms as your only i kept driving trying to sort it out and ended up putting the rod out behind the power steering pump. i had good oil pressure because the bearing flattened and blocked the oil passage to the rod journal, take care you might save the crank 
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| Author: | Doc [ Mon Aug 18, 2008 10:03 am ] |
| Post subject: | |
Quote: ...From bottom, after removing rod cap, without resistants I was able to push up down and twist piston with rod inside cylinder. Help!
It sounds like you removed the pan and checked the bearing, and it's OK.Based on that, I would guess it's a piston problem, either a worn wrist pin or a cracked piston... waiting to come apart. DD |
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| Author: | shane.colston [ Wed Jun 24, 2009 9:03 pm ] |
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Sorry for the delay. Shortly after I post I started to get alot of water in my oil. I took the head off and couldn't find any issues. I got tired of dealing with it so I did a quick rebuild on a junk yard engine and put it in, vroom vroom I'm on my way and very happy. Yesterday I took the oil pan off the old slant 6 (mind you I did this months ago) and found piston skirts in the pan. I'm assuming the rings wore out and piston rubbed a hole into the cylinder, thus causing water in oil. Sound right? Its a boat anchor now, but I'm back on the road and got the home association off my back. |
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| Author: | 66aCUDA [ Thu Jun 25, 2009 7:46 am ] |
| Post subject: | |
Shane What year is your old engine. I might want some parts off of it. PM me if you would. Thanks, Frank |
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