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!

How's the oil pressure? What's the actual rod bearing clearance?

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Joshua

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

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

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

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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Shane
Pasadena, TX 77505

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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Scrapple: Because a mind is a terrible thing to waste.
73 Duster - Race Car
66 Dart Wagon - DD
178" FED
82 D150
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