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Clean Those Blocks

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raytasch

01-22-2003 17:16:44




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I post this for those of you with little or no experience with engine maintenance who might be rebuilding your N and for those of you with overheating problems. I am currently cleaning up some N engines and every one of them has the block water jackets blocked or greatly restricted by sediment. A couple of these blocks have the water jackets filled to within a couple inches of the top of the deck. Remove the freeze plugs on the left side of the engine. You will find two freeze plugs on earlier blocks and four on a later block.
Also remove the coolant drain plug. Dig and flush the block to get rid of the sediment. You will have a much cooler and longer running engine. I offer this for what it is worth to you.
ray

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OK720

01-23-2003 18:19:40




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 Re: Clean Those Blocks in reply to raytasch, 01-22-2003 17:16:44  
Good idea to clean the water passages. But DON'T try hooking up a garden hose with a spray attachment to a hot water tap from your laundry room. I did that about 20 years ago to clean out a block. It worked great until I shut the spray off after a few minutes. Before my wife could yell at me, the hose grew about ten times its normal size, then blew up. Hot water went all over my wife. She was OK, but it was a long, long time before she let me forget about it. It could have given her a very nasty burn. SO DON'T DO IT!!

Use cold water. It will work just as well, anyway.

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Mountainman

01-22-2003 23:58:16




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 Re: Clean Those Blocks in reply to raytasch, 01-22-2003 17:16:44  
Yep.

"Dig and flush the block to get rid of the sediment."

I removed all the freeze plugs from a V8 I didn't want to remove the heads from, and used a coat hanger wire to 'dig' out everywhere it could reach. I don't have a pressure washer but I used straight hot water in a garden hose from the laundry sink to flush it with.
Somewhere in the process I also used compressed air. Seemed like the crud would never quit!

New freeze plugs and the motor runs at the right temp all the time.

N - joy.

Mountainman...CA

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GregWis

01-22-2003 20:31:41




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 Re: Clean Those Blocks in reply to raytasch, 01-22-2003 17:16:44  
Keep the tips for the uninitiated coming. Will get to this as soon as we thaw out...probably mid- May the way it feels today. I have learned a heck of a lot from this board..saved time,money and tractor.Thanks!



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Hobo,NC

01-22-2003 17:50:25




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 Re: Clean Those Blocks in reply to raytasch, 01-22-2003 17:16:44  
I just went threw that. I got one sitting on a motor stand now that I got at a junk yard. The water jackets was the home of a few mice.



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BC Mike C

01-22-2003 17:26:27




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 Re: Clean Those Blocks in reply to raytasch, 01-22-2003 17:16:44  
I have got my boat motor apart and if I had not removed the sleeves I would not have seen the scale build up in the water passages. It was easy to remove but got me wondering about how to clean it out of other blocks. I will add your info to my small book of knowledge. BC mike C



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Willy-N

01-22-2003 18:14:02




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 Re: Re: Clean Those Blocks in reply to BC Mike C, 01-22-2003 17:26:27  
I clean my blocks with a 3,000 psi presure washer. I remove the pet cock and stick the tip in the hole and blast away. I also blast down in every hole in the top of the block and in the water pump. If the head is on I blast into the radiator hose opening in the head and into the pet cock and water pump. I keep doing this till the block is clean and the water runs clean. You would not belive what will come out when you do this. Mark H.

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Dave Smith

01-22-2003 18:41:01




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 Re: Re: Re: Clean Those Blocks in reply to Willy-N, 01-22-2003 18:14:02  
I read in one of my car magazines reciently to use a reversable drill motor and a piece of 1/4 or 5/16 inch wire rope about 1 foot long. Put the wire rope into a passage hole and run the drill motor. The drill motor must run in reverse to keep the wire rope from unwinding. I would not put it into a taped stud hole for fear of damage to the threads. I think a variable speed would be wise also. I have not tried this yet but it sounds like it would break loose any scaley rust.
Dave <*)))><

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Willy-N

01-22-2003 19:53:12




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 Re: Re: Re: Re: Clean Those Blocks in reply to Dave Smith, 01-22-2003 18:41:01  
Haven't heard that one befor. Seems like it would work. Just need to break up the junk and flush it befor it settles again. Mark H.



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Willy-N

01-22-2003 18:13:07




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 Re: Re: Clean Those Blocks in reply to BC Mike C, 01-22-2003 17:26:27  
I clean my blocks with a 3,000 psi presure washer. I remove the pet cock and stick the tip in the hole and blast away. I also blast down in every hole in the top of the block and in the water pump. If the head is on I blast into the radiator hose opening in the head and into the pet cock and water pump. I keep doing this till the block is clean and the water runs clean. You would not belive what will come out when you do this. Mark H.

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BC Mike C

01-22-2003 17:25:58




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 Re: Clean Those Blocks in reply to raytasch, 01-22-2003 17:16:44  
I have got my boat motor apart and if I had not removed the sleeves I would not have seen the scale build up in the water passages. It was easy to remove but got me wondering aabout how to clean it out of other blocks. I will add your info to my small book of knowledge. BC mike C



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