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Weak spot in wd45 engine?

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ac-wd45

08-16-2004 12:24:19




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Have a gas wd45 that I suspect is leaking water into the crankcase. I know it has wet sleeves, is there a "usual" place that the block/sleeve cracks or otherwise lets water in? I found that the PO had a '15-18 psi' radiator cap(!%#*&!!?!) on it and think that may have added to the problem. Also, does the head gasket have a weak spot in it that would break/crack allowing some seepage? Any help is appreciated!

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John R. Alcorn

08-17-2004 22:44:01




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 Re: Weak spot in wd45 engine? in reply to ac-wd45, 08-16-2004 12:24:19  
I fixed some web crackes on a WD 45 about four years ago with JB weld, Ijust ground the cracks out a little with a small air saw and filled them,then honed smove, it's still holding, not the proper way to fix but worked for me. Someone said something about blowing water out the radiator cap, that would mean it is geting compression in the cooling system some where, compression in the cooling system could cause the O rings to leak but the O rings couldn't cause it to blow water out the radiator.

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Many Thanks!!

08-17-2004 13:26:10




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 Re: Weak spot in wd45 engine? in reply to ac-wd45, 08-16-2004 12:24:19  
Thanks to all that posted, very helpful. I've only gone into the valve cover and didn't see any leaks on the freeze plugs but I will check again. I want to eliminate as many potential problems as possible before I tear it down. Thanks again!!



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Butch

08-17-2004 07:49:26




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 Re: Weak spot in wd45 engine? in reply to Jim Danforth, 08-17-2004 07:30:13  
With no SA implied or intended perhaps we should all be a little more specific in our answers and exact in our terms when posting about cracks between the cylinders. Myself, and I belive all the others here were refering to the lower part of the block were the O-rings seal, this is the "web" area of the block, as I posted. You are reffering to the top of the block or what is properly known as the "deck". While you are correct in that cracks in the deck area are usualy of little concern, cracks in the web area means the person has a junk block on their hands unless they are willing to put more into fixing it than it can be replaced for or willing to trust block sealants for a permanant fix.

Just trying to keep the original poster from being confused.

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Carl in WI

08-16-2004 21:50:26




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 Re: Weak spot in wd45 engine? in reply to ac-wd45, 08-16-2004 12:24:19  
I had the same exact problem this spring. Last fall I flushed and replaced the antifreeze and used it about 3 weeks and parked it for the winter. This spring I started it up and in about10 minutes the oil started to ooze out every hole in the engine. What a mess. A quick way to see if your sleeve O-rings are leaking is to remove the oil pan and fill up the block with water and watch where the water is coming from. I did this and found the 2 middle sleeves leaking. I have cracks in both upper and lower webs.
I am going to install bolts through the block to compress the cracks and put the engine back together with new sleeve seals and gaskets.I will also add a block sealer. Good luck.

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BushogPapa

08-17-2004 07:22:12




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 Re: Weak spot in wd45 engine? in reply to Carl in WI, 08-16-2004 21:50:26  
Before you button up the engine, and this can be done on one not torn down...( just have the freeze plugs removed to get the water jacket clean).. Run at least a pint of non-hardening Permatex thru a hose down into the bottom of the water jacket..let it coat ALL the area of the webs and sleeves where they meet the block... You won"t have any leaks.... Pinning the block IS a good idea, in the case of web-cracks...but permatex will work...saves a tear-down, too...

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BushogPapa

08-16-2004 21:21:54




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 Re: Weak spot in wd45 engine? in reply to ac-wd45, 08-16-2004 12:24:19  
Weak spot is the web between # 1&2 and # 3&4... They crack the web, between the sleeves..can be welded and pinned, or just use Bars Leaks, and go on using it...



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Gordon in IN

08-16-2004 21:17:49




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 Re: Weak spot in wd45 engine? in reply to ac-wd45, 08-16-2004 12:24:19  
You might be "lucky" and have a rusted through freeze plug in the cylinder head. You only have to take off the valve cover to check for this and fix it, if that is what it is. That is the "best" water leak into the crankcase that I know of. Good luck



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Butch

08-16-2004 13:45:58




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 Re: Weak spot in wd45 engine? in reply to ac-wd45, 08-16-2004 12:24:19  
Headgasket? sleeve O-rings? internal cracks in the lower web? Anybody's guess is as good as yours. Unless lucky on your guess you can save grief and bucks by removing the valve cover and oil pan and locating the leak instead of guessing. Gaskets arent that much (get them from AGCO) and your going to need them anyway. Leave the coolant in the radiator, if the leak is small pressurizing the raditor will help. Look between the sleeves (cracks in the web), around the outside of the sleeves (O-ring sealing)Between the piston and sleeve (internal cracks, pin holes in sleeves, possible head gasket) and the oil return passages from the head, if coming from the oil returns make double sure it isn't coming from on top of he head, if not it's a head gasket problem, before throwing another head gasket on it check for proper sleeve protrusion, cracks and surface irregularities.

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Bob in Wi

08-17-2004 08:13:46




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 Re: Weak spot in wd45 engine? in reply to Butch, 08-16-2004 13:45:58  
Would any or all of these cause the coolent to over flow out of the radiator cap?



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Carl in WI

08-17-2004 14:10:19




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 Re: Weak spot in wd45 engine? in reply to Bob in Wi, 08-17-2004 08:13:46  
Bob, This was one of my problems last summer. I used allot of water and it seemed to be loosing it out of the radiator cap. The oil looked good, the exhaust looked good and I did not figure on leaking sleeve seals. Once I renewed the antifreeze for winter I really had a surprise in spring. Where are you located in WI? I am just North of Sheboygan where the PGA 2004 was held.



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Bob in Wi

08-18-2004 19:07:13




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 Re: Weak spot in wd45 engine? in reply to Carl in WI, 08-17-2004 14:10:19  
A friend has my grandpa's wd. He had to replace the head with a D-17 head. After that it blows the water out when warms up.



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