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Allis Chalmers Discussion Forum

WD head

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Don Ober

01-20-2008 16:22:05

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I have a WD that I`m working on (head gasket) and thought since I`ll have it off might aswell put a rebuilt head on it,I have one from a WD45,I think this is the same as WD just want to make sure before I start the job. THANKS Don

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Don Ober

01-22-2008 07:10:01

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 Re: WD head in reply to Don Ober, 01-20-2008 16:22:05  
After all the info posted guess I`ll just take the WD45 short block and rebuild it this winter then put it on the WD,should last till I`m in the box. Don

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01-21-2008 16:33:37

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 Re: WD head in reply to Don Ober, 01-20-2008 16:22:05  
its amazing how many people are acctually suggesting its better to use an old worn out engine part over a new one. if you put a new head on and you burn oil, your engine was probly worn out in the first place. oil's cheap, and a good running engine beats one that uses a little more oil anyday.

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01-21-2008 15:25:22

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 Re: WD head in reply to Don Ober, 01-20-2008 16:22:05  
thats ridiculous to say for certain that tuning up the head will make the compression so great that it will blow out the bottom.

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Don Ober

01-21-2008 07:02:06

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 Re: WD head in reply to Don Ober, 01-20-2008 16:22:05  
I measyred the heads I have a 3 inch on the WD and my WC the extra head came from my parts tractor a WD45 so I have all the bolts and hardware with it,the last owner of the WD had rewired it and was running it with plug wires crossed thus causing it too back fire pretty much all the time along with not torqceing the head just getting a small leak at the edge.I will check yhe rest of engine out once I remove the head,the WD45 engine has one cylinder rusted fast otherwise looks pretty clean DON

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01-20-2008 20:49:35

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 Re: WD head in reply to Don Ober, 01-20-2008 16:22:05  
Head depends on which one you have. Later WD had the same "tall" head as the WD45, earlier ones had the "short" like on the 201 WC engine. Early = 3 inch height, later is 4 inch height. Same pushrods each engine, but the rocker arm support was different, if I remember right. So you need the right rocker arm supports to switch heads. Check archives for more info, or dealer.

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01-20-2008 20:11:06

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 Re: WD head in reply to Don Ober, 01-20-2008 16:22:05  
not to be disrespectful 'old', but that just not true

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jd plowboy

01-21-2008 15:47:23

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 Re: WD head in reply to powertech84, 01-20-2008 20:11:06  
i agree with old and i know it to be true because i done the same thing. took a head off a engine because it leaked around the gasket and instead of putting it back on in the shape it came off i had the valves ground and that is where i made my mistake. it didnt use must oil to start with but then it started dranking it. on a engine you are not using must or that long at a time you might not see much difference but put it to work and be sure to keep plenty oil with you because you will definitly need it. just my 2 cents

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01-20-2008 20:51:03

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 Re: WD head in reply to powertech84, 01-20-2008 20:11:06  
Sorry but your not right. BTDT and have seen it many many times. If you fix the top and not the bottom you will pay for it in the long run. I have been building engines for decades and found out 40 year ago do it right or not at all

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Jeff Z.

01-20-2008 21:12:35

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 Re: WD head in reply to old, 01-20-2008 20:51:03  
Quote from another site:

The second piece of advice I can offer is to do a thorough diagnosis of the engine's problems. A significant percentage of the dead engines we see on our inbound loading docks each day are the result of poor or superficial diagnosis by technicians who just didn't take the time to find out what the engine's real problem was.

The classic example is a blown head gasket, which has caused cool- ant leakage and overheating. Most technicians simply blame the gasket and replace it. But what caused the gasket to blow in the first place? If you don't find that out, you may see that engine again in the very near future, and it will have the word "Comeback" hanging from the radiator.

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01-20-2008 21:30:22

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 Re: WD head in reply to Jeff Z., 01-20-2008 21:12:35  
Yep you need to do the home work of no work. I have laughed many times when some one say they just had there head done and then in 6 month to a year wonder why the engine is burning oil. Well its simple build the compression on top and do nothing to the bottom the bottom will blow out. I like the saying. No matter what the task great or small do it right or not at all.
Doing that will in the long run save big bucks

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01-20-2008 19:36:31

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 Re: WD head in reply to Don Ober, 01-20-2008 16:22:05  
BIG problem with that. If you rebuild the top you better do the bottom or it will go bad soon. Heres how it is. If you rebuild the head but don't work on the ring, rods and mains the bottom of the engine will most likely go south soon after. All parts in an engine wear about the same so if you fix one area you better fix the other or it will cost you a lot more money in the long run. BTDT and found out the hard way and cost me $$$$

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John (C-IL)

01-20-2008 18:24:46

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 Re: WD head in reply to Don Ober, 01-20-2008 16:22:05  
THere were 2 heads, they are commonly called the "tall" head and the "short" head. THe WD started with the short head and switched to the tall head later in production and remained in use for the WD45. Measure the height of the head to tell if they are the same.

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