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WD 45 overheating

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toot
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PostPosted: Mon Jan 25, 2021 10:57 am    Post subject: WD 45 overheating Reply to specific post Reply with quote

Acquired a WD45, timing and fuel setting are correct, cooling system has been flushed twice, new 50/50 antifreeze, but tractor overheats after running/driving for about 20 min. I checked thermostat and even removed it, doesnt seem to help. I have noticed that the other inlet on the head is plated off where perhaps a water manifold had two entries into top of head. Currently is using just one.. Not sure if thats correct.. Opinions?
 
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old
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PostPosted: Mon Jan 25, 2021 11:24 am    Post subject: Re: WD 45 overheating Reply to specific post Reply with quote

Point gap set correctly?? Point gap can change timing a bit. You say it was flush as in how just the radiator or the whole cooling system. Me I use vinegar and fill the system and run it till good and warm then drain and back flush by way if the block drain
 
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Bob Bancroft
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PostPosted: Mon Jan 25, 2021 1:24 pm    Post subject: Re: WD 45 overheating Reply to specific post Reply with quote

WD and earlier used two, WD45 and later used just the one. You've got something else going on. We used to work a WD45 hard and overheating was not a problem.
 
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Aaron SEIA
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PostPosted: Mon Jan 25, 2021 5:46 pm    Post subject: Re: WD 45 overheating Reply to specific post Reply with quote

The WD45 did just use a single port thermostat housing. As others have said, you have something else wrong. It's almost impossible to overheat one. What are you basing the thought that it overheats on? Temp gauge, boiling over, infrared thermometer?
AaronSEIA
 
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toot
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PostPosted: Mon Jan 25, 2021 6:56 pm    Post subject: Re: WD 45 overheating Reply to specific post Reply with quote

Temp gauge needs to be replaced. Steam at
cap, and boiling. It spews at cap and you
can hear coolant rumbling after shutoff. I
guess the only thing to do is keep
flushing/backflushing system and rad. I
guess the water pump is functioning
properly, no noise or leaks. Ive had WDs
and WCs over time and never ran into this.
 
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toot
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PostPosted: Mon Jan 25, 2021 7:04 pm    Post subject: Re: WD 45 overheating Reply to specific post Reply with quote

Whole cooling system flushed/backflushed. Point gap is correct.
 
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PostPosted: Mon Jan 25, 2021 8:49 pm    Post subject: Re: WD 45 overheating Reply to specific post Reply with quote

Water pump can be bad due to impellers rusted away or fan belt slipping
 
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DrAllis
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PostPosted: Tue Jan 26, 2021 4:06 am    Post subject: Re: WD 45 overheating Reply to specific post Reply with quote

Tell me how you set or adjusted the ignition timing ??
 
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4wdtom
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PostPosted: Tue Jan 26, 2021 5:00 am    Post subject: Re: WD 45 overheating Reply to specific post Reply with quote

If someone has had the head off of the engine it is possible they have a wrong head gasket. I think the head gaskets for the single passage coolant water manifold had a restriction (smaller holes) in the front water passages to make more water flow to the rear of the engine and the holes in the rear of the engine were larger to allow increased flow to the rear. Maybe Dr. Allis will comment on this.
 
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toot
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PostPosted: Tue Jan 26, 2021 7:18 am    Post subject: Re: WD 45 overheating Reply to specific post Reply with quote

No 1 cylinder to tdc, turned dist til spark
on no 1 plug. Its certainly not retarded
too much to cause overheating. The thing
runs and sounds great.
 
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DrAllis
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PostPosted: Tue Jan 26, 2021 10:11 am    Post subject: Re: WD 45 overheating Reply to specific post Reply with quote

Correct timing is done with a timing light, shining on the bottom of the flywheel with the engine at wide open throttle speed. The mark on the flywheel will be "F" or "FIRE" or maybe "F-30". When the engine is then idled down slowly to 400 RPM it will be close to the TDC mark. The higher compression the engine is ( like a WD45), the more critical correct ignition timing is. So, regardless what you think, you do not know if it is timed correctly or if the centrifugal advance is working properly unless you use a timing light. Not saying this is your problem, but you can't say that it isn't.
 
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PostPosted: Tue Jan 26, 2021 12:17 pm    Post subject: Re: WD 45 overheating Reply to specific post Reply with quote

👍
 
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rustred
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PostPosted: Tue Jan 26, 2021 2:35 pm    Post subject: Re: WD 45 overheating Reply to specific post Reply with quote

if you have a plate over that inlet no wonder its heating. post a picture so we are on the same page.
 
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Aaron SEIA
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PostPosted: Tue Jan 26, 2021 4:22 pm    Post subject: Re: WD 45 overheating Reply to specific post Reply with quote

The WC and WD used both left side water ports in the head. The WD45 only uses the front port. I don't think that'd the problem here.
AaronSEIA
 
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big orange
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PostPosted: Thu Jan 28, 2021 6:32 am    Post subject: Re: WD 45 overheating Reply to specific post Reply with quote

Hoses good or is one collapsing?
 
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