I recently ordered a fan shroud and thermostat for my '79 F-150 4x4 351M w/ A/C. After measuring the radiator core and checking numerous parts catalogs I ordered the D7TA-AA shroud. When I got it in, the opening was too small and, since I couldn't exchange it, I had to trim about 1/2" off of it, but I made it work. Come to find out that shroud casting seems to be the one that everyone sells for the 351, but has the wrong part number to fit my truck (has a 302 part number). No one has the one for this truck. The only place I even found it listed shows discontinued.

Then I ordered a thermostat from NPD (MotoRad 223-192, NPD part #8575-4) My first question is should it be the 180- or 195-degree thermostat? I remember reading a thread on here the 195 was the one I should put in. The truck is running a little warm (needle on the "L" on NORMAL on the gauge) and now I'm being told the thermostat might now be the correct one. I believe the one that was in the truck that was replaced wasn't the proper one for the truck to begin with (see photo, replaced one on left). Is the thermostat on the right the proper one? The plate on the bottom sits on the block and the thermostat has to be pushed down about 1/8" to sit flush on the block.

Has anyone else run into issues with parts listed for this motor not being the correct ones? Is there something I'm doing wrong? I just ordered a Ford parts catalog to try and prevent this in the future.

 

195 degree is the OE temp.

Carquest thermostats by Stant:

160 degree 45356
180 degree 45358
195 degree 45359

 

Thank for the info! Will the 351W thermostat fit a 351M? Some of the issues I'm finding are parts are listed to fit the 351M that really don't fit.

Stant's website shows the part # as 13469 for the 351M 195-degree. It also shows the one I bought as interchangeable (MotoRad 223-192)

 

I like to change from the 180/192 in summer/winter. The best thermostats are the old Robert/Shaw type that you can find at Summit racing etc. I don't know what the thermo on the right is for. It's not right for 335 series engines.

 

According to the Carquest database, it's the same thermostat for the 351W and 351M.

 

That's the one NPD sent for the 351M. It's also the same part number Stant references as interchangeable, Motorad 223-192

 

The 351M/400 and the 351C thermostats are unique to those engines. They won't work on other engines, and vice-versa. So, no a 351W won't work correctly. It'll fit, but won't do the job right.

The T stat on the right -in your first post - looks like the 351M/400, 351C T stat. They're the only ones with that little "hat" on the bottom.

You shouldn't have to "persuade" a Tstat to fit...normally, the right one would drop right in without a fuss.

 

So that probably is the right thermostat? I didn't have to force it when I put it in, it just say up a little because of the lower plate being spring loaded. I'm going to check the engine today with a thermometer to make sure the engine is running at the right temp.

 

Yes, you probably have the correct T-stat for your application. You could do a better search on "You Tube," "google," check out Summit, etc.

Good luck.

 

Thanks. I'm about to run pickup an infrared thermostat to check the radiator. Next is the fan clutch.

 

Good thermostats?

 

1977/79 F150/250 4WD & 1979 F350 4WD 351M/400: There are TWO different round headlamp radiator supports, TWO different fan shrouds.

One radiator support (has a larger opening radius) & fan shroud was only used with the Super Cooling Radiator (24 11/16" high x 26 7/32" wide) that has a HUGE top tank.

D7TZ-8146-A .. Fan Shroud - Use with standard/xtra cooling & A/C radiators / Not used with Super Cooling Radiator / Marked on upper left corner: D7TA-AA / Reproduced

D7TZ-8146-D .. Fan Shroud - Use with Super Cooling Radiator / Marked on upper left corner: D7TA-SA / Reproduced

Both of these shrouds are shown with their Ford part numbers and dimensions in Carpenter's 1967/79 truck repro parts catalog (2011 bound paper edition) on page 37.

Plus: There are 43 D7TZ-8146-D fan shrouds available NOS

There are two possible 351C/351M/400 thermostats: 192 degree = D0AZ-8575-A (Motorcraft RT-139) & 180 degree = D7PZ-8575-A (Motorcraft RT-310).

2leadfeet: I don't give a damn what Carquest says, the 351W thermostat is not the same!

The 351W T/stats (160/178/180/190/192 degree) are the same as 240/300 I-6; 302; 352 (1967 only); 360/390; 429/460.

 

Bill,

The problem I keep running in to is everywhere seems to list the D7TA-AA (which is what I was trying to buy) with the 8146-B part number (which is what I got, I think). I couldn't find anywhere that sells the 8146-A. The shroud fit with the exception of the fan being almost the same size as the opening. Do you know where an 8146-A can be obtained?

 

Carpenter had D7TZ-8146-A (marked D7TA-AA), but I just looked at his online 1967/79 truck repro catalog: No longer listed.

D7TZ-8146-A .. Fan Shroud / Obsolete

NOS PARTS SOURCE in Olathe KS has 1 = 913-220-5746.

HIGH BUCK! BOB ALLEN FORD in Overland Park KS has 1 = 913-381-3000.

RPN PARTS in Erie PA has 2 = 888-864-9305.
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FYI: D7TZ-8146-B .. Fan Shroud / Marked on upper left corner: D7TA-FA / Obsolete

1977 F100/250 2WD & F350 351M 2WD M/T with standard & extra cooling radiators before serial number X80,001.

1977 F150/250 351M 2WD M/T with standard cooling radiator from serial number X80,001 / 1978/79 F150/250 351M 2WD M/T with standard cooling radiator.

1977/79 F150/250 351M 4WD A/T with standard cooling radiator.

1977/79 F150/250 351M 4WD with xtra cooling & A/C radiators.

This shroud AFAIK, was never listed in Carpenter's catalog. It's not in my 2011 bound paper edition, it's not listed in his current online catalog.

Are you sure you want D7TZ-8146-A and not D7TZ-8146-B (see ^ applications) or D7TZ-8146-D which is the Super Cooling Radiator only fan shroud?

Can you post a sideview pic of your radiator? If you have your original shroud, look at the upper left (drivers side) corner for the ID number.

 

There wasn't a shroud on the truck when I bought it. As far as I can tell my radiator is the extra cooling radiator (see picture below). I measured the core to be 26 1/8"W x 19 1/4" H x 2" D. This was measured while it is bolted up and a shroud on, so I'm likely off a little. However, the shroud I purchased from Jeff's Bronco Graveyard (link) showed to be part D7TZ-8146-B casting D7TA-AA. Those numbers don't jive in the parts catalog as being linked from what I can tell.

My fan is is stamped D6TA-A2A and measured 19 1/2". The opening on the shroud I ordered is only 20 1/2" but didn't align straight to the fan so I had to trim about a half inch off of half of the opening and it worked. Otherwise it bolted up just fine.

My next question: Is this the extra cooling radiator? I am going to have to replace it and I don't want to get the wrong one (like the shroud incident, lol). I am going to try to find a direct replacement so I don't have to replace a bunch of other components except the hoses. At this point, I've basically replaced the whole cooling system except the pump.