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Ported vacuum switch temperature and stores to buy
Hello! How are you!
I want to change the PORTED VACUUM SWITCH OF TWO valves that goes on the base of thermostat of the motor 351 "M" (pick up Ford Ranger F-150 year 1981 version "Trailer Special").
It is the Ford D8TE-B2B part (original), with two valves (3/16 in. ported vacuum switch hose sizeand and 3/8 x 18 in. NPTF ported vacuum switch thread size).
1). Can you please inform me what FACTORY TEMPERATURE is indicated for this switch (D8TE-B2B)? Since nothing is indicated in it (unlike the other switch -celest- that indicated a temperature of 128 degrees). It can be read that the indication of "95" inscribed on the automotive part - black color - indicates "95" "degrees Faherenheit?
2). Which are the best stores to buy Ford auto parts or those of other brands that can be replaced? In addition to NAPA, AutoZone and RockAuto.
Thank you.
Greetings. Thermostate housing. Ford part D7BE-A1A or D7BE-AIA. "95" degrees?
When I looked for this part, I did not find a reference to the temperature.
I did find that there are many variations, and one or two that show to be specifically for your model truck. And those look almost exactly like the picture you posted.
For a part like this, one with the same look that is listed for your truck is probably safe, and NAPA, AutoZone or RockAuto and even O'Reilly's would be a safe source if you can not find a Ford part.
When I looked for this part, I did not find a reference to the temperature.
I did find that there are many variations, and one or two that show to be specifically for your model truck. And those look almost exactly like the picture you posted.
For a part like this, one with the same look that is listed for your truck is probably safe, and NAPA, AutoZone or RockAuto and even O'Reilly's would be a safe source if you can not find a Ford part.
Good luck!
To find the correct Ford parts, the Calibration Code will be required.
I initially looked them up in the 1973/79 catalog (both have 1970's ID numbers), but to verify what 1980 and later trucks used them, I'll need the code, because there no application charts after 1979.
To find the correct Ford parts, the Calibration Code will be required.
I initially looked them up in the 1973/79 catalog (both have 1970's ID numbers), but to verify what 1980 and later trucks used them, I'll need the code, because there no application charts after 1979.
He means a long number on the emissions sticker on the radiator, or there may be a sticker on the valve cover, usually not readable or painted over.
The 95 should be the temp that it actuates in F. That should be the EGR vacuum control valve. All factory Ford ported vacuum switches / thermal vacuum valves have the temp stamped on the sensor or on the flats of the brass.
The largest supplier aftermarket for these switches is Tomco.
Here is a link to their thermal vacuum valve catalog.
Once you have the Tomco PT# of the one you need any decent auto parts store should be able to cross reference it.
I haven't checked lately, but you used to be able to get these thermal vacuum valves for the GM models easily, and I had a couple of the models memorized. They had two ports, the valve that was yellow would pass vacuum until the water got about 100 degrees and then block it, the purple one would block the vacuum till about 100 degrees and then pass the vacuum. The purple one was good for EGR valves, the yellow one was good for the exhaust heat riser in the exhaust manifold. If you look up a 1979 monte carlo you can see if they still sell these valves.
Ford used some valves with 3 and 4 ports. I have never wrapped my head around how those work.
I haven't checked lately, but you used to be able to get these thermal vacuum valves for the GM models easily, and I had a couple of the models memorized. They had two ports, the valve that was yellow would pass vacuum until the water got about 100 degrees and then block it, the purple one would block the vacuum till about 100 degrees and then pass the vacuum. The purple one was good for EGR valves, the yellow one was good for the exhaust heat riser in the exhaust manifold. If you look up a 1979 monte carlo you can see if they still sell these valves.
Ford used some valves with 3 and 4 ports. I have never wrapped my head around how those work.
Ford 3 port were likely distributor out the middle and ported into the top and manifold vacuum into the bottom. The shuttle valve would send mani or ported vacuum to the distributor depending on how warm the valve/engine coolant was. Cold was ported carb vac while warm was mani vacuum. 4 port could have been 2 different circuits on 2 different temperatures. Some of the 3 ports were actually 2 ports with a vent as the 3rd port while some 2 ports had a bottle cap on the end that was the vent to allow the device (ie purge control valve) to relax when the vacuum signal was cut off. It allowed the Purge Control Valve to see open (canister would be sealed) while it was not warmed yet as you would not want that controlled vacuum leak to affect a cold engine.
01-13-2019, 06:17 PM
