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Robertshaw 370 series substitute hi flow thermostat

$30.99

Robertshaw 370 series substitute hi flow thermostat

$30.99

Sold out

Sadly Robertshaw no longer manufactures the 370 series.  The difference between the 370 Series and the 330 Series was the flange diameter.  Necessity is the mother of invention so we designed an interface ring that allows you to size up your 330 and get the benefit of high flow.

Fits Mopar, Some Ford, Lincoln, Mercury, AMC L6 Buick Nailhead

Why Robertshaw? Because we make a hi flow pump and its unique three port construction or "balanced sleeve" design equalizes the system pressures above and below the thermostat’s moving valve. Therefore the thermostat is pressure balanced and will respond to system temperatures only. No other thermostat does this.

Other Features of a Robert Shaw Thermostat:

1) Stress-free construction. Robertshaw makes the thermostat's strut assembly from brass, not stainless steel, because brass can be bradded to the housing with heat instead of sledge hammer-like stress. This technique permits two brads per strut. Other manufacturers forcefully attach the struts to the housing with intense, metal-weakening pressure on the struts, binding each strut in only one spot.

2) The Power Pill®. This is the heart of a Robertshaw thermostat. It detects minute changes in the temperature of the coolant, and quickly activates a precision-engineered stem or piston to open and close the thermostat valve.

3) One-piece bypass poppet. With other thermostats, the bypass valve stem is welded on. The weld tends to fail under stress. To eliminate this problem, Robertshaw manufactures the entire copper cup and bypass stem from a single piece of metal.

4) Short-stroke piston. In conventional thermostats, the piston must make a large stroke to open the thermostat far enough for adequate coolant flow. But the long stroke compromises durability. Robertshaw engineers achieved a shorter stroke with a uniquely-designed flange and poppet. This design increases the longevity of the thermostat, yet still allows adequate coolant circulation.

5) Contoured strut. Making the strut assembly from brass instead of steel provides another benefit: brass, being more malleable than steel, can be precisely formed to maximize coolant flow.

6) Uniform quality. Robertshaw builds all thermostats to OEM standards -- so your replacement thermostat is identical to those used in new Fords, Chryslers, and other cars. The Power Pill At the heart of a Robertshaw thermostat is the power pill. Its job: to detect minute changes in the temperature of the coolant, and to quickly activate a precision-engineered piston that opens and closes the thermostat valve. Compared to the thermal elements in some thermostats, Robertshaw's Power Pill® has major advantages:

1) Rapid response. The Power Pill's piston is activated by a temperature-sensitive mixture of metallic powder and wax. Some thermostats use an all-wax charge, which responds slowly to temperature changes. Other brands mix copper powder with the wax for faster response, but the copper quickly separates from the wax. Robertshaw developed a process to maintain suspension of the copper powder in the wax, so the fast response doesn't deteriorate and the thermostat will not "stick-open" to cause the engine to run cool.

2) Reliable performance. Most manufacturers use a one-piece rubber diaphragm to seal the charge and drive the piston. If the rubber part ruptures, the thermostat fails. Robertshaw uses two separate parts: a diaphragm to seal the wax, and a stem seat or plug that drives the piston. Rubber material for each part is formulated especially to meet each part's unique requirements. Wear or damage to the stem seat still allows the thermostat to operate satisfactorily.

3) Precise performance. Every Robertshaw Power Pill is calibrated to bring the thermostat's start-to-open temperature within strict tolerances.

Thermostat Applications

Make Year CID Liters
AMERICAN MOTORS 1959-1965 196 3.2
BUICK 1954-1955 264 4.3
BUICK 1953-1956 322 5.3
BUICK 1959-1966 401 6.6
BUICK 1963-1966 425 7
CADILLAC 1950-1955 331 5.4
CADILLAC 1956-1958 365 6
CADILLAC 1959-1962 390 6.4
CHEVROLET 1982-1993 379 6.2
CHRYSLER 1975-1978 318 5.2
CHRYSLER 1971-1980 360 5.9
CHRYSLER 1963-1964 361 5.9
CHRYSLER 1968-1971 383 6.3
CHRYSLER 1972-1978 400 6.6
CHRYSLER 1959-1965 413 6.8
CHRYSLER 1966-1978 440 7.2
DODGE 1949-1959 230 3.8
DODGE 1967-1969 273 4.5
DODGE 1970-1978 318 5.2
DODGE 1968-1973 340 5.6
DODGE 1971-1978 360 5.9
DODGE 1968-1971 383 6.3
DODGE 1972-1978 400 6.6
DODGE 1967-1971 426 7
DODGE 1967-1978 440 7.2
FORD 1963-1968 200 3.3
FORD 1954-1964 223 3.7
FORD 1954-1955 239 3.9
FORD 1954 256 4.2
FORD 1955-1957 272 4.5
FORD 1956-1964 292 4.8
FORD 1965-1967 352 5.8
FORD 1963-1966 390 6.4
FORD 1963-1966 427 7
FORD 1966 428 7
GMC 1982-1993 379 6.2
MERCURY 1961 223 3.7
MERCURY 1954 256 4.2
MERCURY 1955 292 4.8
MERCURY 1961-1962 292 4.8
MERCURY 1956-1957 312 5.1
MERCURY 1961-1962 352 5.8
MERCURY 1961-1966 390 6.4
MERCURY 1966 410 6.7
MERCURY 1965-1966 427 7
MERCURY 1966 428 7
MERCURY 1958-1959 430 7
PLYMOUTH 1949-1950 218 3.6
PLYMOUTH 1964-1969 273 4.5
PLYMOUTH 1963-1978 318 5.2
PLYMOUTH 1968-1973 340 5.6
PLYMOUTH 1971-1978 360 5.9
PLYMOUTH 1968-1971 383 6.3
PLYMOUTH 1972-1978 400 6.6
PLYMOUTH 1967-1977 440 7.2