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.

Make	CID	Ltr	Year
AM GENERAL	395	6.5	1996-2000
AMERICAN MOTORS	196	3.2	1961-1970
AMERICAN MOTORS	232	3.8	1965-1979
AMERICAN MOTORS	258	4.2	1976-1988
AMERICAN MOTORS	304	5.0	1970-1979
AMERICAN MOTORS	343	5.6	1967-1969
AMERICAN MOTORS	360	5.9	1970-1978
AMERICAN MOTORS	390	6.4	1969-1970
AMERICAN MOTORS	401	6.6	1971-1974
BUICK	173	2.8	1980-1986
BUICK	181	3.0	1982-1985
BUICK	196	3.2	1978-1979
BUICK	231	3.8	1978-1985
BUICK	250	4.1	1968-1975
BUICK	252	4.1	1980-1984
BUICK	260	4.3	1975-1984
BUICK	265	4.3	1980-1981
BUICK	267	4.4	1981-1982
BUICK	300	4.9	1964-1967
BUICK	301	4.9	1977-1980
BUICK	305	5.0	1977-1991
BUICK	307	5.0	1980-1990
BUICK	340	5.6	1966-1967
BUICK	350	5.7	1968-1995
BUICK	400	6.6	1967-1969
BUICK	403	6.6	1975-1979
BUICK	430	7.1	1967-1969
BUICK	455	7.5	1969-1976
CADILLAC	250	4.1	1987-1988
CADILLAC	252	4.1	1980-1982
CADILLAC	260	4.3	1985
CADILLAC	273	4.5	1988-1992
CADILLAC	300	4.9	1991-1994
CADILLAC	305	5.0	1991-1992
CADILLAC	307	5.0	1986-1990
CADILLAC	350	5.7	1978-1995
CADILLAC	390	6.4	1963
CADILLAC	429	7.0	1964-1967
CHECKER	229	3.8	1980-1982
CHECKER	230	3.8	1968
CHECKER	250	4.1	1969-1979
CHECKER	267	4.4	1980-1982
CHECKER	305	5.0	1978-1982
CHECKER	307	5.0	1968
CHECKER	327	5.4	1968-1969
CHECKER	350	5.7	1969-1982
CHEVROLET	173	2.8	1980-1986
CHEVROLET	194	3.2	1962-1966
CHEVROLET	196	3.2	1978-1979
CHEVROLET	200	3.3	1978-1979
CHEVROLET	229	3.8	1980-1984
CHEVROLET	230	3.8	1963-1970
CHEVROLET	231	3.8	1978-1987
CHEVROLET	235	3.9	1955-1962
CHEVROLET	250	4.1	1972-1984
CHEVROLET	260	4.3	1982-1985
CHEVROLET	262	4.3	1975-1994
CHEVROLET	265	4.3	1955-1957
CHEVROLET	267	4.4	1979-1982
CHEVROLET	283	4.6	1957-1967
CHEVROLET	292	4.8	1973-1989
CHEVROLET	305	5.0	1976-1995
CHEVROLET	307	5.0	1968-1990
CHEVROLET	327	5.4	1962-1969
CHEVROLET	348	5.7	1958-1961
CHEVROLET	350	5.7	1969-1995
CHEVROLET	395	6.5	1996-2000
CHEVROLET	396	6.5	1968-1970
CHEVROLET	400	6.6	1971-1980
CHEVROLET	402	6.6	1971-1972
CHEVROLET	409	6.7	1961-1965
CHEVROLET	427	7.0	1966-1969
CHEVROLET	454	7.4	1973-1990
DODGE	170	2.8	1961-1968
DODGE	225	3.7	1961-1968
DODGE	318	5.2	1979-1980
DODGE	360	5.9	1979-1980
DODGE	440	7.2	1979
EAGLE	150	2.5	1989
FORD	144	2.4	1960-1964
FORD	170	2.8	1960-1972
FORD	200	3.3	1963-1983
FORD	221	3.6	1963-1984
FORD	232	3.8	1982-1984
FORD	240	3.9	1965-1974
FORD	242	4.0	1968-1969
FORD	250	4.1	1969-1980
FORD	255	4.2	1980-1982
FORD	260	4.3	1963-1964
FORD	289	4.7	1963-1968
FORD	300	4.9	1968-1994
FORD	302	5.0	1968-1989
FORD	351	5.8	1975-1989
FORD	360	5.9	1968-1976
FORD	390	6.4	1967-1976
FORD	420	6.9	1983-1987
FORD	427	7.0	1967-1969
FORD	428	7.0	1967-1970
FORD	429	7.0	1968-1973
FORD	445	7.3	1988-1994
FORD	460	7.5	1972-1994
GMC	200	3.3	1978-1979
GMC	229	3.8	1980-1984
GMC	231	3.8	1978-1984
GMC	250	4.1	1973-1984
GMC	262	4.3	1985-1994
GMC	267	4.4	1980-1982
GMC	292	4.8	1973-1989
GMC	305	5.0	1976-1994
GMC	350	5.7	1969-1994
GMC	395	6.5	1996-2000
GMC	400	6.6	1975-1980
GMC	454	7.4	1973-1990
JEEP	126	2.1	1986
JEEP	134	2.1	1946, 1961-1983
JEEP	150	2.5	1984-2002
JEEP	225	3.7	1968-1974
JEEP	226	3.7	1962-1963
JEEP	230	3.8	1962-1990
JEEP	232	3.8	1976-1986
JEEP	242	4.0	1989-2006
JEEP	258	4.2	1972-2006
JEEP	304	5.0	1972-1981
JEEP	350	5.7	1969-1973
JEEP (but not grand cherokee)	360	5.9	1972-1991
JEEP	401	6.6	1974-1978
LINCOLN	232	3.8	1982
LINCOLN	302	5.0	1977-1982
LINCOLN	351	5.8	1980
LINCOLN	460	7.5	1969-1978
MERCEDES-BENZ	116	1.9	1960-1963
MERCURY	144	2.4	1962-1963
MERCURY	170	2.8	1962-1972
MERCURY	200	3.3	1968-1983
MERCURY	221	3.6	1962-1963
MERCURY	232	3.8	1982-1983
MERCURY	250	4.1	1969-1980
MERCURY	255	4.2	1980-1982
MERCURY	260	4.3	1963-1964
MERCURY	289	4.7	1964-1968
MERCURY	302	5.0	1969-1986
MERCURY	351	5.8	1970-1986
MERCURY	390	6.4	1967-1970
MERCURY	410	6.7	1967
MERCURY	427	7.0	1967-1968
MERCURY	428	7.0	1967-1970
MERCURY	429	7.0	1969-1973
MERCURY	460	7.5	1972-1978
OLDSMOBILE	151	2.5	1982-1992
OLDSMOBILE	173	2.8	1980-1986
OLDSMOBILE	181	3.0	1982-1985
OLDSMOBILE	215	3.5	1961-1963
OLDSMOBILE	225	3.7	1964-1965
OLDSMOBILE	231	3.8	1975-1987
OLDSMOBILE	250	4.1	1973-1976
OLDSMOBILE	252	4.1	1981-1984
OLDSMOBILE	260	4.3	1975-1985
OLDSMOBILE	262	4.3	1991-1992
OLDSMOBILE	267	4.4	1981-1982
OLDSMOBILE	305	5.0	1977-1992
OLDSMOBILE	307	5.0	1980-1990
OLDSMOBILE	330	5.4	1964-1967
OLDSMOBILE	350	5.7	1975-1992
OLDSMOBILE	371	6.1	1957-1959
OLDSMOBILE	394	6.5	1961-1964
OLDSMOBILE	400	6.6	1965-1975
OLDSMOBILE	403	6.6	1977-1979
OLDSMOBILE	425	7.0	1965-1967
OLDSMOBILE	455	7.5	1972-1976
PLYMOUTH	318	5.2	1979-1980
PLYMOUTH	360	5.9	1979
PONTIAC	140	2.3	1975-1976
PONTIAC	173	2.8	1980-1986
PONTIAC	215	3.5	1964-1965
PONTIAC	229	3.8	1980-1983
PONTIAC	230	3.8	1966-1967
PONTIAC	231	3.8	1976-1987
PONTIAC	239	3.9	1946-1954
PONTIAC	249	4.1	1946-1949
PONTIAC	250	4.1	1972-1976
PONTIAC	252	4.1	1982
PONTIAC	260	4.3	1975-1985
PONTIAC	262	4.3	1985-1987
PONTIAC	265	4.3	1980-1981
PONTIAC	267	4.4	1981-1982
PONTIAC	268	4.4	1950-1954
PONTIAC	287	4.7	1955
PONTIAC	301	4.9	1977-1981
PONTIAC	305	5.0	1977-1992
PONTIAC	307	5.0	1981-1989
PONTIAC	316	5.2	1956
PONTIAC	326	5.3	1963-1967
PONTIAC	347	5.7	1957
PONTIAC	350	5.7	1972-1992
PONTIAC	370	6.1	1958
PONTIAC	389	6.4	1965-1966
PONTIAC	400	6.6	1972-1979
PONTIAC	403	6.6	1977-1979
PONTIAC	421	6.9	1963-1966
PONTIAC	428	7.0	1967-1969
PONTIAC	455	7.5	1972-1976

The model list of applications for this thermostat series is so extensive it cannot be part of the search functionality. It is included here for the secondary site search feature.

190sl, 442, 6000, 88, a100, allante, ambassador, amx, apollo, astre, astro, b100 van, b200 van, b300 van, bel air, belvedere, biscayne, blazer, bonneville, bravada, bronco, brookwood, brougham, c10 pickup, c10 suburban, c15/c1500 pickup, c15/c1500 suburban, c1500 pickup, c1500 suburban, c20 pickup, c20 suburban, c25/c2500 pickup, c25/c2500 suburban, c2500 pickup, c2500 suburban, c30 pickup, c35/c3500 pickup, c3500 pickup, caballero, calais, caliente, camaro, capri, caprice, caravelle, catalina, cb300, celebrity, centurion, century, charger, cherokee, chevelle, chevy ii, chieftain, citation, cj7, classic, club, club wagon, cobra, colony park, comanche, comet, commuter, concord, continental, coronet, corvette, cougar, country cruiser, country sedan, country squire, custom, custom 500, custom cruiser, cutlass, cutlass calais, cutlass ciera, cutlass cruiser, cutlass supreme, cyclone, d100 pickup, d100 series, d150 pickup, d200 pickup, d200 series, d300 pickup, d300 series, d350 pickup, d400 pickup, d450 pickup, dart, del ray, delmont 88, delta 88, deluxe, deville, diplomat, dj5, dj6, duster, dynamic, e-100 econoline, e-150 econoline, e-200 econoline, e-250 econoline, e-300 econoline, e-350 econoline, eagle, econoline, el camino, eldorado, electra, estate wagon, executive, express 2500, f-100 pickup, f-150 pickup, f-250 pickup, f-350 pickup, f-450 super duty pickup, f53 stripped chassis, f59 stripped chassis, f85, fairlane, fairmont, falcon, falcon sedan delivery, fc170, fiesta, firebird, fleetwood, ford 300, fury, fury i, fury ii, fury iii, g10 van, g15/g1500 van, g20 van, g25/g2500 van, g2500 van, g30 van, g35/g3500 van, g3500 van, galaxie, galaxie 500, gladiator, gran fury, gran sport, gran torino, granada, grand am, grand cherokee, grand lemans, grand marquis, grand prix, grand safari, grand wagoneer, grandville, gremlin, gs, gs 400, gs 455, gto, hornet, hummer, impala, j10, j-100, j20, j-2500, j-2600, j-2700, j-3500, j-3600, j-3700, j-3800, javelin, jeep, jeepster, jetfire, jetstar 88, jimmy, k10 pickup, k10 suburban, k15/k1500 pickup, k15/k1500 suburban, k1500 pickup, k1500 suburban, k20 pickup, k20 suburban, k25/k2500 pickup, k25/k2500 suburban, k2500 pickup, k2500 suburban, k30 pickup, k35/k3500 pickup, k3500 pickup, kingswood, laguna, lancer, laurentian, lemans, lesabre, ltd, ltd ii, m-400, m-450, magnum, malibu, marathon, marauder, mark iii, mark iv, mark v, mark vi, marlin, marquis, matador, maverick, meteor, monarch, montclair, monte carlo, montego, monterey, monza, mustang, mustang ii, nova, omega, one-fifty series, p10 series, p10 van, p100, p-100, p15/p1500 van, p20 series, p20 van, p200, p25/p2500 van, p30 series, p30 van, p300, p35/p3500 van, p-350, pacer, parisienne, park lane, pb100 van, pb150 van, pb200 van, pb250 van, pb300 van, pb350 van, phoenix, polara, premier, r10 pickup, r10 suburban, r1500 pickup, r1500 suburban, r20 pickup, r20 suburban, r2500 pickup, r2500 suburban, r30 pickup, r3500 pickup, rambler, ramcharger, ranch wagon, ranchero, regal, riviera, roadmaster, rogue, s10 blazer, s10 pickup, s15 jimmy, s15 pickup, s15 sonoma, s15 syclone, s15 typhoon, safari, savana 2500, savana 3500, scrambler, series 62, series 75 fleetwood, seville, skyhawk, skylark, special, spirit, sportwagon, sprint, st. regis, star chief, starfire, streamliner, suburban, sunbird, sunliner, super 88, super chief, super six, tahoe, tempest, thunderbird, torino, tornado, toronado, torpedo, town car, townsman, trailduster, truck, two-ten series, universal, v10 suburban, v1500 pickup, v1500 suburban, v20 pickup, v20 suburban, v2500 pickup, v2500 suburban, v30 pickup, v3500 pickup, ventura, versailles, victoria, villager, vista cruiser, volare, voyager, w100 pickup, w100 series, w150 pickup, w200 pickup, w200 series, w300 pickup, w300 series, wagoneer, wildcat, wrangler, yukon, zephyr