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Robertshaw 333 Series hi flow balanced sleeve thermostat
$39.78
Robertshaw 333 Series hi flow balanced sleeve thermostat
$39.78
The Robertshaw 333 series thermostat has the distinction of being the only available thermostat that would accommodate the 351 Cleveland Controlled bypass system*. A 351C provided greater water flow in the engine for a faster, more even warm-up without creating hot spots (particularly in the valve area). The bypass design controlled the water flow and temperature with less cycling and increased the flow to the radiator for improved cooling performance. It was an ideal solution for overheating 351C found in mustangs and hot Panteras.
The OE Robertshaw thermostats for the OE bypass is available again. Its made in the USA. Yes this is a real Robertshaw 333 series. If you want 160 degree alternative, consider the 333-substitute
The substitute performs the same preheat function but we resized the bypass hole for more temperature options.
*The 400 and 351M had this feature cast into the block and did not utilize this brass bypass insert. The cast bypass hole requires the 333 series.
| Year | Make | Model | Eng | CID | VIN |
|---|---|---|---|---|---|
| 1978-1979 | FORD | BRONCO | V8 | 351 | H |
| 1984 | FORD | BRONCO | V8 | 351 | H |
| 1970-1971 | FORD | COBRA | V8 | 351 | M |
| 1971 | FORD | COBRA | V8 | 351 | H |
| 1970-1974 | FORD | COUNTRY SEDAN | V8 | 351 | H |
| 1972-1974 | FORD | COUNTRY SEDAN | V8 | 400 | S |
| 1970-1974 | FORD | COUNTRY SQUIRE | V8 | 351 | H |
| 1979 | FORD | COUNTRY SQUIRE | V8 | 351 | H |
| 1972-1974 | FORD | COUNTRY SQUIRE | V8 | 400 | S |
| 1975-1976 | FORD | COUNTRY SQUIRE | V8 | 400 | S |
| 1970-1972 | FORD | CUSTOM | V8 | 351 | H |
| 1972 | FORD | CUSTOM | V8 | 400 | S |
| 1970-1974 | FORD | CUSTOM 500 | V8 | 351 | H |
| 1976-1977 | FORD | CUSTOM 500 | V8 | 351 | H |
| 1972-1974 | FORD | CUSTOM 500 | V8 | 400 | S |
| 1975-1977 | FORD | CUSTOM 500 | V8 | 400 | S |
| 1976-1979 | FORD | E-100 ECONOLINE | V8 | 351 | H |
| 1976-1979 | FORD | E-150 ECONOLINE | V8 | 351 | H |
| 1980-1984 | FORD | E-150 ECONOLINE | V8 | 351 | G |
| 1976-1979 | FORD | E-250 ECONOLINE | V8 | 351 | H |
| 1980-1984 | FORD | E-250 ECONOLINE | V8 | 351 | G |
| 1984 | FORD | E-250 ECONOLINE | V8 | 351 | H |
| 1981 | FORD | E-250 ECONOLINE | V8 | 400 | Z |
| 1976-1979 | FORD | E-350 ECONOLINE | V8 | 351 | H |
| 1980-1984 | FORD | E-350 ECONOLINE | V8 | 351 | G |
| 1981-1982 | FORD | E-350 ECONOLINE | V8 | 400 | Z |
| 1977-1979 | FORD | F-100 PICKUP | V8 | 351 | H |
| 1981 | FORD | F-100 PICKUP | V8 | 351 | G |
| 1978-1979 | FORD | F-100 PICKUP | V8 | 400 | S |
| 1977-1978 | FORD | F-150 PICKUP | V8 | 351 | H |
| 1978-1979 | FORD | F-150 PICKUP | V8 | 400 | S |
| 1979 | FORD | F-150 PICKUP | V8 | 351 | H |
| 1981-1984 | FORD | F-150 PICKUP | V8 | 351 | G |
| 1984 | FORD | F-150 PICKUP | V8 | 351 | H |
| 1977-1979 | FORD | F-250 PICKUP | V8 | 351 | H |
| 1980-1984 | FORD | F-250 PICKUP | V8 | 351 | G |
| 1984 | FORD | F-250 PICKUP | V8 | 351 | H |
| 1978-1979 | FORD | F-250 PICKUP | V8 | 400 | S |
| 1981-1982 | FORD | F-250 PICKUP | V8 | 400 | Z |
| 1978-1979 | FORD | F-350 PICKUP | V8 | 351 | H |
| 1980-1984 | FORD | F-350 PICKUP | V8 | 351 | G |
| 1978-1979 | FORD | F-350 PICKUP | V8 | 400 | S |
| 1980-1982 | FORD | F-350 PICKUP | V8 | 400 | Z |
| 1970 | FORD | FAIRLANE | V8 | 351 | H |
| 1970 | FORD | FAIRLANE | V8 | 351 | M |
| 1970 | FORD | FALCON | V8 | 351 | M |
| 1971-1974 | FORD | GALAXIE 500 | V8 | 351 | H |
| 1972-1974 | FORD | GALAXIE 500 | V8 | 400 | S |
| 1972-1974 | FORD | GRAN TORINO | V8 | 351 | H |
| 1976 | FORD | GRAN TORINO | V8 | 351 | H |
| 1972-1974 | FORD | GRAN TORINO | V8 | 351 | Q |
| 1972-1974 | FORD | GRAN TORINO | V8 | 400 | S |
| 1975-1976 | FORD | GRAN TORINO | V8 | 400 | S |
| 1976-1977 | FORD | GRANADA | V8 | 351 | H |
| 1970-1974 | FORD | LTD | V8 | 351 | H |
| 1976-1979 | FORD | LTD | V8 | 351 | H |
| 1972-1974 | FORD | LTD | V8 | 400 | S |
| 1975-1978 | FORD | LTD | V8 | 400 | S |
| 1978-1979 | FORD | LTD II | V8 | 351 | H |
| 1977-1978 | FORD | LTD II | V8 | 400 | S |
| 1971-1973 | FORD | MUSTANG | V8 | 351 | H |
| 1970-1971 | FORD | MUSTANG | V8 | 351 | M |
| 1972-1973 | FORD | MUSTANG | V8 | 351 | Q |
| 1970-1974 | FORD | RANCH WAGON | V8 | 351 | H |
| 1972-1974 | FORD | RANCH WAGON | V8 | 400 | S |
| 1975-1976 | FORD | RANCH WAGON | V8 | 400 | S |
| 1970-1974 | FORD | RANCHERO | V8 | 351 | H |
| 1976-1979 | FORD | RANCHERO | V8 | 351 | H |
| 1970-1971 | FORD | RANCHERO | V8 | 351 | M |
| 1972-1974 | FORD | RANCHERO | V8 | 351 | Q |
| 1973-1974 | FORD | RANCHERO | V8 | 400 | S |
| 1975-1978 | FORD | RANCHERO | V8 | 400 | S |
| 1978-1979 | FORD | THUNDERBIRD | V8 | 351 | H |
| 1977-1978 | FORD | THUNDERBIRD | V8 | 400 | S |
| 1970-1974 | FORD | TORINO | V8 | 351 | H |
| 1976 | FORD | TORINO | V8 | 351 | H |
| 1970-1971 | FORD | TORINO | V8 | 351 | M |
| 1972-1974 | FORD | TORINO | V8 | 351 | Q |
| 1973-1974 | FORD | TORINO | V8 | 400 | S |
| 1975-1976 | FORD | TORINO | V8 | 400 | S |
| 1978-1979 | LINCOLN | CONTINENTAL | V8 | 400 | S |
| 1978-1979 | LINCOLN | MARK V | V8 | 400 | S |
| 1971-1973 | MERCURY | COLONY PARK | V8 | 351 | H |
| 1979 | MERCURY | COLONY PARK | V8 | 351 | H |
| 1972-1976 | MERCURY | COLONY PARK | V8 | 400 | S |
| 1971-1974 | MERCURY | COUGAR | V8 | 351 | H |
| 1975-1979 | MERCURY | COUGAR | V8 | 351 | H |
| 1970-1971 | MERCURY | COUGAR | V8 | 351 | M |
| 1972-1974 | MERCURY | COUGAR | V8 | 351 | Q |
| 1974-1978 | MERCURY | COUGAR | V8 | 400 | S |
| 1971 | MERCURY | CYCLONE | V8 | 351 | H |
| 1970-1971 | MERCURY | CYCLONE | V8 | 351 | M |
| 1979 | MERCURY | GRAND MARQUIS | V8 | 351 | H |
| 1976-1978 | MERCURY | GRAND MARQUIS | V8 | 400 | S |
| 1972-1973 | MERCURY | MARQUIS | V8 | 351 | H |
| 1978-1979 | MERCURY | MARQUIS | V8 | 351 | H |
| 1972-1978 | MERCURY | MARQUIS | V8 | 400 | S |
| 1976-1977 | MERCURY | MONARCH | V8 | 351 | H |
| 1971-1974 | MERCURY | MONTEGO | V8 | 351 | H |
| 1975-1976 | MERCURY | MONTEGO | V8 | 351 | H |
| 1970-1971 | MERCURY | MONTEGO | V8 | 351 | M |
| 1972-1974 | MERCURY | MONTEGO | V8 | 351 | Q |
| 1973-1976 | MERCURY | MONTEGO | V8 | 400 | S |
| 1971-1973 | MERCURY | MONTEREY | V8 | 351 | H |
| 1972-1974 | MERCURY | MONTEREY | V8 | 400 | S |
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