Water Neck w/ Internal Thermostat, Fiat 124 – (SKU 12-5304)

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$112.00

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Water Neck with Internal Thermostat

This is the thermostat used on the 2 radiator hose 124 Spiders. If you have 4 radiator hoses please read below.

Fits:

Fiat 124, Sedan, Wagon & Coupe

Fiat 124 Spider with 1438cc

*Note: All Fiat 124 Spiders with 4 radiator hoses use SKU 11-7381 External Thermostat. This would be 1608cc, 1756cc & 1995cc models, except the very first 1974 year 1756cc cars. WE DO NOT recommend switching over to the internal thermostat on later motors. They do not keep cylinder 4 as cool as the rest of the motor, and can cause failures, especially with larger displacements. The internal thermostat looks slick, but it ain’t worth it!*

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Why would this thermostat housing cause the #4 cylinder to run hotter the the external "by-pass" type thermostat? Are you suggesting the thermostat in this housing restricts coolant flow back to the radiator? (I'm a long term parts buyer from you) Mike Finta asked on December 12, 2024

Hello,

Honestly this is a little too much to explain in this format if you wish to discuss this more in depth we should talk on the phone.
But long story short yes with the internal thermostat it does have less flow on the back of the block.

Best
Vick Autosports

Matt Phillips answered on December 13, 2024 store manager
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Make Model Year
Make Model Year
FIAT 124 Sedan / Special / Familiare 1966
FIAT 124 Sedan / Special / Familiare 1967
FIAT 124 Sedan / Special / Familiare 1968
FIAT 124 Sedan / Special / Familiare 1969
FIAT 124 Sedan / Special / Familiare 1970
FIAT 124 Sedan / Special / Familiare 1971
FIAT 124 Sedan / Special / Familiare 1972
FIAT 124 Sedan / Special / Familiare 1973
FIAT 124 Sedan / Special / Familiare 1974
FIAT 124 Special T (DOHC) 1970
FIAT 124 Special T (DOHC) 1971
FIAT 124 Special T (DOHC) 1972
FIAT 124 Special T (DOHC) 1973
FIAT 124 Special T (DOHC) 1974
FIAT 124 Sport Coupe 1968
FIAT 124 Sport Coupe 1969
FIAT 124 Sport Coupe 1970
FIAT 124 Sport Coupe 1971
FIAT 124 Sport Coupe 1972
FIAT 124 Sport Coupe 1973
FIAT 124 Sport Coupe 1974
FIAT 124 Sport Coupe 1975
FIAT 124 Sport Spider 1968
FIAT 124 Sport Spider 1969
FIAT 124 Sport Spider 1970
FIAT 124 Sport Spider 1971
FIAT 124 Sport Spider 1972
FIAT 124 Sport Spider 1973
FIAT 124 Sport Spider 1974
FIAT 850 Spider / Sedan / Coupe 1964
FIAT 850 Spider / Sedan / Coupe 1965
FIAT 850 Spider / Sedan / Coupe 1966
FIAT 850 Spider / Sedan / Coupe 1967
FIAT 850 Spider / Sedan / Coupe 1968
FIAT 850 Spider / Sedan / Coupe 1969
FIAT 850 Spider / Sedan / Coupe 1970
FIAT 850 Spider / Sedan / Coupe 1971
FIAT 850 Spider / Sedan / Coupe 1972
FIAT 850 Spider / Sedan / Coupe 1973
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