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Home > Technical Chat > Oil filter head thread size?

paul25

68 Posts
Member #: 596
Advanced Member

Hi there,

Does anyone know the thread size for the adaptor that screws into the filter head?? I know that the portion that screws into the filter head is 1/4"NPT but what size is the upper thread? I have conflicting information...some say 9/16UNF others 5/8UNF.


jimmy

1300 Posts
Member #: 829
Post Whore

essex

when i fitted 13 row oil cooler to my engine i found the filter head a 1/4 BSP fitted nice and the block end was 5/8UNF my engine is 1275 if you are using the car all year round i would fit a oilstat to help the engine warm up in the colder months

1293 Turbo mini

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