HT4100 4.1, 4.5, 4.9 Discussion, 1st and 2nd design oil pressure switch? in Cadillac Engine Discussion; One has a 3/8 inch thread the other has a 1/4 inch. How can I tell the difference without pulling ...
- 07-07-12 02:06 PM #1Cadillac Owners Fanatic
- Automobile(s): 95 deville 4.9
- Join Date
- Mar 2012
1st and 2nd design oil pressure switch?
One has a 3/8 inch thread the other has a 1/4 inch. How can I tell the difference without pulling the switch? And also what would be the best replacement part for my 4.9?
- 07-08-12 01:37 PM #2
Re: 1st and 2nd design oil pressure switch?
Never heard of 2 different sizes. The oil lines and associated fittings should all be 3/8. In any case, you can simply buy the appropriate brass bushing at any hardware store to make the switch fit. Use teflon tape on the threads.
- 07-09-12 10:39 AM #3
Rock auto list two different sizes and so does the stealership
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