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| Leaking oil pressure switch https://www.ausmini.com/forums/viewtopic.php?f=2&t=91114 |
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| Author: | sociallydisabled [ Wed Nov 25, 2015 6:58 am ] |
| Post subject: | Leaking oil pressure switch |
Hey guys! Purchased a 73 mini with a 1098 (I think, eng prefix 1001) and I've noticed theres an oil leak around the oil pressure switch. It seems to be coming out between the switch and the block. Is there a gasket? Can I just put some sealant on the thread? Or should I replace the switch? What size spanner/socket fits over it? Thanks  pics of car to come soon!Adam 
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| Author: | goodie [ Wed Nov 25, 2015 7:19 am ] |
| Post subject: | Re: Leaking oil pressure switch |
Clean around the area with a bit of degreaser to see exactly where the leak is coming from , more than likely coming from the threaded section of the switch , albeit they can leak from the switch itself . They don't have a gasket, you can use some liquid sealent around the thread . |
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| Author: | sociallydisabled [ Wed Nov 25, 2015 7:52 am ] |
| Post subject: | Re: Leaking oil pressure switch |
Thanks, mate. I can definitely see it weeping out from below the "head" where the spanner goes to tighten it. Will wack some goo on the thread
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| Author: | 1018cc [ Wed Nov 25, 2015 8:19 am ] |
| Post subject: | Re: Leaking oil pressure switch |
I'm pretty sure the thread is 1/8" NPT - national pipe taper. It shouldn't nead a gasket as the thread is tapered. If anything, some medium loctite or similar should seal any gaps in the thread / try some plumbers teflon tape to seal it up. |
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| Author: | sociallydisabled [ Wed Nov 25, 2015 8:38 am ] |
| Post subject: | Re: Leaking oil pressure switch |
Looks like the switch is only $11. Might just be worth getti ng a new one |
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| Author: | drmini in aust [ Wed Nov 25, 2015 8:49 am ] |
| Post subject: | Re: Leaking oil pressure switch |
1018cc wrote: I'm pretty sure the thread is 1/8" NPT - national pipe taper. It shouldn't nead a gasket as the thread is tapered. If anything, some medium loctite or similar should seal any gaps in the thread / try some plumbers teflon tape to seal it up. Nope the thread in the block is definitely 1/8 BSP, parallel. A 1/8 NPT one (very common aftermarket switch) will screw in a bit, but is prone to leak. The NPT thread is bigger, and 1 tpi different. I'd try some sealant (NOT teflon tape!) but if still leaking, buy the right one. |
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| Author: | 1018cc [ Wed Nov 25, 2015 9:06 am ] |
| Post subject: | Re: Leaking oil pressure switch |
I stand corrected then! Looks like I've been using the wrong ones for ages! |
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| Author: | sociallydisabled [ Wed Nov 25, 2015 9:19 am ] |
| Post subject: | Re: Leaking oil pressure switch |
Is it a part I can get from repco, or am I better off heading out to mini king? |
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| Author: | 1018cc [ Wed Nov 25, 2015 10:00 am ] |
| Post subject: | Re: Leaking oil pressure switch |
The ones you get from Repco are the ones like I have that are 1/8 NPT not 1/8 BSP as that is where I got mine from to replace my old one that didn't earth out anymore. |
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| Author: | sociallydisabled [ Wed Nov 25, 2015 10:46 am ] |
| Post subject: | Re: Leaking oil pressure switch |
Ta. Mini king it is
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| Author: | drmini in aust [ Wed Nov 25, 2015 11:41 am ] |
| Post subject: | Re: Leaking oil pressure switch |
A 1/8 BSP dienut is a handy thing to have. The British car industry never standardised properly on threads in the 60s, a Mini hydraulic stoplight switch is 1/8 BSP. A Hillman Imp one (looks almost same but NLA) is 3/8 UNF, go figure. (so my 3/8 UNF dienut was handy for my bro' too!) |
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| Author: | simon k [ Wed Nov 25, 2015 7:02 pm ] |
| Post subject: | Re: Leaking oil pressure switch |
probably just needs a new copper washer |
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| Author: | sociallydisabled [ Wed Nov 25, 2015 8:34 pm ] |
| Post subject: | Re: Leaking oil pressure switch |
How do I even get a bloody tool on it! |
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| Author: | bluewhitecoopers1968 [ Wed Nov 25, 2015 8:45 pm ] |
| Post subject: | Re: Leaking oil pressure switch |
sociallydisabled wrote: How do I even get a bloody tool on it! Smaller tool is needed, mine fits ok. |
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| Author: | simon k [ Wed Nov 25, 2015 9:14 pm ] |
| Post subject: | Re: Leaking oil pressure switch |
deep socket? take the oil line off and use a spanner? |
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