Temp sensor sealant options
05-15-2012, 04:01 PM
#1
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Temp sensor sealant options
Hey folks, gotta question.
So I got that Nissan Temp sensor that kicks on at a lower temp with the two wires. Problem is now that when torqued down, the gasket squishes out and becomes ineffective once hot, seeping coolant:
As you can see, the gasket is all squashed out. The factory one seems to have a smaller diameter gasket recessed in a groove:
So my question is this: Whats the best sealant method for this application? Copper or bronze crush washer? Thread sealant tape? Liquid 'insta' gasket stuff? How about a combination of both or all?
Coolant is becoming expensive at this rate LOL, so this next time I'm hoping whatever we can decide on will be a permanent solution.
Thanks in advance for the input!!
So I got that Nissan Temp sensor that kicks on at a lower temp with the two wires. Problem is now that when torqued down, the gasket squishes out and becomes ineffective once hot, seeping coolant:
As you can see, the gasket is all squashed out. The factory one seems to have a smaller diameter gasket recessed in a groove:
So my question is this: Whats the best sealant method for this application? Copper or bronze crush washer? Thread sealant tape? Liquid 'insta' gasket stuff? How about a combination of both or all?
Coolant is becoming expensive at this rate LOL, so this next time I'm hoping whatever we can decide on will be a permanent solution.
Thanks in advance for the input!!
05-15-2012, 04:06 PM
#2
Seasoned tech
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I like the thread sealant in a tube. Or thred tape. Either should work. The stuff in a tube will be less likely to mess with the grounding of the sensor if it uses a ground through the threads but I don't think that's the case if it's a 2 wire sensor so it should be fine either way.
05-15-2012, 04:12 PM
#3
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Yeah its a two wire...so your for the tape and some liquid gasket...cool.
Already got the gasket stuff (orange/red, high temp stuff) so I guess I gotta 'borrow' some sealant tape from work LOL. Thanks for the quick-*** reply!!
Already got the gasket stuff (orange/red, high temp stuff) so I guess I gotta 'borrow' some sealant tape from work LOL. Thanks for the quick-*** reply!!
05-15-2012, 07:30 PM
#5
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What temp does it open at? Mine is now 87C which is like 189ish F. How much was it?
I gotta think a crush washer would be the permanent fix. Coating the threads may also work, not sure how hot teflon tape withstands.
Oh BTW... that is a fan switch. Temp sensor is for the guage.
I gotta think a crush washer would be the permanent fix. Coating the threads may also work, not sure how hot teflon tape withstands.
Oh BTW... that is a fan switch. Temp sensor is for the guage.
05-16-2012, 04:23 AM
#6
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Joe, Damn...Ok..I tried lol
An thanks for all the info guys! An green loctite? Gotta look that one up
Oh yeah an Joe, couldn't tell ya what temp, just that its def before the halfway point on the oil? Coolant? Temp gauge...i can photo it when I'm outta work...it does kick on earlier tho which was my goal..
More pics later
An thanks for all the info guys! An green loctite? Gotta look that one up
Oh yeah an Joe, couldn't tell ya what temp, just that its def before the halfway point on the oil? Coolant? Temp gauge...i can photo it when I'm outta work...it does kick on earlier tho which was my goal..
More pics later
05-16-2012, 07:52 AM
#8
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The gasket is squishing out because it does not have a proper set to fill. You could remove the o-ring try a copper washer like many vehicles are using on their oil pan drains or you could try the thread sealant. Keep in mind one thing if you use thread sealant, it's gonna be a sum bitch to remove.
05-16-2012, 08:16 AM
#9
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The gasket is squishing out because it does not have a proper set to fill. You could remove the o-ring try a copper washer like many vehicles are using on their oil pan drains or you could try the thread sealant. Keep in mind one thing if you use thread sealant, it's gonna be a sum bitch to remove.
05-16-2012, 09:46 AM
#10
Seasoned tech
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Thread sealants shouldn't make it hard to get loose. Just seal the threads. Thread lockers will make it hard to get loose.
From what I recall green Loctite is the super duper thead locker. Like it's supposed to lock smooth shafts together. So you might want to double check what you're getting. Maybe they make a thread sealer and a thread locker that are both green but both different substances and not so much interchangable.
From what I recall green Loctite is the super duper thead locker. Like it's supposed to lock smooth shafts together. So you might want to double check what you're getting. Maybe they make a thread sealer and a thread locker that are both green but both different substances and not so much interchangable.
05-16-2012, 10:58 AM
#12
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Use 680 and it WILL be a sum bitch to get apart according to Loctite:
LOCTITE® 680™ provides the following product characteristics:
Acrylic Chemical Type Methacrylate ester
Anaerobic Secondary Cure Activator
Retaining Strength High
LOCTITE
PRODUCT DESCRIPTION
LOCTITE® 680™ provides the following product characteristics:
Technology
Acrylic Chemical Type Methacrylate ester
Appearance (uncured) Green liquid
Fluorescence Positive under UV light
Components One component - requires no mixing
Viscosity Medium
Cure
Anaerobic Secondary Cure Activator
Application
Retaining Strength High
LOCTITE
® 680™ is designed for the bonding of cylindrical
fitting parts, particularly where low viscosity is required. The
product cures when confined in the absence of air between
close fitting metal surfaces and prevents loosening and
close fitting metal surfaces and prevents loosening and
leakage from shock and vibration.
What you should be using is Loctite 5770 which is a thread sealer with a high temperature rating.
Last edited by RWhisen; 05-16-2012 at 11:02 AM.
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