What is the Best O-ring lubricant for fuel rail pressure sensor install on 06 Towncar?

[TcLincoln2007]

Thanks for all your help on my other post about the fuel rail pressure sensor install. I think I can handle this job (it's only 3 screws, and I already practiced unhooking the connections! And watched 8 videos...).

I am just wondering what you recommend for the o-ring lube? I only found a few types available. Below are three I found. The first one (Dow Molykote) is cheapest, and I can get it quicker. Is it good? Should I get one of the others, or something else?

THANKS!

https://www.amazon.com/Corning-Molykote-Ring-Grease-Lubricant/dp/B01HEC1W3A/ref=sr_1_3?crid=2WPXX7CGE8H36&keywords=molykote+o-ring+grease&qid=1648416800&sprefix=molykote+o-ring+grease%2Caps%2C86&sr=8-3

https://www.amazon.com/Super-Lube-93003-Silicone-Translucent/dp/B07CFS31M8/ref=sr_1_4?crid=2NDYK72P561DX&keywords=o-ring+grease&qid=1648412153&sprefix=o-ring+grease%2Caps%2C120&sr=8-4

https://www.napaonline.com/en/p/NCB56204?cid=paidsearch_shopping_dcoe_google&campaign=GSC-Chemicals&campaign_id=6478876245&adgroup_id=115972171828&adtype=pla&gclid=CjwKCAjwloCSBhAeEiwA3hVo_c5d1677cIKMvok0AKTxblMFD3a4c20PoJ0N32hXuA2CX9d2dXbpDxoCh-IQAvD_BwE&gclsrc=aw.ds&

 

[oktowncar]

I always use just a little vaseline around the oring

 

[TcLincoln2007]

Thanks!

 

[wolf_walker]

Sil Glyde

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[bbf2530]

Thanks for all your help on my other post about the fuel rail pressure sensor install. I think I can handle this job (it's only 3 screws, and I already practiced unhooking the connections! And watched 8 videos...).

I am just wondering what you recommend for the o-ring lube? I only found a few types available. Below are three I found. The first one (Dow Molykote) is cheapest, and I can get it quicker. Is it good? Should I get one of the others, or something else?

THANKS!

https://www.amazon.com/Corning-Molykote-Ring-Grease-Lubricant/dp/B01HEC1W3A/ref=sr_1_3?crid=2WPXX7CGE8H36&keywords=molykote+o-ring+grease&qid=1648416800&sprefix=molykote+o-ring+grease%2Caps%2C86&sr=8-3

https://www.amazon.com/Super-Lube-93003-Silicone-Translucent/dp/B07CFS31M8/ref=sr_1_4?crid=2NDYK72P561DX&keywords=o-ring+grease&qid=1648412153&sprefix=o-ring+grease%2Caps%2C120&sr=8-4

https://www.napaonline.com/en/p/NCB56204?cid=paidsearch_shopping_dcoe_google&campaign=GSC-Chemicals&campaign_id=6478876245&adgroup_id=115972171828&adtype=pla&gclid=CjwKCAjwloCSBhAeEiwA3hVo_c5d1677cIKMvok0AKTxblMFD3a4c20PoJ0N32hXuA2CX9d2dXbpDxoCh-IQAvD_BwE&gclsrc=aw.ds&

Hi TcLincoln. The safest route would be to go to any big box auto store and purchase a tube of automotive silicone lubricant. Since they are auto stores, that is what they will be carrying in stock. Even Lowe's or Home Depot would stock good silicone lubricant gels.

You don't want to use petroleum based lubricants on real rubber o-rings, since it can degrade them. And although modern automotive o-rings are often not real rubber, it is better to be safe than sorry and not take the chance. So silicone lubricants are the safest option.

See here: what is the best lubricant for o-rings - Google Search

Let us know how you make out and good luck.

 

[07-TC-SL]

Typically for automotive O-rings you don't have to over-analyze which is the "best" lubricant. I've seen coolant recommended as a lubricant for coolant related repairs. I've seen engine oil recommended for fuel injector O-rings. I've seen trans fluid recommended as lubricant for others.

If you want one lubricant for all, silicone or vaseline is safe for everything, basically.

 

[TcLincoln2007]

Thanks everybody!

 

[bbf2530]

Typically for automotive O-rings you don't have to over-analyze which is the "best" lubricant. I've seen coolant recommended as a lubricant for coolant related repairs. I've seen engine oil recommended for fuel injector O-rings. I've seen trans fluid recommended as lubricant for others.

If you want one lubricant for all, silicone or vaseline is safe for everything, basically.

Hi 07. Just to avoid confusion and problems for others: Silicone gel lubricants are safe for all o-rings. Vaseline is not safe for real rubber o-rings.

That being said, real rubber o-rings are used less and less in modern vehicles. However, the safest method is to use silicone gel lubricant on all o-rings. Why take the chances, if there is any doubt what the o-ring is made of.

Good luck.

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[TcLincoln2007]

Thanks again. The one below is cheapest and mentions o-rings. (and the auto parts stores near me (Davie, FL) didn't have any special o-ring lube and didn't know about silicone lube!!!)

Do you think this one is good?:

https://www.amazon.com/Corning-Molykote-Ring-Grease-Lubricant/dp/B01HEC1W3A/ref=sr_1_3?crid=2WPXX7CGE8H36&keywords=molykote+o-ring+grease&qid=1648416800&sprefix=molykote+o-ring+grease%2Caps%2C86&sr=8-3

 

[bbf2530]

Thanks again. The one below is cheapest and mentions o-rings. (and the auto parts stores near me (Davie, FL) didn't have any special o-ring lube and didn't know about silicone lube!!!)

Do you think this one is good?:

https://www.amazon.com/Corning-Molykote-Ring-Grease-Lubricant/dp/B01HEC1W3A/ref=sr_1_3?crid=2WPXX7CGE8H36&keywords=molykote+o-ring+grease&qid=1648416800&sprefix=molykote+o-ring+grease%2Caps%2C86&sr=8-3

Hi Town Car. My advice: Just go to your local Lowe's or Home Depot or Ace Hardware etc. etc., and buy a tube of silicone gel lubricant. Virtually any will do. You don't need "special o-ring lube". This is not rocket surgery or brain science.

And find a new auto parts store, if they do not know what a silicone lubricant is...

Let us know how you make out and good luck.

 

[Norms1stTC]

I use dielectric grease on o-rings. Never had any problems, and its cheap too and you'll have a bunch left over for coil on plugs.

 

[oktowncar]

Hi TcLincoln. The safest route would be to go to any big box auto store and purchase a tube of automotive silicone lubricant. Since they are auto stores, that is what they will be carrying in stock. Even Lowe's or Home Depot would stock good silicone lubricant gels.

You don't want to use petroleum based lubricants on real rubber o-rings, since it can degrade them. And although modern automotive o-rings are often not real rubber, it is better to be safe than sorry and not take the chance. So silicone lubricants are the safest option.

See here: what is the best lubricant for o-rings - Google Search

Let us know how you make out and good luck.

The majority of today's automotive parts that contain orings are of a synthetic material.

Synthetic orings contain petroleum based monomers like isoprene or chloroprene.
Using a petroleum based product like vasoline will not harm those orings

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[bbf2530]

The majority of today's automotive parts that contain orings are of a synthetic material.

Synthetic orings contain petroleum based monomers like isoprene or chloroprene.
Using a petroleum based product like vasoline will not harm those orings

Hi oktowncar. If you fully re-read my previous posts, I clearly stated several times that most automakers do not use real rubber o-rings on their modern vehicles.

However, I also stated that to play it safe, why not use silicone gel lubricant, since it is safe for all o-rings (while vaseline is not).

Using silicone gel lubricant instead of vaseline makes complete sense, unless someone here can 100% guarantee that all o-rings in a 2006 Town Car are not rubber, since "the majority of today's automotive parts" is not all automotive parts.

Again, why take the chance over a few bucks for a tube of silicone gel lubricant. Certainly saves wasting the time of researching whether 2006 Town Car o-rings are synthetic or real rubber, since it could also logically be argued that a 2006 vehicle no longer qualifies as a modern/"today's" vehicle containing "today's automotive parts".
And that is not a shot at anyone's car, since my older MKZ is a 2007. And I would use silicone gel lubricants, not vaseline, for all the above reasons.

Hope that explains my previous posts better. Good luck.

 

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[TcLincoln2007]

A friend had some of that molykote silicone 55 for O-rings, that seemed to cover all the bases, so I just used a little of that. Seems fine. Thanks!

 

[bbf2530]

A friend had some of that molykote silicone 55 for O-rings, that seemed to cover all the bases, so I just used a little of that. Seems fine. Thanks!

Hi TcL. Sounds good.

On a related note, I would still recommend you pick up your own tube of silicone lubricant gel. You can use it to lubricate and protect your window and door seals, moonroof seals (if applicable) etc, etc. It will help them seal more efficiently and extend their life.

Just a very thin film spread onto the seals with your finger or a clean cotton cloth, then wipe off any excess.

Good luck.

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[TcLincoln2007]

Thanks! I'll get some.

 

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Know that silicone is not an engine control sensor friendly chemical. If the sealer or lube you are using says it is sensor safe, knock your socks off. If it does not, be prudent around the engine. Other areas of the vehicle it does not matter.

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