O ring lubricant
- Thread starter Jay3702
- Start date
I smear a small drop of liquid dish soap (Dawn) on cooling system o-rings.
1998 Lexus LS400 FSM
1998 Lexus LS400 FSM
Why worry. Go with silicone grease like Sil-guide.
Whether it's rubber or neoprene it will be fine with a silicone grease.
Whether it's rubber or neoprene it will be fine with a silicone grease.
Super Lube has excellent grease and material compatibility charts if you're ever in doubt:
https://www.super-lube.com/Content/...ty Chart for both Polymers and Elastomers.pdf
https://www.super-lube.com/compatibility-charts
The gist of it is pure silicone is compatible with everything except siliconized rubber.
https://www.super-lube.com/Content/...ty Chart for both Polymers and Elastomers.pdf
https://www.super-lube.com/compatibility-charts
The gist of it is pure silicone is compatible with everything except siliconized rubber.
Not only is it a very general statement, it is also wrong. It’s a safe bet that these o-rings are NBR. The most commonly used elastomer in automotive applications is NBR because it is so versatile and dependable. NBR is compatible with, that is resistant to, mineral oil and mineral oil-based greases, PAO and PAO-based greases, silicone fluids and silicone -fluid based greases and pastes, most vegetable oils and ethylene glycol. I don’t think brake systems use NBR. I know this because (1) I've run elastomer compatibility tests many times and (2) chemical compatibility tables say so.
Interesting take you have I guess. The system fluid touches the o-ring so I don’t believe it will harm the o-ring.
I’ve worked in manufacturing of heavy equipment for 25 years. We have used system oil and other things like Parker o-ring lube during assembly. I do the same at home on my stuff including oil filter gaskets. I have had an issue yet.
I don’t recommend petroleum jelly or Vaseline. They tend to squeeze o-rings out of groves.
Just my $0.02
I remember when the transmission cooler started leaking into the radiator of a car I had and the hoses felt soft after just a few days. The repair manual even said to replace all hoses. Is the oring mentioned resistant to oil? Who knows? But you do know it's resistant to coolant, so why lube it with anything else?
twouvakind
Site Donor 2025
P-80 Emulsion
P-80® Emulsion Temporary Rubber Lubricant is a biodegradable assembly aide that eases installation of tight-fitting rubber and plastic parts by reducing the force needed for insertion. Typical applications include installation of seals, o-rings, bushing, grommets, and grips. Use P-80 Emulsion for manual and automated applications. Only a thin film is needed for most applications. 10ml plastic tube with resealable cap.
P-80® Emulsion Temporary Rubber Lubricant is a biodegradable assembly aide that eases installation of tight-fitting rubber and plastic parts by reducing the force needed for insertion. Typical applications include installation of seals, o-rings, bushing, grommets, and grips. Use P-80 Emulsion for manual and automated applications. Only a thin film is needed for most applications. 10ml plastic tube with resealable cap.
depends on whata material its made from
- Joined
- Nov 23, 2021
- Messages
- 467
That does not happen with newer vehicle.
I buy my silicone grease at O'Reilly . It's up by the register .
Do you want a sheen of oil on top of the coolant in your radiator? That could be misdiagnosed as any number of gnarly problems.
"System fluid" is usually a great lube for o-rings, so antifreeze would have worked well. For gasoline system ones motor oil is fine as gas is "dry."
"System fluid" is usually a great lube for o-rings, so antifreeze would have worked well. For gasoline system ones motor oil is fine as gas is "dry."
I have some O-ring lube by Superlube.
https://www.amazon.com/dp/B07C3CZ9CL?ref=ppx_yo2ov_dt_b_product_details&th=1
https://www.amazon.com/dp/B07C3CZ9CL?ref=ppx_yo2ov_dt_b_product_details&th=1
What color are the o-rings? If black, then I'd use a tiny bit of dielectric (silicone) grease. If colored and you don't know the material, then straight antifreeze which would also work on the black.
