Exhaust valve high temp grease

[Ryandoc]

Folks,

I want to apply some some of lubricant to my exhaust valve mechanisms, there's no doubt the tmeperature on those metail parts is in the hundreds of degrees.

Ive researched this as much as I can and not a lot comes up, silicon sprays a no go, litium grease mentioned but worries about it drying out and leaving a solid residue. WD40, short term solution, concerns about flamability?

Im not an expert on the mechanism but there looks to be some sort of plastic sleeve bearing devices that the arm slides thorugh to actuate the butterfly valve. Something spray on is probably easiest.

I did look at ultra high temperature industrial greases as well, sound extreme but whats the point putting something on that either wont work, will dry out straight away or will even block up the moving parts.

Anyone any thoughts on this.

cheers

 

[2b1ask1]

A good HM grease should be fine most operate up to 200 c I'd be surprised if external temps were anything like that on these valves; reaches for his Lidl infra-red thermometer...

Nothing is going to stay put internally.

 

[safrane]

Krytox XHT?

 

[StuartW]

I used lithium spray on grease on my old, OEM boxes and the valves worked fine but then they were working ok before. It does leave a bit of a mess with the amount I applied but it's out sight. I must do the same with the Larinis to safeguard any future issues

 

[Ryandoc]

I wouldn't be surprised if the exhaust metalwork itself is up at 300-400 degrees. The mechanism should be a little cooler though.

Can't find much online other thank people using wd40, some bike forum recommended some stuff can't remember what it was though

 

[Zep]

Have you considered dry graphite? It would lubricate but doesn't dry out...

 

[Ryandoc]

I saw something about graphite powder mixed with a little alcohol. The booze burns off and leaves the graphite.

Have spoken to someone yesterday in the know and they have said a squirt of WD40 when cold to lube things is fine and then good old copper grease is fine, think sometimes you miss what's in front of you, copper grease is good up to 1500 degrees.

I'm going to try and get to them this afternoon

 

[StuartW]

It's like everything else, the more often it is used the less likely it will fail so best you use the sport button as often as possible - if only to stop it seizing up

 

[CatmanV2]

Doctor's orders

C

 

[Ryandoc]

I think one of mine might be sticking but I'm not sure, but going to do a bit of maintenance anyway. She did 600 miles last week so she gets used plenty !

 

[StuartW]

She did 600 miles last week so she gets used plenty !

Good to hear!

 

[Ryandoc]

Around 10k miles a year for me, always had been for my good 'weekend' car and then around 25k in my work mule. Lots of long journeys in both. It's true what they say motors benefit from long drives it's blows the cobwebs off

 

[alfatwo]

I saw something about graphite powder mixed with a little alcohol. The booze burns off and leaves the graphite.

Have spoken to someone yesterday in the know and they have said a squirt of WD40 when cold to lube things is fine and then good old copper grease is fine, think sometimes you miss what's in front of you, copper grease is good up to 1500 degrees.

I'm going to try and get to them this afternoon

No grease who ever makes it wont survive on exhaust systems, its just too hot!

Dave

 

[adam01]

No grease who ever makes it wont survive on exhaust systems, its just too hot!

Dave

maybe this

https://www.superior-industries.com/dsf_5000_product_122.html

 

[Ryandoc]

Agreed it won't survive but I wouldn't expect it to, lubricating is a maintenance item so would expect to have to re-apply periodically.

Will try the WD40 to give an initial free up then a small application of copper grease, once my hangover has buffered off !