have any of you guys had your exhaust brake freeze either open or closed? been happening to me now its 0 and colder, kinda sketchy when it comes on driving then doesn't go off. Is there any lubrication I can spray on there? silicone maybe?

 

some of the online manuals say to lube the actuator .......... I am guessing some high temp grease may be in order

 

if it's more so a carbon build up problem, with exhaust brakes, you have to use them frequently to keep the carbon from building up around the butterfly and causing it to bind. sounds like temperature is mostly the issue in your case though. i'd suggest making sure you open it while it's running before you shut it down. that way the metal is hot and expanded which will allow movement of the butterfly. and on start-up, let the EGT's come up to a decent temperature before attempting to operate the brake.

 

i made a stretch tool to exercise brakes that have been sticking, you need to use them frequently and often, try to cycle them 6 times per drive cycle, the tool is a flat 1" bar with a notch, reach in or up, and repeatedly cycle during warmup, i used aerokroil to free them up, but the cycle time will maintain activity.

 

i use pacbrake silicone lube, but ive never had a problem with my jacobs, my dads pacbrake has seized 3 different times now.

 

Definatley use some kind of lube on the actuator. I prefer silicon based lubes up here cause they tend to ward off water from condensation better. Once you get some lube warm the beast up for a bit before applying it. Lubes hitting cold metal up here have a tendency to freeze instead of lubricate.