JHZR2
Staff member
This is for my auction win 1991 350SD.
It was like this:
Car otherwise runs and drives beautifully. The brake calipers were seized tight, not doing anything. Fronts work perfect.
This is what happened:
So now I’m ready to put it back together. Maybe this evening after work or something. But I want to use the right lubes. FSM doesn’t say much.
Don’t want to overthink it, but you can see that the pads ride on some little (exposed) pins, and it may make sense to put something on the backs of the pads (which have permanent shims).
I have plenty of products. Copper and silver antiseize, silicone greases, moly paste, m-77, Toyota rubber grease.
I have to wonder if for new calipers, it would be worthwhile to apply Toyota rubber grease lightly to the exposed piston boot? This would just be a one time thing to help it stay soft and supple. Maybe very lightly apply some silicone or m-77 on the pins that the pads ride on? (Item 41 in the caliper pic above) Maybe some anti seize in the holes that the pins fit into? (The holes that the pins and #42 above go through). And something (silicone? M-77?) on the pad backs where they touch the piston?
Again, don’t want to overthink, but I have new calipers and oe pads, and want to lube it right. Seems like there are so many options, and while usually the slide pins in rubber boots get silicone, these are fixed calipers with a pin that the brake pads ride on… that’s totally exposed.
So what would you do/use?
It was like this:
Car otherwise runs and drives beautifully. The brake calipers were seized tight, not doing anything. Fronts work perfect.
This is what happened:
So now I’m ready to put it back together. Maybe this evening after work or something. But I want to use the right lubes. FSM doesn’t say much.
Don’t want to overthink it, but you can see that the pads ride on some little (exposed) pins, and it may make sense to put something on the backs of the pads (which have permanent shims).
I have plenty of products. Copper and silver antiseize, silicone greases, moly paste, m-77, Toyota rubber grease.
I have to wonder if for new calipers, it would be worthwhile to apply Toyota rubber grease lightly to the exposed piston boot? This would just be a one time thing to help it stay soft and supple. Maybe very lightly apply some silicone or m-77 on the pins that the pads ride on? (Item 41 in the caliper pic above) Maybe some anti seize in the holes that the pins fit into? (The holes that the pins and #42 above go through). And something (silicone? M-77?) on the pad backs where they touch the piston?
Again, don’t want to overthink, but I have new calipers and oe pads, and want to lube it right. Seems like there are so many options, and while usually the slide pins in rubber boots get silicone, these are fixed calipers with a pin that the brake pads ride on… that’s totally exposed.
So what would you do/use?
Last edited: