Brake fluid leak slightly

I found some brake fluid leak from caliper while I swap my winter tires. It looks not so severe, but I just wonder someone has same issue.

 

have you put any aftermarket mods on the truck? Wheels/tires suspension?

 

is it actually wet or staining of some sort perhaps from the factory bleed process?

 

clean it off then re check in a month or so, if it reappears take it in for repair.

 

No. Nothing.

 

It looks dried off. As what dusman said, it might be from factory bleeding, I will try to clean off this and check. Its still under the warranty, I might bring to dealer to check.

 

Clean it off and check the fluid reservoir. Also with the wheel off, turn the truck on and pump the brakes as hard as you can with your hand multiple times. If there is a leak you'll see new fluid leaking.

 

That kinda looks like caliper bolt grease remains to me.

 

You got a lemon.

 

Fairly sure mine look the same and that it's normal.

 

^^^
Yup, factory bleed process and then didn't clean it up. Don't be surprised to see it on and around the engine areas too. If it was a real leak, it's gonna leave a trail all the way down to the bottom of each component it originated from along with the drips. The factory just didn't do a good job wiping up after themselves.

 

This is the first vehicle with fixed caliper for me, so I'm not sure whats the holes where the fluid leaked. Since the opposite side has a bleeding hole, I guess it might be any kind of seal the other side? or those are bolt holes to hold the two caliper pieces and leaked through there?

 

Might need some more detailed pics if possible. Usually caliper pins have some lube on it also, but not sure exactly which one on this truck ( from your image) since I haven't pulled my wheels off to examine the caliper unit.

Honestly, I'd clean it up with some brake parts cleaner and monitor it over a period of 500 miles. It very likely is the residual from Assembly. Sometimes during the bleeding process, the individual pulling the hose off the bleeder nipple may have just dripped a bit and didn't clean it off. If you don't have any soft or spongy pedal feel and no pulling, your brake system is likely still sealed. Does your taco exhibit anything like this when you use the brakes?

 

Based on some youtube videos, this type of caliper (fixed) does not have lubricated pins as different from floating type, and has 4 pistons, 2 each sides, and brake fluid flow through both sides of the caliper to push pistons. I don't have any picture other than this one.

I just found that the locations where fluid leaked from are the end of the four bolts (opposite side of the bolt head) which hold each side of the half caliper pieces together.
Possibly seal between the half pieces is not tight and fluid leaked through the bolt holes. I will clean them up and push the brake hard and check if there are any ongoing leaking.

https://www.youtube.com/watch?v=qoQlAW4DPnA

 

Yes, understand about these not having a floating caliper. I saw what possibly look like 2 sets of pins in your original pic, which appear to have the seepage leading to/from them. They usually get a bit of lube to keep them from seizing in the hole even though they don't move. This style usually require a small tap and hammer to get them out.
I should have called them pad retaining pins. I'm used to calling them caliper pins. I can see how it's confusing.

 

Those retaining pins are third circle from the top which has no stain on from the picture. The first and second are the bolts hold the half pieces together which I just figured