Hello all.  1985 EA82 4WD Wagon.  My RR wheel cylinder is leaking.  I had ordered a rebuild kit from RockAuto a year ago... and just opened it yesterday... only to find out that the rebuild kit seems to be for a 3/4" bore wheel cylinder.    The one on my vehicle seems to be 5/8".   

  Can anyone tell me what size wheel cylinders they have?   RockAuto shows 5/8", 11/16" and 3/4" ... even for a 1990 Loyale.   It could be possible that a previous owner put in a 5/8" on my rig?

  Any info from previous experience would be greatly appreciated.   Thanks in advance.

Why not just purchase a new pair of wheel cylinders? They're about $11/ea at places like Autozone, Advance, etc. and then you would not only have good new components (not having to waddle through possibly getting more of the incorrect rebuild parts) but you would know for certain what you have installed on your car.

Why not whole new cylinder?  They are so cheap.

 

My FSM's only list 11/16 for 2wd sedans and 3/4 for 4wd.  All of them

 

So from the 85 FSM your 4wd wagon should be 3/4......this is all new to me.....I always though they were all the same for a given brake type.....which I guess they are....2wds are manual adjust........4wds are self adjust........

 

5/8ths though???  Someone put EA81 2wds on there???

Thank you GLoyale.  That is exactly what I needed to know.  Mystery solved for my EA82 4wd wagon.  

So the EA81 4wd will have 3/4" bore also???   I'll get some ordered today.

The brake shoes are soaked in brake fluid... Any chance of saving those... or should I go with new?

I'd go new on the shoes too.

I'd verify the wheel cylinder on the other side, if not straight out replace it at the same time. Smaller bore = less pressure applied to the shoe = less stopping power... After all the surface area of the piston is the force multiplier