FJ/BJ clutch master the same?

[amaurer]

Clutch master cylinder is leaking. NAPA only lists the parts for the FJ40, I have a BJ42 (1982). I can't imagine why they'd be different, what do you say?

Also, NAPA lists versions with and without "brake booster" - I'm guessing they mean clutch booster which I think the 60 series had...?

Anyway, heres the "w/o" booster version:
NAPAONLINE®

And "w/"
NAPAONLINE®

So will this work for me?

[lostmarbles]

Originally Posted by amaurer

Clutch master cylinder is leaking. NAPA only lists the parts for the FJ40, I have a BJ42 (1982). I can't imagine why they'd be different, what do you say?

Also, NAPA lists versions with and without "brake booster" - I'm guessing they mean clutch booster which I think the 60 series had...?

Anyway, heres the "w/o" booster version:
NAPAONLINE®

And "w/"
NAPAONLINE®

So will this work for me?

The Toyota EPC lists clutch master 31410-60050 (SUBS 31410-60051) for BJ4# HJ47 and FJ4# from Aug 80 to April 86.

So I think the "without booster" napa master should be "the go" Drew.

[amaurer]

Anyone know the proper bore size for a BJ42? All I'm finding is 3/4" replacements....

[lostmarbles]

My BJ40 has 3/4" bore master and 7/8" bore slave.

I can't find the bore sizes listed on the EPC for a BJ42.

Perhaps another BJ42 owner can read the bore size off their master. (It should of course be in raised letters on the side of the casting.)

[amaurer]

Awesome, thanks. SOR listed non-USA BJ42 masters as "different", but I can't seem evidence that this is the case.

[Roberto]

I beleive mine looks diff and is from AUS? mine is a single resevoir but has some funky lines, will take pics if need be? here is pics of mine RHD.

R

[amaurer]

Mine looks the same, also RHD. Can someone throw up a pic of a US or LHD cylinder?

[lostmarbles]

By the way - My BJ40 clutch mastercylinder uses a different 3- bolt mount (compared to your BJ42s):

[amaurer]

Great posts, thanks for the help.

I have a new question about my leak; I'm not sure its actually a leak. This morning I got in the truck and stepped on the clutch and heard a funny noise but didn't think anything of it. Then, at lunch, I noticed some fluid on the driver's floor and found the clutch (brake) fluid (lost some paint to it too, damn).

I cleaned it up and watched for leaks the rest of the day; none. When I got home I took off the outer boot (there was some very old (black) fluid in it) and pumped it; no leaks. I think the master is not "leaking" but rather had slowly seeped and filled the outer boot over the years. The noise I heard this morning was the boot somehow catching on the rod and squishing the collected fluid out.

So the question; if don't replace the master at this time and continue to drive it, generally do these things catastrophicly fail, or do they die slowly? I don't want to get stranded somewhere so if its at the start of a slow death and I can safely squeeze a few months out of it, I might like to do so...?

[lostmarbles]

I reckon it has already given you the "gentle warning".

Next is the "catstrophic failure out on the trail in the middle of nowhere".

I'd say replace both master and slave (unless the slave has been replaced recently or looks in good nick) - and probably replace that flexible line at the same time.

Then you'll know you can rely on your clutch hydraulics.

[pbgbottle]

my 78 BJ40 looks exactly like Tom's , (lostmarbles) 3 bolt LHD just not as pretty

[amaurer]

New master cylinder just arrived; I ordered the Wagner brand from rockauto.com ($35). The amazing thing is that the part in the Wagner box says AISIN...