adipose

I just put a 47K SC430 unit in my 210K 2001 GS300. So far, working great. About 1900 cheaper than buying a new one.

GS4302001

This is a great thread - thanks for sharing!

I replaced the master cylinder/power booster assembly in my 2001 GS430 (220,000 miles) with one from a 2003 GS430 that I bought off of eBay for <$300. Mine worked well, before I replaced it, except for when starting out on cold (<20F) days. On those days, the dash lights and audible alarm would come on and not go off until the entire car had warmed up. The one from eBay works but, when I was bleeding the brakes, after replacing the master cylinder/booster pump assembly, I noticed there was a difference between the front and rear in that when bleeding the rear brakes with the key ON the booster pump would push fluid out the bleeder whereas when bleeding the front it didn't make a difference whether the key was ON or OFF. Is this normal?

I started out getting fluid to the nearest wheel (i.e. front drivers side) but once I had fluid pumping through the unit, I went back to starting at the right rear (furthest from the master cylinder) and worked my way back (RR, LR, RF and finally Left Front) to bleed the air out of the system. I definitely got all of the air out, I just am curious whether the booster pump should effect the front the same as the rear when bleeding the brakes. I have driven for two days with no issue (although its not very cold yet - so, I am not certain I am in the clear, yet).

captainva

iTrader: (1)

Yes that is normal. On our cars the ABS pump will bleed the rears for you so you don't have to pump the pedal or anything. The fronts need to be done manually by pumping the pedal.

GS4302001

OK - thanks. Nice to know it's acting normal.

It's been over a month and it has been in the single digits - so far, so good, with the "new" master cylinder assembly.

LexusK

iTrader: (14)

Bumping an old thread.

So I know the SC430 is a direct swap, but I believe I heard that there were other cars would be direct swaps as well. Can anyone confirm? I think I heard the Avalon and possibly one of the Toyota SUVs? I can't remember which one, but hopefully someone can chime in and confirm.

Thanks,

captainva

iTrader: (1)

Avalon will swap in but you'll lose ABS, TSC, and VSC because its a different type of master cylinder and its more work because its not a direct swap