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How to adapt the VT Master Cylinder to early model Commodores

Started by RB30-POWER · 13 Apr 2008 · 339 replies

Preserved from CalaisTurbo (partial recovery). Original authors and dates are shown; archived members are not current Holdcom accounts.

michael9dArchived member
ahh sweet as man thanks for letting me know, do u know how much of the bolt u need to chop off in millimeters?
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VL_NickArchived member
I have just got advice from Ford that the AU reservoir is NLA. This is part ER 2B140A. The seals are still available though.
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GenieeArchived member
I have both a VS plastic booster, a VT booster + master cylinder and an AU fluid res. I was having a look at the differences between the VS and the VT... The VT is heaps bigger and heaps heavier... and yes, it doesnt have the spacer, so it would sit flush on a VT firewall im guessing... However, the VS one has a spacer bolted to it, (factory item) and it looks like it would fit on the VT one (with a few holes drilled). Im thinking that might be the way for me to go, and then just weld up + re-hole the pedal (as in the pics above from VL_Nick) Has anyone done this little switch a roo yet? So basically, instead of making up a spacer or buying one off someone, just pinch the back part of the VS booster?
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VL_NickArchived member
Quote: Originally Posted by VL_Nick [View Post] I have just got advice from Ford that the AU reservoir is NLA. This is part ER 2B140A. The seals are still available though. Can anyone who has easy access to a Ford spare parts department run this part number to confirm it is NLA? I would really like to get a new one than pull one from a wreck.
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SIrollerArchived member
@ Geniee, i wouldn't dissasemble a booster. just take the VS adaptor and molest it until it fits the VT booster (plus the 10mm spacer ) this is what I and a few others have done. @ VL Nick ford should be able to locate the P/N. otherwise you could contact PbR. on the other hand a good clean makes them look like new again so i don't see the need to go buy a new one at the silly prices they charge for NOS Some original photos have not been recovered yet.
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GenieeArchived member
Quote: Originally Posted by SIroller [View Post] @ Geniee, i wouldn't dissasemble a booster. just take the VS adaptor and molest it until it fits the VT booster (plus the 10mm spacer ) this is what I and a few others have done. Yea, i think the back part of the VS one just needs the holes adjusted a bit, (VT has 4 mounting bolts and VS only has 2 at that point.) Why would i need additional spacers? Without additional spacers, this would make it sit nicely on the firewall, the only prob would be the pedal length then wouldn't it? Or are these additional spacers to resolve that problem too rather than modding the hole at the end of the rod? Ill get some pics up when i do it, Also, my VT master, on the lower of the two ports that sit above each other, has a plug in it, and green paint over it, kinda like a sealant. Im wondering why that would be? unless the model it came off was an ABS one and they only have the Rear and Front lines hooked up, and the ABS unit controls the separation to the two front wheels? (The guy i bought my car off gave me the VT booster + master, so i have no idea what it was removed from.) Some original photos have not been recovered yet.
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PSI086Archived member
PBR don't sell the res seperately. I tried both them and the local holden and ford dealerships and had no luck
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VL_NickArchived member
Managed to find myself a brand new AU reservoir by sheer luck at a Ford wreckers. Took my VT reservoir out to make sure it will fit. Now to fit it up when I get home. No wreckers or private seller wanted to sell me the reservoir separately, only with master cylinder along with it. Understandable. ---------- Post added 12-02-15 at 09:34 ---------- Can confirm that the AU reservoir is a perfect fit. Everything lines up perfectly.
Photo 1 shared by VL_Nick
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Wkd_VlArchived member
cheers for clearing that up. ive tried 2 vs reservoir and there dont fit. ill get a au one this weekend
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CJWArchived member
Quote: Originally Posted by Wkd_Vl [View Post] cheers for clearing that up. ive tried 2 vs reservoir and there dont fit. ill get a au one this weekend Weird? I run a VS reservoir on mine, the only thing is the locking screw doesn't line up, I just re-drilled for a M5 bolt/nut. Obviously the Au one seems a better option though.
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SteveArchived member
Im using a Series III VS reservoir from a Stato and it bolts up fine, didnt even need to redrill for that bolt..
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Wkd_VlArchived member
yup au one fits up mint. so mucking around
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markovrArchived member
Found another way of making a vt booster adapter bracket from the one on a vs plastic booster..always knew about it but never considered it as I had the older way using a pre vs bracket fully worked out but nowdays its getting harder and harder to find the old brackets so I sused out the vs bracket and found that there was a little less cutting and welding work but still precision to get it to fit. You have to drill 4 x 5/16 holes 80mm across and 60mm down in the base to accept the studs of the vt booster.Mounting holes on original bracket are offset and not square with cylinder so you have to turn the vs bracket anti clockwise so mounting studs on new booster square up so when mounted up the master cylinder is square and top of reservoir is level. This will give you a small margin to file the holes a poofteenth to fit. 2 of the 4 holes end up being very close to the edge of the bracket so some filling out to get clearance for the nuts to clear is required ...you could just bolt it up and it would probably be ok but I reckon you need to weld a plate on the bottom for strength and to give it a professional look. I have seen on Ebay a complete setup and I this is how the bracket is done (- the plate) and he is quick to pat himself on the back but in his pictures of it he is careful not to show the bracket as its this easy. I have sold many setups on this site and on ebay from time to time and sell them at much less money but I dont hide anything and always give enough info that if you have enough confidience and think you can do it.... save yourself some money(lots) and do it yourself. You still have to weld up and redrill the pushrod hole in the booster you use but that isnt a major deal with some welding skills and patience. Some original photos have not been recovered yet.
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MxPx VLArchived member
Quote: Originally Posted by markovr [View Post] You still have to weld up and redrill the pushrod hole in the booster you use but that isnt a major deal with some welding skills and patience. What are the dimensions for re-drilling the pushrod with the extra plate welded on?
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markovrArchived member
Quote: Originally Posted by MxPx VL [View Post] What are the dimensions for re-drilling the pushrod with the extra plate welded on? bolt the modded bracket on the booster centralise shaft and measure up centre of shaft from boltup face of bracket up the rod and drill the new hole centre at 112.5 to 113 mm ...hole is one size bigger than 3/8. This will put pedal height in the same place as before. On another topic I also stock the BRAKE LINE ADAPTERS and can suppy as many as you need.
Photo 1 shared by markovr
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VL_NickArchived member
Has anyone come across this issue before. I am replacing the master cylinder which is from a VY commodore. I ordered a new master cylinder to suit VY commodore and when I went to bolt it on the rear of it is different to the one I took off. the rear is shallower than the one that came off. The master cylinder looks the same otherwise but the front of the one that I took off has VX stamped on it and the one going on has VY. I definitely removed the whole booster and master from a VY. Is it simply a matter of removing the screw from the booster to allow it to bolt up?
Photo 1 shared by VL_NickPhoto 2 shared by VL_NickPhoto 3 shared by VL_Nick
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VL_JOHNArchived member
Do this. It is from page one on this thread... Cut the head from the adjustable bolt you just removed and put a small slit into the end of it with a hack saw, so you can use a straight blade screwdriver to screw it back into the pushrod on the booster. Note: You must cut the head of the adjustable bolt short enough so it can become level with the pushrod on the booster. Step 3. Screw the bolt back into the pushrod and use locktite to lock the thread on it. Note: Make sure its 100% level with the pushrod itself. The only reason we screw the bolt back into the pushrod is to stop the hollow push rod from collapsing, it may fatigue over time from it being hollow. The bolt will strengthen it. So please don't just leave it out.
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VL_NickArchived member
Turns out I had the wrong master cylinder. The AWD VY Crewman, Adventra etc has a different master cylinder. Got the right one and it fitted up fine.
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damo`Archived member
does anyone know if it matters if the AU reservoir is from a Series 1 or 2? Went to a wrecker and he said there is a difference between the brake systems on S1 & S2, or is the reservoir just the same ?
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HqheathArchived member
Hoping I can do this to my vh with parts from a vu?
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