View Full Version : Hydrovac Mating Surfaces What do you think?

07-04-2007, 04:43 PM
After re-looking at the bottom mating surface on the newest hydrovac and JP's observation of some his cores being rejected. I want your opinion as to whether I should install this newest hydrovac.

Here is a picture of a really good mating surface http://i122.photobucket.com/albums/o278/studebaker-r2-4-me/IMGP0043.jpg

Here is a picture of the leaking hydrovac. You should notice the blurring of the ridges at 1:00 and 7:00 o'clock of the picture http://i122.photobucket.com/albums/o278/studebaker-r2-4-me/IMGP0034.jpg

This is a picture of the newest hydrovac which is suspect also.





I really don't like this newest hydrovac and think I may have problems getting it sealed.

1964 GT Hawk soon to be R2 Clone

07-04-2007, 05:14 PM
They don't look that bad. Make sure you are using soft, new, never used soft copper washers and crank them down real tight.

64 Daytona HT/R2 clone
63 GT R2
63 Lark 2 door
62 Gt Hawk
62 Lark 2 door
60 Lark HT-60Hawk
59 3E truck
58 Starlight
52 & 53 Starliner
51 Commander

07-04-2007, 05:51 PM
Thanks John, The pictures look better than in reality. The ridges are quite flattened at 8:00 oclock. I'll be painting my inner fender first then I'll give her a go with the two different sized copper washers I bought from SI as well!

1964 GT Hawk soon to be R2 Clone

07-04-2007, 05:53 PM
quote:Originally posted by JDP

They don't look that bad. Make sure you are using soft, new, never used soft copper washers and crank them down real tight.

It's hard to say from the photos, but they look as good or better than the one I got. I reiterate the above.

Tim K.
'64 R2 GT Hawk

07-04-2007, 07:37 PM
It seems that it would be possible to mount the part in a lathe and
remove and then re-form the grooves. No??


'63 Avanti, zinc plated drilled & slotted 03 Mustang Cobra 13" front disc/98 GT rear brakes, 03 Cobra 17" wheels, GM alt, 97 Z28 leather seats, soon: 97 Z28 T-56 6-spd, Ported heads w/SST full flow valves, 'R3' 276 cam, Edelbrock AFB Carb, GM HEI distributor, 8.8mm plug wires

07-05-2007, 01:17 AM
Tom, I expect those face grooves were made by some sort of piloted end mill. I wonder if a suitable mill could be made from a high-speed steel router bit? Cast iron is pretty easy to machine.

Gord Richmond, within Weasel range of the Alberta Badlands