355 Hill Engineering Triple Seals, any instructions?

Hot soapy water and seran wrap

They never sealed right for me, always pee'd a little when cold

 

Yea I slipped them over a socket to slightly stretch them and kept them on there overnight. But yea, took FOREVER to shrink back down. I actually broke one trying to slide the shaft back in. Literally just did this a few weeks ago. Good luck!

 

Yea I hear the viton ones are the way to go… why are you needing to go through them so often?

 

haha, “flexible and easier to fit”. I have no other experience than trying to install these ones, but it was not flexible nor easy.

 

This is how I installed the "flexible" triple seals: Triple Seals and Pumpkin Installation - Another Way | FerrariChat. The only hard (and hot) part was boiling and stretching the seals.

 

With factory seals never even heard of boiling them. I use nothing but my fingers to get them in place. The factory tools were a joke. For one thing I do not want them stretched any more than absolutely required. Factory tools stretched them way too far.

Cannot comment on Hill seals. Never used them.

 

Well I would counter that if factory seals present such a challenge maybe Hills seals are just not the issue you suggest.

Start to finish I install factory seals in 10 minutes, maybe less. You simply would not survive in a dealer service department in 1999 taking longer to do a quality job. I worked around a lot of guys doing similar so I am not alone. I suspect given different perspective of the problem Hill seal installation is not insurmountable.

 

IIRC I used a thin peice of lexan with the seals around it (curled), then slid that over the shaft until the seal was near it's groove, then held the seal there and pulled the lexan out. Repeat x3. I don't remember it being very difficult but it was ~13 years ago.

Sorry, this was the originals but I'd try the same with these.

 

Mitchel

I have never used the viton seal just the OE. Does the viton leak less? The ferrari design is very poor. I just persuade the seal over the input shaft. When I get to the lands I use a pick placing pressure on the ring and guide the seal over each land with tip of pick acting like a shoe horn. The seals will still be loose over the shaft but the clutch shaft has a chamfer larger than the ID of the clutch shaft. This allows for placing uniform pressure to squeeze back the seals and run them into the clutch shaft with out distorting them out of the input shaft lands. If the seal is stretched out too much you can hose clamp to get the seal about the diameter of the chamfer and tap it home with a delrin faced mallet. It's a dumb design!

 

When I did mine, I used the Ferrari OEMs. They weren't easy, but like Rifledriver said it only took me about 10-15 min to do all 3.

The way I shrunk them down once they were in place was I cut out a piece of a plastic flexible school binder, then wrapped it around the 3 seals and used hose clamps. Left it like that overnight and it worked perfectly fine. I actually used this piece of binder to slide the seals over the shaft and into place.

Here is where I slid them on (no boiling, no soap, just muscled them on)

https://www.ferrarichat.com/forum/posts/139935683/

Here is how I shrunk them down

https://www.ferrarichat.com/forum/posts/139935707/

 

@yelcab did you get the seals to "shrink" into place so the ID of the seal actually seals? I have avoided this job for the last year and it's finally time to do it.

 

10-15 start to finish.

 

A lot of guys were using some shim stock and a hose clamp. After a few times of that I just with fingers stretch over shaft much like walking a tire bead on a wheel, push them down in place with fingers then with one hand push gently on end of shaft and with a plastic tool gently run around circumference of seal working it into place. Once they all pop in slide shaft back out, make sure none are distorted, push shaft back in and install clutch. That plastic tool for pushing on edge of seal is only tool used in entire operation. Like I said, 10-15 minutes from unpacking seals to installation of clutch. No need to make it a project.

 

Hours? They shrink to size under pressure in about a second and a half. Put hose clamp and shim stock on, tighten then remove.

Its not a matter of time. They assume any shape you force them into.

 

The install was 10-15 min. Shrinking them down wasn’t part of the install, that was after. I am not experienced so didn’t know it only takes a few minutes to shrink once formed by your fingers as Rifledriver stated. Now I know for next time

 

I don't think the ID of the seal touches the bottom of the shaft groove. The seals appear to seal against the sides of the shaft grooves.

 

Correct. ID is not a sealing surface.