Brad, and list,
I've done my TR4 engine at least twice with a seal mandrel I had made
where I used to work. It is steel, 2.823" in diam. I used it to
reinstall the original scroll seal, which has never dragged and has no
wear. I also used it on a friend's TR4A engine, with no reported
problems. I'd say the leakge is less than I expected. I've never
understood all the furor about changing to lip type seals, at least on a
street engine.
I did a Volvo B-18 engine, which also has a scroll seal. I didn't have a
mandrel for it, so I set up a feeler gauge at half the difference in
diameters. It took a little fiddling, but it went together and didn't
leak.
I came up an inch short on the rear bearing block felt seal. I got out a
spare piece of felt and found a moth-eaten tunnel thru it. It was late
and I wanted to close up the bottom end, so I made a section of seal out
of a wine cork. Shaped it up with a razor blade, dunked it in the cement
and hammered it in. Six years later, it's still there.
Cheers,
Pete Fullam
63 TR4
Original block
Original seal
Original owner
Brad Eells wrote:
>
> OK Gang,
>
> Seems to be a lot of comment out there about the Factory original aluminum
> rear crankshaft oil seal and the dimensions of the tool used to center and
> place the seal. This tool is referred to on Page 1.117 of the TR4 Factory
> Workshop Manual.
>
> I would like to do a survey much like Jack Drews did several weeks ago for
> the modern seal conversion.
>
> So here goes, if you have replaced your seal with a factory type aluminum
> scroll seal:
>
> 1. Did you use a mandrel cut to factory specs - 2.822 inches to install
>the
> seal?
>
> 2. Did you purchase a tool from one of the big three, what is the
>material
> it's manufactured from and what is it's dimension? I have a Moss
>nylon tool
> at 2.823 inches.
>
> 3. Did you make or have made your own tool and what is it's dimension and
> material?
>
> 4. What was your experience installing the seal and what are the results
>-
> no leaks, some leakage, lots of leakage!!!
>
> 5. Is the leakage beyond what you would have expected, desired or had
> previous experience with?
>
> 6. How many TR 4 cyl engines have you rebuilt with this seal? Did you
>have
> consistent results?
>
> As a faithful reader and dubious contributor to both the 'big' Triumph list
> and FOT for almost one year, I am surprised this issue has not come up in
> the past. I've owned one of my cars for 20 years (this March 10th) and
> hadn't heard this issue in all that time either. Of course, this is the
> first time I have rebuilt an engine from scratch.
>
> Thanks to Hardy Prentice for forwarding his experience and use of a seal
> tool with a dimension of 2.818 inches.
>
> Keep those cards and letters coming, I will tally the results in a week or
> so...
>
> Happy Turkey Day everyone!
>
> Brad
> 62 TR4 - Engine in bits
> 65 TR4A - Oil seal reinstallation awaiting results of this survey!
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