Paul:
I have purchased the RX8 water pump block from Jeff D. (pic attached)
but cannot find the exact radiator cap bung (o-ring sealed) that will
fit it.
Do you know exact supplier or part #?
Thanks and regards,
cozyflyr
I can't find it either. I looked recently. Apparently the company
went out of biz.
Did you check speedwaymotors.com ?
They have a small weld on that my ace tig welder could weld but there
would be a charge.
They have a bolt on that might fit if turned down.
If you find a larger one I will turn it down on my lathe no charge.
Randy, we need to redesign this part.
Paul Lamar
Question The photo here with this pump is specially made for
improving cooling efficiency? If so who is making it? I'm
Interested.
For the cap bung, it might be a metric one, that maybe the reason you
don't find it. If you can give to me some measurements, then, I can
look for it as in Europe metric is common....
Pascal
I believe the pressure caps are standardized through out the world.
I think Randy in Colorado will be making those in the future. It is an
adapter to the RX8
water pump that is designed to clear the p-port slide throttle. Here are
some more
pictures and 3D's. The radiator works best on the cool side of the
engine so this gets
the coolant going in the right direction. The muffler shown in these
3D's is obsolete
as we have come up with a much better solution.
Here is Neal Ungars experience with the install.
Quote.
To those as stupid as myself,
I have the renesis
motor with Jeff
Doddridge’s water block to replace the original manifold. It fitted
beautifully
but once I filled the coolant I noticed a slight leak at the bottom.
Cursing myself
for having not fitted it properly I removed it (along with the slide
throttle and
pipes, an hours work) to find what seemed not enough clearance between
the block and
a washer. I cleaned everything up, filed more clearance between the
block and the
surrounds, refitted the water manifold, and no leak, Eureka!! A few
days later I
noticed a slight water leak down the front of the motor, and next day
the same water
leak at the bottom of the manifold once again. This was with no
pressure in the
system at all, so it could not go “as is”. Once again I removed
everything and again
could not see anything wrong, clearances were not the problem. I now
suspected the
welds on the manifold block. Much filing and probing with a needle
revealed no
possible hole in the weld. Then it finally dawned, I am totally stupid!!
When I had put the manifold on both times, I had been very
economical with the
gasket putty so as to not have too much squeezed out into the water
channels.
Therefore I simply applied the gasket goo to the surrounds of the
manifold holes.
Lovely job I did too. What I forgot however was that Jeff Has put 2
internal
mounting bolts to hold the manifold onto the engine block, again nicely
done. In my
effort to minimise the gasket goo, I omitted to surround both bolt holes
with gasket
maker. That allowed the coolant to seep down the bolt holes and out. It was
impossible to pick up the source of the leak being so slow. Well I
fixed it!
There is probably so much RTV on the join now that I have probably
blocked both
manifold holes! Actually all I did was to put a smear around the head
of both
internal cap screws so that the coolant is prevented from passing the
head of the
screw. Why did I not pick that in the first place?? Hopefully it will
prevent
someone else from getting into a temper.
Neil. Unger
end quote.
Paul Lamar
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