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[GMCnet] Reviving the Cad 500 [message #162802] Mon, 12 March 2012 21:11 Go to previous message
Ken Henderson is currently offline  Ken Henderson   United States
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma:
Senior Member
Well, I flunked crank-'er-up today. I'd sort of thought I'd get the
plumbing and wiring finished today in time to start the engine.
Didn't happen. As usual, things took a lot longer than I'd expected,
and I took off on tangents.

For example, It probably took me 1-1/2 hours to reconnect the
transmission cooler lines to the transmission. When I installed the
Cad, I re-routed those lines to the right side. They came out with
the drive train, but were a slight problem, so I didn't remount them
before installing the engine. Big mistake. Just couldn't get them
aligned for a long time.

Then, I decided to try to cure the relatively minor exhaust pipe leaks
at the manifold connections:

Gary Kosier sent me new "bell mouths" to replace my poor locally
produced ones. A couple of days ago I was discussing that plan with
my young car nut plumber. He suggest that I machine the manifolds to
accept the commonly available flanged "donuts", of which I have a bag
full. Since the manifolds are still on the engine with good Remflex
gaskets, I don't want to remove them. But, the right side has an
adapter from the flat manifold to the bell mouth fitting for the
exhaust pipe -- it was originally a heat riser valve. So, what I did
was machine the bell mouth side of that small adapter to accept a
donut. With that done, I think I achieved a good, spring loaded,
connection.

On the left side, I found that the exhaust pipe's bell mouth is
really pretty good -- but the studs on the manifold have integral
nuts, which did not allow the clamp to seat firmly around the bell
mouth -- I missed that when I originally installed the engine. After
replacing those studs with some made from 3/8-16 all-thread, I seem to
have a good connection there.

MAYBE, I'll avoid having to cut & weld Gary's new ends on the
exhaust pipes.

Then, since I'd lost a lot of ATF from the torque converter and the
chain cover while correcting the pump bushing problem, I decided to
remove the pan and try to stop the seeping from its cork gasket.
After draining the ATF down to the temperature sender bung, I removed
the last two bolts. But I didn't have my hand in the right position
when the gasket finally let go -- it toppled off of my hand and dumped
2-3 quarts of ATF on the floor, via my left arm. :-( There went one
more big bag of OilDry. And came another big splotch on my
not-that-old concrete floor. Wherefore art thou, oh long-delayed
floor epoxy?

Tomorrow SHOULD see the top-side wiring and plumbing completed and the
engine started. Y'all keep your fingers crossed for me!

Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI+ & EBL
www.gmcwipersetc.com
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
 
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