Test.

[~JM~]

Info for e-mail.

Cadillac T'stats & coolant flow.
http://caddy500.com/index.php?topic=697.0

Cadillac starter braces.
http://caddy500.com/index.php?topic=714.0

Pics of CSOB custom timing marker for 1975 Eldorado 500 engine with the heavy 14+# cast lower pulley.

Pics of heavy cast lower pulley & original (broken) plastic timing marker.

[~JM~]

Cadillac sensor locations.

[mt83]

The efe port you are talking about is on early model blocks that typically have small oil galleys also.

[MTS Marty]

EFE PORT???
There is a heater fitting there on the 68 - 70 blocks. It is a 3/8" pipe thread into the block
Fitting went to rear of pass head after

[ST Dog]

Marty, I think it was used for controlling the EFE valve on the later engines.
At least it was some sort of thermal vacuum switch on the 425.

But yeah, on the early engines it was the heater outlet. Guess they decided to use the same location later when the added EFE, and start drilling the hole again.

[~JM~]

Hey guys,

I appreciate the additional info, but I had originally planned to delete this post in a week or two. It's just here so I can e-mail the link to somebody.

Thanks
~JM~

[ST Dog]

So add the info to some more permanent post.