Sent: Tuesday, December 23, 2003 9:02
PM
Subject: [FlyRotary] A little more help,
please
Hi....it's the pest again....Paul Conner.
My 13b was going to be mounted plugs up by the original owner, so he had this
radiator cap with all it's plumbing inserted into the hole in the picture,
near the oil filter. When I attempted to unscrew it, it came out easily,
and I found that it was not threaded, but instead it was just pushed in the
hole. Probably wouldn't have stayed there very long. Any idea what this
hole is/was for? (obviously water, but to where might it have gone.....heater
core)? Lastly, to plug this hole, should I attempt to tap it with
a NPT tap, or is there something that is a press fit that I should purchase to
plug this hole? Thanks again for everyone's patience. I'm
hoping to get this thing running shortly, but need to address these pesky
little inconveniences. The first picture shows what was inserted into the
hole, and the second picture shows where the hole is located. Paul
Conner, endless 13b hole-plugging.
Paul, that hole is the heater hose outlet. It appears
that the previous owner intended to fill up his block from the
heater hole - which for a "Plugs Up" installation probably isn't a bad
idea. Filling the block from that hole with coolant would probably push
most of the air out of the block. I used the hole as it was intended to
plumb to my heat core inside the cabin for cabin heat. Some folk have
block that hole, but there are some schools of thought that indication that
doing so could interfer with the block coolant circulation - Just
something I've heard. But you will need to ensure that it is either
blocked or a hose from it routed back to your coolant system after the
thermostat housing.
Ed Anderson