John,
Did you ever verify the temperature at which the thermostat is opening and
if it is opening all the way? I would definitely pull the thermostat and
place it in a pot of water on the stove with a candy thermometer in the
water. This will verify correct operation of the thermostat. I have gotten
into the habit of always checking a new thermostat like this before
installing it. Why might you ask? Because of many waster hours of
troubleshooting to arrive at the "I bought a piece-of-s###" thermostat
conclusion. Also I have heard of temperature sticks which you can lay on
the engine in different places to verify how the engine is heating up, and
weather you have any hot spots. I believe they are a type of wax with rated
melting points. Does anyone know where you can get these?
-Rich
1959 Chevrolet Apache ____ 3100
__________/___/\_____
Rich Kinas |::::::::::::::> | | ----- )
Orlando, FL "-------( 0 )---------------( 0 )-"
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From: JAL12147@aol.com[SMTP:JAL12147@aol.com]
Reply To: JAL12147@aol.com
Sent: Sunday, September 19, 1999 9:54 AM
To: Advdesign1@aol.com; oletrucks@autox.team.net
Subject: Re: [oletrucks] 261 Overheating Problem
In a message dated 9/19/99 7:21:55 AM Eastern Daylight Time, Advdesign1
writes:
<< How about if you turn on your heater full. will that drop the engine
temp a few degrees? If so your radiator doesn't have enough capacity. But
you said the rad was new from one of the major suppliers. Is the engine
running too lean? >>
It doesn't matter if the heater is on or not. The temp is over 200? in
about
15 minutes. I have a 1980 250 ci HEI distributor from, I believe H. P.
Autotech, it's been a while since I purchased it. The tag says it's 0? @
1100 centrifugal and 0? @ 4" Hg, set initial @ 10?. To set the timing I
lined up the ball on the flywheel with the pointer on the bell housing. Is
this correct? I'm also running the 6 volt starter with 12 volt electrics,
it
cranks once and fires up. The Split Fire plugs are black and a little
sooty,
which would be on the rich side, can't find a vacuum leak.
Thermostat housing, I've used both the Chev (heater outlet on the pass.
side)
and currently have a GMC one with outlets on both sides ( for water heat to
both the Offy 2 X 1 intake manifold and heater) if I ever get that far
along. The water pump is from Patricks. There are two inlets for heater
hoses. I'm using the bottom one for the heater, it didn't have a plug in
it
when purchased, the top has a pipe plug, that'll be the return for the
water
heat from the manifold.
The flow through the radiator appears to be good, but it overheats whether
the cap is off or not. When it's off and the engine running and the
coolant
level is about a 1/2" below the filler neck no coolant ever spills out, no
matter what the engine rpm is. Just lots of bubbles.
Thanks,
John.
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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