Something's a bit off in this explanation.
The guy's pump is running slower, so he gets higher temperatures. Makes sense
so far. But drilling holes in the thermostat cures the problem, by allowing
some flow when it's closed? Wrong explanation. If he's too hot, the thing
should be wide open, and the additional holes serve to decrease the restriction
at the thermostat, increasing the flow. Without knowing how many holes, and how
big the stock opening is, it's hard to say how much of a difference it makes,
but it must make some. And the car will take longer to warm up.
Remember the discussions of a few weeks back. This result adds to the evidence
against those folks who want to slow the flow to improve the cooling.
Stu
______________________________ Reply Separator _________________________________
Subject: cooling hot tigers
Author: Non-HP-owner-tigers (owner-tigers@autox.team.net) at
HP-ColSprings,mimegw3
Date: 8/28/97 1:44 PM
A friend told me about this " Tech Tip" from the Summit Racing Catalog page
85. So I thought I would pass it on to you all and see what you think .
Could this possibly help our hot running Tigers? Regards Armand Ritchie
Little Holes, Cooler Car
Our tech department handed us a letter from Mark Rael of Santa Fe, New
Mexico. It seems like-well, we'll let him tell you.
"After installing and underdrive pulley set on my dodge 440, I started
experiencing a hot engine when I slowed down in traffic. I tried all the
usual things: more water/less coolant, a flow cooler water pump, and even a
new radiator. Nothing worked. I wasn't overheating, but I was running too
hot for comfort.
I was going to try and electric fan when I called you Tech people, In
the course of the conversation, your Tech guy mentioned drilling a few 1/8"
holes in the flat border area of the thermostat to allow coolant
circulation before the thermostat "officially" opened. I had an extra
thermostat lying around, so I tried the idea. Needless to say, It worked.
Funny that a five-minute modification on a three dollar part was all it
took. None of the books I have or prople I talked to had a clue about such
a simple thing. Thanks to that sharp tech, I have a cooler running car."
ritchie@mcn.org
Armand & Lorie Ritchie
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