A35Plt
Active member
Wow, this thread has fallen all the way back to page 6. I think Tom is taking this retirement thing a little too far!!

I hope all is OK. Didn't some cyclones go through Illinois for the first time in 30 years a couple of weeks ago?
Concerned Lyndon
I have to admit I am enjoying retirement immensely. I've been putting in some long days and . . .
Thomas

Thomas, is that valve going in the fuel line, clutch line or in the brake line? I did hear of someone putting a key operated valve in the hydraulic clutch line as an anti theft measure.
By the way I have the book now. Just got to our hero buying his first Corvette and having to learn to drive it.
Judging from the look of the original fitting, I'd say it's a heater hose ******. Looks like that valve is designed to manually shut off coolant flow to the heater core.
Ran into a problem that Kroil would not budge - the 1/2" pipe thread spark plugs on the old car. Tweaked 3 wrenches trying.
Started thinking on it a bit - I've been using Synthetic 0W20 motor oil (Valvoline or Mobil 1) on various pieces of steel I don't want rusted mid-job (like gun barrels and actions), it actually has a very slight de-rusting effect... anyway, tried something different - put a "dollop" of the 0W20 around the base of the plugs at the head, then followed it with a dollop of Kroil.
15 minutes later - the plugs - while tight - came out. My guess is the kroil thinned the 0W20 and allowed it to creep down into the threads *and* lube them up.
Love my Kroil. Miracle in a squirt can!
Thomas,
I have to say thankyou again for your postings... I copied one of your ideas to make
View media item 50088A large square to clamp bits I am welding to to reduce welding distortion etc
Thanks!
Thomas,
Why did you not use one of these ?
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With a knob inside the car to pull out or push in to turn on and off.
Ill let you know how it turns out.Some higher priced automobiles have a vacuum operated hot water shut off valve going to the heater. This was common in the sixties.
Walt
My guess is that these cars don't get driven in then cold very often so the valve will normally stay closed. For the rare occasion where heat might be needed, the little unobtrusive valve underhood is easy to open. It might be a good idea however to purposely circulate water through the core a couple times a year just to keep the valve free and the water in the heater mixed with the rest.
Keep an eye on your temps Thomas. Not sure about the early vettes but on later cars this can cause an overheating issue since the heater core is considered part of the cooling system and cutting it out reduces the cooling of the engine.
The heater acts as a coolant bypass for the thermostat until the engine warms up enough to open the thermostat. .....
That's really cool, I've never heard of that! How long does it take to flush out the soap residue?When you get to the point of flushing the system out use dawn dishwashing liquid. I had it recommended to me once and had a really nasty car to do. I couldn't believe it did more than the normal flush you buy, but it did. I actually saw chunks of rust and all kinds of **** come out of the system by using it. It seems to break up the rust scale better and remove impurities like you can't imagine.
On the small block Chevy, the bypass is internal...through the hole circled here in red.
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And that VR-4 has me drooling.....
Guys, most engines (that I am aware of) have a built-in bypass for the water pump. jbmatth, if your Cobra engine is a small block, there is an "L" shaped hose going from the water pump to the thermostat housing. That's the bypass hose. If it's an FE motor, that 3" straight hose between the intake manifold & water pump is your bypass hose.
On the small block Chevy, the bypass is internal...through the hole circled here in red. BTW, I'm just using this pic for reference, I'm not affiliated with the company.
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That's really cool, I've never heard of that! How long does it take to flush out the soap residue?
Some old cars and trucks had a similar manual cut off to the heater core back in the day.
The air cond. cars had the vacuum and cable operated heat control valves as shown by Thomas.
If we hang around the Center of the Universe long enough there will not be anything left for us to learn.
Vince
C_F is correct on SBC. BBC uses external rubber bypass for closed thermostat.
If you use Dawn then it will flush out as soon as the system is clean.That's really cool, I've never heard of that! How long does it take to flush out the soap residue?

Wow is that thing ever clean! Good luck with sale. Saw a cross post from Jalopnik.
Is that a MarkVIII I see in the background there?
BTW, this thread is what got me on GJ. Totally awesome restore/build thread.![]()