KATOOM

<br><br>Yes your right, but I dont see where you are trying to go with this unless your just being informative and again your right. The manifold cracks from the fast drop in temperature (hot to cold). The expansion joints eliminate the pulling. Does the ATS manifold leak at any time, motor hot or cold?

BigBlue

You know you don't have a life when you sit on a message board all day and argue about what part will expand first when heated and how the rest of that part will be affected by a small hole in it. : After reading through 5 pages of mumbo jumbo, I have finally arrived at the answer to the original question(whatever that may be). The probe will eventually work itself out from the hole in the exhaust mainfold as it contracts/expands as it is heated up.

Mexstan

Mumby-jumbo on this site??? Nah, can't be

BigBlue

pop99

Been changing ring gears for years. Must have been doing it the wrong way!!!

Shovelhead

This ain't one a them Austrailia things like the water swirlin' t'other way in the terlet is it?

Mexstan

[quote author=Shovelhead link=board=7;threadid=16839;start=60#161885 date=1058662092]<br>This ain't one a them Austrailia things like the water swirlin' t'other way in the terlet is it? <br>[/quote]<br><br>Exactly. You finally figured it out. When you heat the water it swirls the other way.

Mexstan

Man, this thread has really gone down the toilet!!!
To answer the last question: Elementary my dear Watson. The size of the hole gets bigger or smaller depending on the size and the consistancy of the object(s) deposited therein. Then of course you have to factor in the heat factor of the deposited objects, the rotational speed of the liquid, whether it is the southern or northern hemisphere and you have your answer. No mumbo jumbo whatsoever.

thecatsfan

So if I can get the exhaust gas to swirl the other way, because of the Coriolis Effect, or some other undefined phenomenon, will that reduce my EGTs?

Mexstan

[quote author=thecatsfan link=board=7;threadid=16839;start=60#161904 date=1058666656]<br>So if I can get the exhaust gas to swirl the other way, because of the Coriolis Effect, or some other undefined phenomenon, will that reduce my EGTs? <br>[/quote]<br><br>Not necessarily. You first have to define a phenomenon before you can use for said purpose.

BigBlue

I have 3 words for yall. GET A LIFE!!!!!!!!!!!!

Edward

<br><br>Katoom <br>The expansion joints have never leaked on my ATS exhaust manifold. The engineering and quality is second to none. If someone were to ask me if I had it to do over again would I buy another one? The answer would be, darn right I would.<br><br>Edward<br>

emjay

We all agree heat expands. where (or what relative direction) the material (exhaust manifold in this case) expands is dependent on the mechanical structure, which is complex for a cast manifold. That means that where the hole is drilled may make a difference as well. <br><br>Consider the sponge analogy presented earlier. If you have a flat, dry sponge, and punch a hole in it, the entire sponge will expand when wetted, including the hole. Repeat the test with the sponge restrained on all four sides, and the hole will get smaller when the sponge is wetted.<br><br>If you're really bored, go drill a few holes in your manifold, and measure the diameters hot and cold. Don't forget to plug 'em up when you're done. <br><br>And besides that, there's Murphy's law which means that it's gonna blow outta there anyway, hot or cold. The simplest solution is to install the probe properly in the first place! <br><br>

Mark Thomas

That is why they heat electric motor spindle bearings so they will slide into position when rebuilding the motor. Same principle with metal in manifold. Here is food for thought, I designed a maching fixture for a cnc tapping center and the location pins I put in the pallet I froze in liquid nitrogen and they dropped right in, when they again reached ambient temp they would never come out again!