Cooling - Page 6 - Team Camaro Tech
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post #76 of 87 (permalink) Old Feb 27th, 19, 03:18 AM
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Kevin
 
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Re: Cooling

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Originally Posted by 68rs406 View Post
Is the sensor rod completely isolated from the head casting then?
Iím not talking 30 degrees here, but on an iron head Iíve seen 10 degrees from head to intake. Iíve seen it, Iím not speculating.

If the OP has new everything and itís installed and running properly, which we really have to assume is the case because we are not there, there almost has to be something or a few somethings causing a higher than expected temp. Wouldnít you agree?
When obvious stuff isnít present donít you have to consider other avenues? Thatís what I do.
I would agree. In checking a water temp sensor/sender I had laying around, it looked to me like the probe is isolated by a sleeve from the outer "shell" that screws into the head (or intake manifold).

Perhaps the OP used an excessive amount of teflon tape on the threads prior to screwing in the sensor? The probe itself is a thermister, and the outer sleeve grounds itself to the engine when screwed in. I will only wrap the outer threads with one wrap of the teflon, allowing the inner threads to contact the engine metal for a good ground.

I do like the suggestion of using a heat detection gun to verify actual temps at the radiator, heads, and thermostat housing.

Never argue with an idiot; they'll only drag you down to their level, then beat you with experience.
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post #77 of 87 (permalink) Old Feb 27th, 19, 10:55 AM Thread Starter
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Re: Cooling

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I would agree. In checking a water temp sensor/sender I had laying around, it looked to me like the probe is isolated by a sleeve from the outer "shell" that screws into the head (or intake manifold).

Perhaps the OP used an excessive amount of teflon tape on the threads prior to screwing in the sensor? The probe itself is a thermister, and the outer sleeve grounds itself to the engine when screwed in. I will only wrap the outer threads with one wrap of the teflon, allowing the inner threads to contact the engine metal for a good ground.

I do like the suggestion of using a heat detection gun to verify actual temps at the radiator, heads, and thermostat housing.
If to much teflon tape is used what would be the result? I don't believe it would stop at 205 all the time, not sure.

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post #78 of 87 (permalink) Old Feb 27th, 19, 01:14 PM
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Lee, post a pic of your fan so the guys can see what fan you actually have.

1969 X66 396 LeMans Blue, M20, 373 (Sold)
1969 Convertible LS3 TKO 600, 373
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post #79 of 87 (permalink) Old Feb 27th, 19, 04:01 PM
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Re: Cooling

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If to much teflon tape is used what would be the result? I don't believe it would stop at 205 all the time, not sure.
I suppose sensors vary but the ones Iíve used, or that I recall at least, are a compression fit between the base and the nut that holds it in. Itís subject to the temperature of the metal it mounts to, or thatís my assumption based on what Iíve seen with temperatures right there.

In a perfect world the water right there should be on the cooler side once the water was pumping through the block with an open system, it enters from the radiator right near there after all.
But I have physically seen higher readings with the sensor there, and surface temperatures with a heat gun.
My belief is the really close proximity to the exhaust ports heats the metal of the head in that area up. Especially iron. And when the coolant isnít flowing freely it will be worse.

Again, either location works fine, perfectly fine, but Iíve seen 10* difference as I recall which is not earth shattering. But we are talking about 205 now, 195 would be even less concerning. I still personally like to see temps closer to the stat rating though, but you are not overheating. Just watch it.

Thatís my experience at least. Results may vary, consult your physician.

Sean

1968 rs with an old school 354" SB2.2 pump gas motor.

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post #80 of 87 (permalink) Old Feb 28th, 19, 09:50 AM Thread Starter
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Re: Cooling

I can't seem to upload a picture at this time. It says site can't be reached.

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post #81 of 87 (permalink) Old Feb 28th, 19, 10:20 AM
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Re: Cooling

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I can't seem to upload a picture at this time. It says site can't be reached.
Not sure if you know this, but you have to use Photbucket flickr or some other photo hosting site. Or be a paying member.

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post #82 of 87 (permalink) Old Feb 28th, 19, 10:29 AM Thread Starter
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Re: Cooling

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Not sure if you know this, but you have to use Photbucket flickr or some other photo hosting site. Or be a paying member.
Don't have any of that

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post #83 of 87 (permalink) Old Feb 28th, 19, 12:02 PM
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Re: Cooling

postimage is free and is what I use to put pics on this, and other, forums
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post #84 of 87 (permalink) Old Feb 28th, 19, 01:06 PM
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Re: Cooling

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If to much teflon tape is used what would be the result? I don't believe it would stop at 205 all the time, not sure.
I can't say for sure, but weak or poor grounds cause lots electrical issues. In this case? Perhaps not if it works to a certain temperature.

Never argue with an idiot; they'll only drag you down to their level, then beat you with experience.
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post #85 of 87 (permalink) Old Feb 28th, 19, 02:28 PM Thread Starter
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Re: Cooling

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Lee, post a pic of your fan so the guys can see what fan you actually have.

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post #86 of 87 (permalink) Old Feb 28th, 19, 02:49 PM
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Quote:
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Quote:
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Lee, post a pic of your fan so the guys can see what fan you actually have.
Pic says Blocked?

1969 X66 396 LeMans Blue, M20, 373 (Sold)
1969 Convertible LS3 TKO 600, 373
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post #87 of 87 (permalink) Old Mar 1st, 19, 04:34 AM
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Re: Cooling

Don't see a problem. The factory thermostat was 195*. These engines were designed to run at 195+ degrees, 205 isn't bad.
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