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CHT removal _ hot or cold engine?

New thread on a current issue I am resolving with help of others on this board.

When removing my CHT from my 84 3.2, with 50k and 15 years on it, do I want the engine hot, cold or warm?

PB blaster applied twice in cold engine so far. Have not touch the sensor yet.

I know the first turn on the sensor is the most important to removal without incident.

Thanks, Dave

Old 03-09-2016, 09:40 AM
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I replaced mine with a cold engine. This little bugger was difficult. The grommet was a pain, use soapy water. Cut the wire and use a deep 13mm to remove. Have you made the 14mm special socket to install yet? I got a grinder and a cheap deep 14mm from Sears, and put a groove in it so the wires would slide by.

Make sure you buy the two wire.
Old 03-09-2016, 10:03 AM
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Sorry but what's a CHT?
Old 03-09-2016, 10:22 AM
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Quote:
Originally Posted by Avanti View Post
Sorry but what's a CHT?
CHT is Cylinder Head Temperature sensor. FWIW, I replaced mine in my 3.6 cold. Used a modified deep socket with a slot in it and penetrating oil.
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Old 03-09-2016, 10:38 AM
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I did mine cold. Cut the wire, use a good quality socket that fits properly.

I guess it is physically possible to do it on a hot engine but that sounds like a great way to have some new burn scars.

I made a tool to install the new one. Just a little grinder work and Dremel work. Look around on the other threads on CHT removal. A picture of the tool is worth a ton of typing. Easy to make the tool.
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Old 03-09-2016, 10:47 AM
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Here's a pic of a modified socket posted by brujo65:
http://forums.pelicanparts.com/porsche-911-technical-forum/904281-3-2-60-days-sitting-bad-miss-under-load-2.html

Are people saying the old one is 13mm? I know the new replacement ones are 14mm
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Old 03-09-2016, 10:53 AM
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Did mine cold.
I anticipated problems but it was thankfully easy.
If you do remove it warm, I would do the install cold.
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Old 03-09-2016, 11:37 AM
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13 out, 14 in

As I remember it several years back, it was a 13mm that came out but since I was removing it for replacement, just cut the wires and used a standard socket. To install, I took a deep 14 or again as I remember it, took a decimal deep socket (there is one pretty close to14mm) that was spare not being used in my box and slotted that to install. You only lightly torque it.
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Old 03-09-2016, 11:43 AM
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Thanks All, came out nicely with PB Blaster and cold engine. Just waiting for the new one in the mail........

Dave

Old 03-09-2016, 12:04 PM
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