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Old 16th December 2013, 13:13   #1
ronbax
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Default precision components inline housing stats

have had this housing fitted for approx 2 1/2 years; the initial stat failed very quickly, i replaced it with a qth107, temp rating 93 deg; this stat has a bleed indent in the flange, and i only acheived 93 deg showing on the obd by driving hard!! i replaced it with another qth107 - same result - the expansion tank is warm at 83 deg !!.
can someone suggest an alternative; the stat has a 54 mm flange.

regards
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Old 16th December 2013, 13:32   #2
Ken Lion
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Have a look at this thread re the Renault inline stat

http://www.the75andztclub.co.uk/foru...ad.php?t=74451

or this one, although it may take you a week to read it
http://www.the75andztclub.co.uk/foru...ad.php?t=68468

Last edited by Ken Lion; 16th December 2013 at 13:35..
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Old 16th December 2013, 17:37   #3
wuzerk
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Quote:
Originally Posted by ronbax View Post
have had this housing fitted for approx 2 1/2 years; the initial stat failed very quickly, i replaced it with a qth107, temp rating 93 deg; this stat has a bleed indent in the flange, and i only acheived 93 deg showing on the obd by driving hard!! i replaced it with another qth107 - same result - the expansion tank is warm at 83 deg !!.
can someone suggest an alternative; the stat has a 54 mm flange.

regards
All of the diesels will only reach max temperature under load, as soon as you cruise the temperature will drop. There is a standard size thermostat from
STANT which is rated at 205F (96.1C) but I found it ran a bit hot for my liking.
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Old 16th December 2013, 17:59   #4
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I have a Precision Components housing and the stat in mine is 91 degree C.

I got it from "DoctorCarParts" it has no bleed hole and runs my car between 84 and 105 degree C depending on conditions.

The part No. is Thermostat FT104.92

Cheers, Pete.
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Old 16th December 2013, 18:09   #5
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My first stat died within a week, replacement has been in 3 weeks and again beginning to leak past at way under 88 degrees (viewed by the obd) just wondering if retailer has a dodgy set of Stats.A Question to someone who knows where is the temp sensor situated? before or after the OEM stat placement? Would this make any difference to the temp showing on the OBD and when the inline stat opens??

Regards

Chas
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Old 16th December 2013, 19:09   #6
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Quote:
Originally Posted by chas_1 View Post
My first stat died within a week, replacement has been in 3 weeks and again beginning to leak past at way under 88 degrees (viewed by the obd)
Is this an OEM stat or the in-line version?

Quote:
A Question to someone who knows where is the temp sensor situated?
It's located between two of the inlet manifold ports.

Quote:
before or after the OEM stat placement?
Don't understand.

Quote:
Would this make any difference to the temp showing on the OBD and when the inline stat opens?
The temperature displayed on the diagnostic screen is generated from the signal given by the sensor. The type of stat won't alter that. The figure displayed is temperature of the head, which is what you need to know.

TC
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Old 17th December 2013, 06:09   #7
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I was a bit vague,mine is an inline stat by precision components,my question about the sensor location you have answered thank you(i was just interested on location for reference) and now i know, my question on the stat placement is immaterial.problem i have is that warm up is still taking an age (even with inline stat fitted) But with OBD temp showing 70 degrees both sides of the top hose where the stat is fitted are hot (its an 88 degree stat) and even when the FBH fires up and is working temp gets to about 75-78 degrees and then sinks back to 70-72 degrees(this because the FBH stops) then rises again as the FBH kicks in again.Would fitting a hotter stat help? I am stumped to be honest and getting more than a little fustrated.

Regards

Chas
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Old 17th December 2013, 08:16   #8
wuzerk
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Quote:
Originally Posted by chas_1 View Post
I was a bit vague,mine is an inline stat by precision components,my question about the sensor location you have answered thank you(i was just interested on location for reference) and now i know, my question on the stat placement is immaterial.problem i have is that warm up is still taking an age (even with inline stat fitted) But with OBD temp showing 70 degrees both sides of the top hose where the stat is fitted are hot (its an 88 degree stat) and even when the FBH fires up and is working temp gets to about 75-78 degrees and then sinks back to 70-72 degrees(this because the FBH stops) then rises again as the FBH kicks in again.Would fitting a hotter stat help? I am stumped to be honest and getting more than a little fustrated.

Regards

Chas
From your report it certainly seems that your 'stat is opening too early.
In a working diesel system it would reach the rated 88C and above when the engine is working hard but would fall to around 83-84C when cruising.
70-72 C is too low. So,if you have an 88C stat fitted it should be replaced.
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