Fix needed - temp probe too long/deep for water jacket !

Garp · Post by **Garp** » Sun Apr 10, 16 11:12 pm

Flummoxed !
I bought one of those generic 3-dial setups for the challenger as I was pretty sure my oil pressure and water temp dials were either disconnected or faulty.
Today, Justin (Dart Vader) and I successfully got the oil pressure rigged up but when trying to install water temp probe we found out (as he had before on his dart) that it's just too long and, in my case hits metal before the threads even meet.
The kit had a bundled extender but it was way too big, Justin had one that was sadly too small - so question is this :
Do you have one ?
Seriously though, I first need to ascertain what the actual thread into the water-jacket is on my 340, and then need to figure out what the name is for the doohickey I need ?
Temp probe adapter ? Temp probe extender ?
Is there a work-around or perhaps a dial that has a short probe ?
Thanks all

Blue · Post by **Blue** » Mon Apr 11, 16 6:58 am

Manifold is 3/8" NPT, you need a water temp gauge adaptor, Auto meter make them.

Garp · Post by **Garp** » Mon Apr 11, 16 7:35 am

Blue wrote:Manifold is 3/8" NPT, you need a water temp gauge adaptor, Auto meter make them.

Cheers Blue - solved in one !

Dart Vader · Post by **Dart Vader** » Mon Apr 11, 16 9:16 am

get me one at the same time please garp !

Garp · Post by **Garp** » Mon Apr 11, 16 9:44 am

Dart Vader wrote:get me one at the same time please garp !

.... will do ! Trying to find one locally today as Blue's link is Stateside.
G

Garp · Post by **Garp** » Mon Apr 11, 16 10:14 am

Got them - £18.00 each at a car shop, £3.00 each at a plumbers merchant !

"3/8 NPT Extensions ,Equal Male NPT Female NPT in BRASS, American Male-Fem Adapters"
Jobs a good-un

Blue · Post by **Blue** » Mon Apr 11, 16 11:42 am

Sorry, job's a bad 'un! You don't want an NPT to NPT adapter, the temp gauge sender is a straight thread with a flat seat, you need the right part ( Autometer 2272/2373/2271) and quite possibly you won't find one in the UK.

Garp · Post by **Garp** » Mon Apr 11, 16 12:21 pm

Blue wrote:Sorry, job's a bad 'un! You don't want an NPT to NPT adapter, the temp gauge sender is a straight thread with a flat seat, you need the right part ( Autometer 2272/2373/2271) and quite possibly you won't find one in the UK.

Hang about -
Blue, if the temp probe screw is a 3/8 NPT thread (and this would seat into the water jacket ) - surely, all I'm doing is extending that connection in order to shorten my temp probe ? Hence 3/8 NPT female to 3/8 NPT male - this is, in essence, the exact same fitting, just longer .....#
Made for thermostat probes for US fridge freezers as far as I can ascertain ...

I also see you used the term "temp gauge sender" - the one I'm using is a mechanical device - much like a large thermometer probe that actually just makes contact with the water in order to read temp - nothing electric here ...
Got me all confused !

Birdman · Post by **Birdman** » Mon Apr 11, 16 2:40 pm

As Blue stated you need an adaptor with the correct seat, I had the same problem.
Link www.speedwaymotors.com/Auto-Meter-2272- ... Sender-Ada...
Chris

Garp · Post by **Garp** » Mon Apr 11, 16 4:45 pm

Birdman wrote:As Blue stated you need an adaptor with the correct seat, I had the same problem.
Link www.speedwaymotors.com/Auto-Meter-2272- ... Sender-Ada...
Chris

Sincerest apologies Gents - you were right and I was wrong !
How annoying that even without an adapter, it never would've fit in the first place.
How do I know the thread on the captive bolt now ?
Stateside it is then. Unless someone has a spare.

Blue · Post by **Blue** » Mon Apr 11, 16 6:54 pm

I don't know what the thread is on the sender but having used several different makes over the years, they do all seem to be the same.

Birdman · Post by **Birdman** » Mon Apr 11, 16 7:57 pm

https://www.pegasusautoracing.com/produ ... ecID=12632
Thread 5/8-18 ( UNF I think)

Garp · Post by **Garp** » Mon Apr 11, 16 8:00 pm

Birdman wrote:https://www.pegasusautoracing.com/produ ... ecID=12632
Thread 5/8-18 ( UNF I think)

looks and sounds good ........

Garp · Post by **Garp** » Mon Apr 11, 16 10:05 pm

Ordered and coming with a friend.
Anodised red I can deal with as long as it fits - description seems "bang on".
Cheers guys, sorry I doubted you - how bloody arrogant of me !

Garp · Post by **Garp** » Mon Apr 11, 16 10:44 pm

Ordered and coming with a friend.
Anodised red I can deal with as long as it fits - description seems "bang on".
Cheers guys, sorry I doubted you - how bloody arrogant of me !