TimC
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| posted on 6/11/06 at 07:56 AM |
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R1 5PW Thermostat mounted sensor
Hi
Does anyone know what thread the temp sensor on the thermostat of the injected R1 is?
Cheers
TC
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chockymonster
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| posted on 6/11/06 at 10:29 AM |
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I seem to remember it being M10.
If no one else answers I'll have a look this evening for you
PLEASE NOTE - Responses on Forum Threads may contain Sarcasm and may not be suitable for the hard of Thinking.
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TimC
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| posted on 6/11/06 at 10:48 AM |
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Cheers - I'm just trying to work out what sensors to order for my SPA multi-guage.
I haven't actually got the thermostat yet - that's Saturday's job.
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smart51
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| posted on 6/11/06 at 10:52 AM |
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My 4xv has a fin pitched 10mm sensor on it. I don't know if the 5PW is different
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Coose
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| posted on 6/11/06 at 11:29 AM |
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It could possibly be 1/8 NPT - the Thermo-unit on a 5JJ is.....
Spin 'er off Well...
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TimC
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| posted on 6/11/06 at 12:25 PM |
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Ok, let me explain my plan since you guys may tell me that I'm barking up the wrong bush.
My engine is a 5JJ and I have a 4XV/5JJ thermostat which doesn't have a temp sensor on it. I'm not using the R1 clocks and am instead
using an SPA digital guage to monitor oil pressure (through cooler bolt) and water temp.
My plan is to use the later thermostat which has a mount for a temp sensor. This keeps it neat and 'factory looking.'
Am I doing something daft?
Ta
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speed8
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| posted on 6/11/06 at 02:03 PM |
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It doesn't tell you the thread size in the service manual, only tighten to 18Nm...
I don't see anything wrong with what you are doing, as far as I can tell the only purpose for the sender in the 5PW is to tell the ECU to turn
on the fans once it reaches a certain temp (apart from the obvious temp gauge).
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TimC
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| posted on 6/11/06 at 02:34 PM |
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Good point - also worth stating that I'll be using a rad mounted switch to look after fan operation.
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ChrisGamlin
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| posted on 6/11/06 at 06:23 PM |
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Speed8, I think the sender on the 5PW does more than simply tell the ECU when to switch the fans on and give a reading for the temperature gauge.
Being fuel injected, the ECU obviously controls fuelling as well as spark, so I imagine it would need to know the water temperature to allow it to
fuel correctly for cold start enrichment etc?
Tim, if you don't want to buy a new thermostat just for that purpose you could always do what I did which is quite neat and puts the sender
exactly where you want it to measure water straight out of the block.....
 
Digidash Temperature Sender
Chris
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JoaoCaldeira
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| posted on 6/11/06 at 11:33 PM |
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Just to have temperature in my dash without messing with R1's sensors I did use
this in th rubber pipe above the block, jut before
the thermo housing. Very easy to install.
Joao
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TimC
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| posted on 7/11/06 at 10:23 AM |
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Good thinking Joao - that's probably the way I'll go now.
Cheers
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chockymonster
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| posted on 7/11/06 at 10:36 AM |
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quote:
Originally posted by JoaoCaldeira
Just to have temperature in my dash without messing with R1's sensors I did use
this in th rubber pipe above the block, jut before
the thermo housing. Very easy to install.
Joao
Aren't the hoses to the thermostat 19mm?
PLEASE NOTE - Responses on Forum Threads may contain Sarcasm and may not be suitable for the hard of Thinking.
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TimC
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| posted on 7/11/06 at 03:50 PM |
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Chockymonster -
Did you get a chance to see what thread it was?
Ta
TC
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ChrisGamlin
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| posted on 7/11/06 at 06:40 PM |
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Those hose adapters seem a bit of an extravagance just to fit in a temperature sender, think of the weight! 
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ChrisGamlin
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| posted on 7/11/06 at 06:40 PM |
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Those hose adapters seem a bit of an extravagance just to fit in a temperature sender, think of the weight!
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Winston Todge
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| posted on 7/11/06 at 07:05 PM |
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Does your temp sender sit right in the flow of coolant Chris?
The stub looks quite long?
Any effect on readings?
Chris.
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ChrisGamlin
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| posted on 7/11/06 at 07:16 PM |
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I think in that pic it wasnt fully screwed in, but the sender is quite long and the tip sits just proud into the flow. I didnt want it with the whole
bulb end in the flow because it could restrict the water coming out of the head, but where it's absolutely fine as is, Ive checked with the
original bike clocks also connected and its spot on, it actually reacts to temperature changes better than the original bike sender.
You certainly do need it in the flow though, when I first tapped that I wound the taper tap in too much so it leaked with the sender installed. I put
in a small adapter I had laying around with the sender in the other end just to get me going and unsuprisingly it was useless, the sender was only
about half an inch away from the flow but it was consistently ~20c lower than the actual reading, and took about 10 minutes to react to significant
changes in temperature.
[Edited on 7/11/06 by ChrisGamlin]
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JoaoCaldeira
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| posted on 9/11/06 at 08:24 PM |
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quote:
Originally posted by chockymonster
Aren't the hoses to the thermostat 19mm?
They'll fit... trust me  a bit of heat and they'll do fine
There is no smaller adapter... 
Joao
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tks
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| posted on 10/11/06 at 10:27 AM |
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mhh
how much mm of the tip did you introduce in the stream??
Thinking of making a sensor bos to for a bosch sensor it has a 17mm tip of 7,5mm diameter.
would 4mm be enough?
Tks
The above comments are always meant to be from the above persons perspective.
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TimC
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| posted on 10/11/06 at 07:07 PM |
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Last time I ask.....
Does anyone know. In the interest of under bonnet neatness, I want to go for it, but it'd be good to know - just so I can see if I can get a
'thread adaptor' if needed.
Help!
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chockymonster
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| posted on 10/11/06 at 07:15 PM |
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Tim,
I tried to get it out tonight but it just wasn't moving and I didn't fancy destroying something else. I've sprayed it with some wd40
and will have another look in the morning
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TimC
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| posted on 10/11/06 at 07:23 PM |
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Thanks - much appreciated.
TC
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chockymonster
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| posted on 15/11/06 at 03:41 PM |
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Tim,
I can't get the sensor out. It just won't undo.
Paul
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