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 ElusiveStranger
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| posted on October 5th, 2006 at 07:17 PM |
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Temp senders & gauges (Suby)
Hi guys,
Now I'm actually on the road, all MOT'd (regoed?) etc I've noticed the Subaru H2O temp sender and VDO 40-120°C gauge are telling fibs (I
suspect).
What senders/gauges do you guys use when doing your Scooby conversions?
Engine is an EJ20 & the van's a 78 Bay (ex panel van).
Van goes well but the fan's coming on - I haven't boxed in the rear as yet so air is going over rather than through.
Cheers.
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pete wood
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| posted on October 5th, 2006 at 11:08 PM |
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you need the VDO senders that go with the guages. they should just screw into the motor in the right places to replace the factory senders.
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pete wood
A.k.a.: figure itout
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| posted on October 5th, 2006 at 11:12 PM |
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you need the VDO senders that go with the guages. they should just screw into the motor in the right places to replace the factory senders.
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1303Steve
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| posted on October 5th, 2006 at 11:19 PM |
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Hi
Theres an echo here. My 2003 motor only has 3 wire terminal for the ECU and suby gauge. Im going to drill & tap a hole for a VDO sender in the water
log.
Steve
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ElusiveStranger
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| posted on October 6th, 2006 at 12:57 AM |
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| Quote: | Originally
posted by pete wood
you need the VDO senders that go with the guages. they should just screw into the motor in the right places to replace the factory senders.
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Thanks for the reply Pete.
Are the VDO senders the same thread as the Scooby ie 1/8th BSPT? If not do you know what the thread size is please?
I did look at an early T25 sender and it wasn't a taper thread, also it didn't jut out into the manifold ie would sense the water manifold temp not
the water. (I'm thinking this would take a while to get to water temp)
Steve, my manifold is already in the van. It might be a bugger to do that now! Grrrr!
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GeorgeL
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| posted on October 7th, 2006 at 09:04 AM |
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| Quote: | Originally
posted by ElusiveStranger
I did look at an early T25 sender and it wasn't a taper thread, also it didn't jut out into the manifold ie would sense the water manifold temp not
the water. (I'm thinking this would take a while to get to water temp)
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Actually, since aluminum has a relatively low heat capacity (900 J/kg/C versus 4186 J/kg/C for water), the manifold itself will closely reflect the
temperature of the coolant circulating within. The heat transfer from coolant to aluminum is much better than that from aluminum to air.
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pete wood
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| posted on October 7th, 2006 at 01:12 PM |
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| Quote: | Originally
posted by ElusiveStranger
Thanks for the reply Pete.
Are the VDO senders the same thread as the Scooby ie 1/8th BSPT? If not do you know what the thread size is please?
I did look at an early T25 sender and it wasn't a taper thread, also it didn't jut out into the manifold ie would sense the water manifold temp not
the water. (I'm thinking this would take a while to get to water temp)
Steve, my manifold is already in the van. It might be a bugger to do that now! Grrrr!
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Sorry I don't know or can't remember. From memory we got a fitting from pirtek or something, but I can't remember whether it was tapered or not.
Take the sender down to a fitting shop like enzed or pirtek and they could tell you.
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baybuscamperkid
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| posted on October 10th, 2006 at 05:07 PM |
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yep, match switch to guage, if they dont have a switch the right dimensiond they will have an adapter to make it right.
Reimagined/Recycled/Upcycled Cool
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ElusiveStranger
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| posted on October 10th, 2006 at 07:05 PM |
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Thanks guys. I ordered a VDO one. The dealer said a 1/8 NPT would be ok in a 1/8 BSPT thread.
Apparently the bikers do it all the time one thread is 27 TPI the other's 28 TPI
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vwpete
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| posted on December 15th, 2006 at 11:03 AM |
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How did the sender go
Hi i c you have the same issue as me, i have the 150deg vdo temp gauge with original EJ sender and like you i am getting incorrect readings. I was
just wondering if the
1/8 NPT sender fitted ok?.
Was the VDO part number 323 420? or did you use the universal sender 323 900? or am i way off, any help much appriciated
cheers
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ElusiveStranger
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| posted on December 16th, 2006 at 01:54 AM |
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| Quote: | Originally
posted by vwpete
Hi i c you have the same issue as me, i have the 150deg vdo temp gauge with original EJ sender and like you i am getting incorrect readings. I was
just wondering if the
1/8 NPT sender fitted ok?.
Was the VDO part number 323 420? or did you use the universal sender 323 900? or am i way off, any help much appriciated
cheers
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(part no 47 001 060, 120°C) fitted just fine, nip it up
Runs approx 4-6° out on my VDO 120°C gauge (I borrowed a lab standard temp sensor, attached to the heater outlet on the water manifold)
The sensor may just foul the I/D of the manifold, just open out the manifold *slightly* at the bottom of the treads. Seemed more like a case of
removing the scale from the coolant.
You can see what happens if you try to reduce the sensor dia here:
http://www.vwkd.co.uk/bb/viewtopic.php?t=368
I'm in Pommy land so ETB aren't gonna be much help to you 
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