EJ20T water temp sender for VDO gauge.. help

Kai

Just looking for some clarification here... help

I'm going to be fitting a set of Porsche 924 VDO gauges into my Notch eventually. As these are from a Watercooled motor they have a temperature gauge included in the three gauges.

The Subaru water temperature has a an unusual 1/8 BSPT thread.

VDO uses 1/8 NPT

I realise that my options are to either make the VDO sender fit into the Subaru water manifold or I can use a resister to drop the reading of the sender.

From reading the below threads I'm happy to have a go at making the VDO sender fit into the manifold.

So following the link posted by Elusive linked to ETB instruments am I correct in believing I will require:

Coolant Temperature Sensor -⅛"NPTF (27)Thread, 40-120°C
Part number: 323 801 005 001

£11.89

( http://www.etbinstruments.com/Sensors_ancillaries.htm )

Reading these old threads

:

A: http://www.vwkd.co.uk/bb/viewtopic.php?t=2620&highlight=vdo

B: http://www.vwkd.co.uk/bb/viewtopic.php?t=2006&highlight=vdo

C: http://www.vwkd.co.uk/bb/viewtopic.php?t=368

Joel · Posted: Fri Oct 30, 2009 9:12 pm Post subject:

i dont reckon theres much in the thread differences

i screwed the 1/8th NPT sender for my guage straight in after i very delicately ran a drill through to remove that lip inside that stops non subaru senders going in

from memory theres only 1 thread per inch difference and being tapered threads they only screw in a couple of turns

alot of people just weld another boss on and tap the right thread in
i was to lazy to do that Grin

_________________
1974 1303 Germanlook Suba-Beetle
Subaru EJ254, BoostR 17", 4 Wheel discs, Topline suspension and A/C

ElusiveStranger · Posted: Sat Oct 31, 2009 12:40 am Post subject:

Jeepers!
The first linky goes to a thread (boom boom) that proves my set up's been OTR for 3 years with only one glitch.

Back on topic, my sensor still works. NPT into a BSPT, just don't overtighten.

So Kai, what clarification do you want? Laugh Out Loud

Japs (bikes from my knowledge) running BSPT has been going on for decades, Honda, Yamaha, Suzuki, Kawasaki all use BSPT for their temp sensors

PS. My gauge reads approx 8-10°C lower with my lights off. ISTR Gerrelt's does too. If you're aware of this, it's happy days
_________________
The advice you receive on here is worth the paper it's written on.
Your experiences are worth shed loads to others, including the f'ups - live and learn.
Wouldn't YOU rather learn by someone else's mistakes? So would they.

'78 Bay, 2 litre 091 box, EJ20 NA & the ashtray's on the 'right' side.
I don't lean forward for hills any more Grin

Bugger, missed out on "Live fast, die young"

easy-does-it · Posted: Sat Oct 31, 2009 8:04 pm Post subject:

As above, i just screwed in the 1/8 npt sender that came with the gauge..

... only i didnt pay attention to the 'dont over tighten' and snapped the bloody thing Sad

...

_________________
'76 bay going superfly TDI

ElusiveStranger · Posted: Sun Nov 01, 2009 3:27 am Post subject:

NEVER over tighten a tapered thread!

'There's a fair few who's split a dub return gallery in the process of "full flowing"

What did you snap? We need details so others don't follow suit ( better to learn from other's fcuk ups Wink

)

So what sensor you running now?
Did you effect a repair? How did you do it?
_________________
The advice you receive on here is worth the paper it's written on.
Your experiences are worth shed loads to others, including the f'ups - live and learn.
Wouldn't YOU rather learn by someone else's mistakes? So would they.

'78 Bay, 2 litre 091 box, EJ20 NA & the ashtray's on the 'right' side.
I don't lean forward for hills any more Grin

Bugger, missed out on "Live fast, die young"

currylager · Padawan Joined: 25 Apr 2009 Posts: 88

Bugger

. Drill out and re-tap to same size?, or drill out to larger size and try to find a larger sender?. The rest of the coolant manifold is quite thin apart from the sender bosses, so i doubt you could drill and tap another spot

_________________
HMMM, dont know yet, but i'll have a go!!!!

Kai · Posted: Sun Nov 01, 2009 4:30 pm Post subject:

So I'll be alright if I go for:

Coolant Temperature Sensor -⅛"NPTF (27)Thread, 40-120°C
Part number: 323 801 005 001

£11.89

Wink

currylager · Padawan Joined: 25 Apr 2009 Posts: 88

I used one of these fuel gauge kits from Ebay, the sensor it came with screwed straight into the hole of the old scooby one and did not strip the threads when bollocked up. Might be of some help perhaps??

http://cgi.ebay.co.uk/New-in-box-52mm-Water-Temperature-Car-Gauge_W0QQitemZ150382762184QQcmdZViewItemQQptZUK_CarsParts_Vehicles_CarParts_SM?hash=item230382d8c8
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HMMM, dont know yet, but i'll have a go!!!!

easy-does-it · Posted: Sun Nov 01, 2009 7:45 pm Post subject:

Snapped the head off the sender.. Sad

Still havnt got any water in the system so not sure if it's going to leak, but because im lazy ive bought an inline jobbie so hoping i dont have to strip down to remove it...
_________________
'76 bay going superfly TDI

Kai · Posted: Thu Dec 17, 2009 12:04 am Post subject:

So I was just about to create a post stating that the sender doesn't bleeding fit.... then I read this....

Joel · Posted: Fri Dec 18, 2009 7:51 am Post subject:

what was strange was when i swapped everything over to the new engine i didnt have the same issue

it must be the tinyest lip cos theres probably 0.05mm difference between the subi sender and aftermarket ones

i didnt remove the coolant manifold or anything on the old motor, just a drillbit in the battery drill with a bit of grease on it to catch any shavings
_________________
1974 1303 Germanlook Suba-Beetle
Subaru EJ254, BoostR 17", 4 Wheel discs, Topline suspension and A/C

Kai · Posted: Fri Dec 18, 2009 1:29 pm Post subject:

So... again I have another thirty minutes on the car....

I've measured my senders and there is about 1MM difference where the smooth bit meets the threaded section.

My VDO unit measured in at 8.4MM and the Subaru one was 7.4MM.

So I decided I'm going to run the 8MM drill bit in the hole as the 7 and 7.5 go through the hole and the 7.5 is slighty stiff to get through.

Can I find the 8mm drill bit......

I've got the 8.5 but that feels stiff going into the hole too and I don't want to stuff the thread in the manifold so I'll wait until I can get the correct bit.

This is preventing me from fitting the alternator bracket also the header tank.

So I might as well get on with the wiring, building the exhaust system, sealing the front rad in, making an airbox, fitting the boost control gizmo's, taking over the world.........

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Think......

Don't sleep and drive!!!