19 replies to this topic

[Hammy of hamhouse]

Hi,

 

On the turbo model is there any existing fitting that can be used, on the head, or stat housing, to mount an extra  temperature gauge sensor ??  or maybe even in the rad if not?? - I'd rather avoid the cut and fit one in the hose solution.

 

 

thx

 

H

[Rickwoo118]

Just out of interest why do you need an extra water temp sensor? Can't a scan gauge detect this and give you another indication?

[Hammy of hamhouse]

No probs... like most things -even owning a vx its a "want" rather than an abolute "need" thing, and peolpe put there stamp of the cars in their own way ( coming from the kit car scene I "need" to add something LOL )

 

You are right a scan gauge would do the job, but....

 

I would really like to fit an oil press and temp gauge - partly (mainly?) as I'm a gauge tart and partly because I like the ease of reading with analog gauges, and with the idea of doing track days I 'd like to keep an eye on things.

 

I don't really like the look of scan gauge type lcd displays (personal thing), even though it might be a bit better than the standard.  There are one or two other OBD2 type 52mm gauges around which can read water temp, but again they have a digital display ( without buying, i'm unsure of readability) or cost an absolute arm and a leg.

 

So its a question of weighing up the options, if there was an easy place to fit a sender ( and I confess, can't see one atm ) then that would be a good econoimcal solution. If I can't so it I might chance my arm on an OBD2 type deive (but prob still 52mm).

 

Thx for the interest tho.

 

http://www.autofiend...-200-obd-gauge/

 

Edited by Hammy of hamhouse, 27 July 2013 - 09:16 AM.

[Hammy of hamhouse]

ok , looking about under the lid I noticed this on the rear *flywheel end) of the motor:

 

 

looking closer up the there is a sensor mounted  ( water temp?) and just near to it a blanking plug with a square head ( slightly rusty) - is this an access point to the coolant ?  [On the conventional car ,in place of this block is the heater conenction to the block], so it is cololant related and the header tank connnects to this block too- it looks 1/8" npt ( or I hope it would be) - any ideas ?

 

 

 

 

 

[Hammy of hamhouse]

Can anyone help here , please ?

[siztenboots]

That would be the fitting for an EGR valve . there is a channel cast in to the cylinder head from #4 , but this does not go anywhere past the water block. I will try and fish out the spare water block casting so you can see if there is enough material to tap in a second sensor where the oem one is.

[siztenboots]

not sure if this picture shows up ( an upside down cylinder head ), but it gives you an idea about the water pocket and where the EGR channel would be

 

[ghand]

Can't you just parallel up with the existing sensor or do you need a separate one?

[Hammy of hamhouse]

Hi, thx for the pic and your reply/help so far - still need bit more info !!

 

.  yes I think the block I'm talking about does fit over the top of that section on the head and the bolts you show hold it in place. - is the central hole there a water channel ?, if so I could be in business?

 

Just fopr clarification , I was talking about the rusty square headed stud that is adjacent to the "brass" sensor, below the torq bolt, as below with a pencil pointer! - seems to be a plug,??.

 

I don't think you mean this stud was for EGR mounting ?

 

 

 

[ghand -you need a sensor to match the guage and doubling up would only work with som3ething like a high impedance data logger -I dont know what this sensor

is either!]

Edited by Hammy of hamhouse, 30 July 2013 - 11:26 AM.

[Andrew aka Stuwy]

why not just cut into the rad return pipe from the front of the car and give yourself less wiring?

[Claws]

I still don't fully understand your logic on having 2 temp readouts. On the Stack at a glance : 3 numbers = starting to get a bit hot 2 numbers = ideal, especially if the first one isn't a 7 -- = too cool/massive coolant leak that you would have noticed anyway

Edited by Claws, 30 July 2013 - 04:34 PM.

[Hammy of hamhouse]

Claws - see my earlier post; i just want/prefer one !!  but am seeking a good neat technical solution to do it     There is never any logic where cars are concerned IMO,  or I'd have a push bike and use a taxi !

 

 

The rad hose up the front is worth a look, if I can get to it!  but meanwhile back to my square headed screw.....

Edited by Hammy of hamhouse, 31 July 2013 - 08:03 AM.

[siztenboots]

I think the brass nut was an EGR temperature sensor , but I can only find this on a vauxhall workshop manual for intermittant problems with wiring problems for that, but only on EGR equipped earlier models. I am struggling to find a picture of the water temp housing on the net, but have a spare one in the garage when I get a chance to photo it, all will be obvious.

 4. Electrically sepparate wiring harness (picture III).

    · Sensor - oxygen exhaust (6)    · Sensor - coolant temperature (7)    · Sensor - temperature (8) 

 

[Hammy of hamhouse]

A pic - if you'd check that, then that would be excellent Mr Killer.

 

That pic you've just posted above has the EGR fitted, as you say, and a temp sensor in position 8, . - where I think my plug is fitted (I don't have EGR), so that might well have sorted it .(the brass nut sensor  at "7" I already have)

 

 

Hope its a  1/8NPT thread ! - seems likely if its a temp sensor.

 

 

thanks for the post!!

 

 

[siztenboots]

but I am guessing that is the channel where exhaust gas would vent to , that is where the brass bolt taps into.

 

I will have a look at my VX and see if I have the same , I don't remember there being one.

[Andrew aka Stuwy]

How about replacing the front bleed nipple with a sensor?

[techieboy]

Why would you want to measure the coolant temp, post-radiator? That maketh little sense to me.

[Hammy of hamhouse]

If we are talking the same thing, The brass thingy is a wired sensor not a plug on my car  - this agrees with the picture position  7 . "coolant sensor". Position 8 on mine has the square headed bolt - I'm hoping 7&8 connect into the same water chamber.

 

Maybe I ought to pull it out and see if I get wet ! ..........anyhow, as said, should be obvious when Mr killer has a look

 

thanks for this help !

 

Turbo model don't forget !

 

 

(@Mr Doom ; Just so !)

 

 

 

 

Edited by Hammy of hamhouse, 31 July 2013 - 02:58 PM.

[siztenboots]

right I taken off the water sender housing since no pictures exist on google.

I can confirm the second rusty bolt is indeed in the same water channel as the main sender , see pic below
 

[Hammy of hamhouse]

Thank you very much for that Mr Killer -much appreciated !

 

 

problem solved!!