2.1 vs 1.9 thermostat housing

Post by **AIR_CHILLED** » 04 Dec 2016, 19:32

I have a 2.1 DJ which has a 1.9 DG inlet manifold and Weber carburettor set-up on it and I'm wanting to commission the electric heater in the inlet manifold.
I'm aware this circuit was also originally used for the electric choke on a Pierberg carb.

My question is can the associated temperature switch be fitted to a 2.1 thermostat housing or is there only one port?

I'm aware a 1.9 version has two ports one for the temperature sensor and the other for the temperature switch as per photo below:

I would just like to add I can't go freely looking at my van as it's in a lock-up / storage.

Many thanks.

Post by **itchyfeet** » 04 Dec 2016, 19:56

Only difference between the two is the 2.1 has an extra port for the oil cooler

2.1 has a 'choke' sensor ( temp2) where ths 1.9 has a thermoswitch for the carb heaters

Post by **AIR_CHILLED** » 04 Dec 2016, 21:40

Oh very interesting so as I'm not running on the injection system the temp2 sensor is redundant correct?
I can just buy a thermo switch and fit it in this location?

Post by **kevtherev** » 04 Dec 2016, 21:47

The manifold heating element can be turned on manually
I put a switch in the cab with a little tell tale lamp.

I can honestly say it makes no real difference during warm up to have the heaters, except in emissions.

Post by **itchyfeet** » 04 Dec 2016, 21:49

yes
https://www.brickwerks.co.uk/t3-parts/e ... -1747.html" onclick="window.open(this.href);return false;

https://www.brickwerks.co.uk/t3-parts/e ... -blue.html" onclick="window.open(this.href);return false;

Post by **AIR_CHILLED** » 05 Dec 2016, 05:43

Ok good to know it's an option if required.

I may just stick with connecting up the manifold heater / coolant circuit for now and see if this makes a good difference first.

Thanks.

Post by **itchyfeet** » 05 Dec 2016, 06:01

it also powers a heater in the carb.
As Kev says may make little difference, but it may do depending upon where you live, how cold it is, fuel you use.

Post by **ajsimmo** » 05 Dec 2016, 10:11

Not sure there is an anti-icing heater on the weber. But heating the manifold by connecting the coolant circuit should improve low rpm running dramatically. Warmed air and petrol vapour react much more readily than cold air and liquid dribbles!

Sent from my finger using Tapatalk

Post by **AIR_CHILLED** » 05 Dec 2016, 19:16

ajsimmo wrote:Not sure there is an anti-icing heater on the weber. But heating the manifold by connecting the coolant circuit should improve low rpm running dramatically. Warmed air and petrol vapour react much more readily than cold air and liquid dribbles!

Sent from my finger using Tapatalk

Yes I am very keen to find out if connecting the coolant hoses up will help improve my hesitation at low engine speeds, I have just ordered the parts required from VW Heritage

Then I will look to fitting the manifold electrical heater for cold starts.

Your correct the Weber does not have an electrical heater.

Post by **AIR_CHILLED** » 13 Dec 2016, 21:59

I fitted the thermoswitch in place of the blue temp 2 sensor along with a relay as per the Haynes manual and all appears to work correctly.
The coolant hoses were plumped in at the same time which has made the biggest difference to smoothing at low rpm hesitation.
I'm hopefully this will help with those cold winter starts.
Thanks,
Mike.

Club 80-90 Forums