hi..
yes...the pressure bottle is the one in the engine bay with the pressure
cap on it. ( blue cap )
here's all I ever do ..
and I change out T3 engines almost dozens of times a year.
I do add coolant while it's idling.
I am very aware of how the level drops when revved..
I never even bother with that anymore ..
I just get in all the coolant it will take ..first with engine off, then
with engine idling ..
( do open the bleed valve on top of the thermostat housing )
'sure' ..sometimes I will do the bleed at the front thing ..
but I have not found them to be critical that way at all.
I do watch them very carefully for days after having the cooling system
open ..but I just fill 'em ..
and put more in when they'll take it.
I 'mgiht' bleed to the front ...but not always for sure every time.
I think there is naturally a small air space at the top of the rad ...that
will be there a few minues after you bleed it even .
To be fair, I did have one case of a syncro-subaru T3 van ..
where it was happier after bleeding to the front.
re the flashing LED ...
sure, try the old one.
also ..
connection to that sensor ..
if the connector does not make contact...the LED will flash
continuously.
If you jumper to two wires trying to trick it...it will still flash
continually.
when I want to trick that system I jumper the connector with a resistor
..
what size almost doesnt' matter....2.2 ohms say ...whatever is in my subaur
engine conversion resistor stash.
I have had brand new ( cheap ones though ) level sensors not seal, or not
stay in place in the pressure bottle in the threds there.
if it's working ..
I tend to leave that part alone.
More and more I learn ...
'leave well enough alone' ...so often we think ...just one little tweak
.
just one little part will bring it from say 90 % really nice to
perfect...and we loose ground doing that. ..
and wish I had left it alone ..
that's an art though ..knowing what to leave alone and what to
replace...where parts that are not just totally worn out are concerned.
if it was me I'd probably whip out my cheater resistor, plug it in ,
confirm that I had a properly working cooling system ..
and then address that one issue later.
you did have both heater vavles fully open right ?
what type coolant did you opt for ?
I don't think blue is neccessary really ..
I did use conventional green with my 'secret' water soluble oil added as a
rust inhibutor and water pump lubricant ..
and for my really keeper vans I'm going over to Dexcool now. ..with the
water soluble oil added ..
machinist's cutting oil. Been doing that for 25+ years to hundreds of cars
and vans..it works.
Scott
----- Original Message -----
Sent: Wednesday, March 09, 2011 3:11
PM
Subject: Re: [Syncro_T3_Australia] The
Blinkies
Right guys, thanks for responses, much appreciated.
I sensibly hadn't thrown out the old sender, just thrown out the bit of
my brain that new where it was.
When I flushed the cooling system i noticed the o ring had gone hard and
square edged. Rather than try to find an o ring I thought a new sender was in
order. I know what you mean about cheap parts but the new one is genuine vw
with the correct part no.
However, put the old sender in this morning, topped up the water while
revving, put on cap. Switch off. Start up on tickover light goes out. Rev
slightly - blinkies again.
I drove it to work, temperature gauge within range, no overheating so
seems to be working fine apart from the light.
I carefully squeezed the connectors in the plug to make sure they were
tight but it's all clean in there and the light does go out so i think it must
just be air in there somewhere or some other electrical fault.
With the expansion tank cap off even high revs only make the level go
down to just below the cap. This wouldn't happen if i'm just raising the revs
a touch would it?
The level in the expansion tank does go down a bit while warm and returns
to the original level when cold. When I open the radiator bleed the water runs
clear with no bubbles.
Scott when you say the pressure bottle you mean the one in the engine
bay? So do you top up with the engine running?
Grrr
Gary
On 10/03/2011, at 7:40 AM, Scott Daniel - Turbovans wrote:
I get just fine results with topping up the coolant in the pressure
bottle after every warm-up/cool-down cycle .......for about 5 cycles.
that is if low coolant in that bottle when revved is what's
turning on the warning light.
or try the old sender. I only replace those if there is a real reason.
I don't even many new parts are as well made as the older ones were.
Scott
----- Original Message -----
Sent: Wednesday, March 09, 2011 2:01
AM
Subject: [Syncro_T3_Australia] The
Blinkies
Hi all, need some help, have a bad case of the blinkies. Temperature
red light flashing that is.
I drained and flushed my cooling system through because it had not
been done for some time.
I put a new sender in the header tank because the prongs looked a bit
yuck and a new blue cap.
I put 3 bottles of g12 ++ into the header tank and then filled
up with water. I opened the radiator bleed and topped off the header
until it ran clear with no bubbles. Revved to approx 2000 rpm and kept
topping up the header until it would take no more, bled and repeat. Im
puttting on the blue cap at 2000rpm or so while the water level has
dropped. Connected up expansion tank pipe, filled expansion tank started
etc. Engine starts and runs up to temperature as normal, fan comes
on.
So does the pesky red light all the time. From cold the light will go
out when starting as it should but as soon as I raise the revs it comes
on. Start warm and it's on all the time.
Any ideas?
Gary