Oil temperature is running very high (280-300F) on 1985 Jetta GLI, although
the water temperature remains normal. Oil consumption and appearance is
normal. The sending unit was changed, with no effect on lowering the
temperature shown on the multi-function computer display.

Thanks,

Wayne

"Wayne Faas" <wfaasNOSPAM (AT) mchsi (DOT) com> wrote

Check the engine oil cooler...IIRC the GLI is just a Jetta version of the
Golf GTI, with the 10.0:1 CR 1.8L

"Wayne Faas" <wfaasNOSPAM (AT) mchsi (DOT) com> wrote

This doesn't answer the original question, but where is the "Multifunction
computer display" in the A2 GTI ? In the instrument cluster where the
upshift arrow would be on the base model ? or is it a completely different
instrument cluster ?

I'm wondering if one could be fitted to my '85 base-model Jetta.

- FM -

Fred Mau wrote:

See photo at http://www.dieselgeek.com/images/DCP_2170.JPG. The MFA is
at the bottom center of the cluster.

I doubt very much that you can retrofit just the MFA section, but you
could replace the whole instrument cluster with one that has the MFA.
You would need to also install the oil temperature sender (I believe it
sits on the oil filter flange), the outside air temperature sender and
the replacement windshield wiper stalk with the MFA control buttons on
it. The MFA relies on engine vacuum to calculate gas mileage. If you
have the upshift indicator or the fuel economy display, then you
probably have the vacuum line pulled up to the cluster also. The MFA
also needs the tachometer signal. Not sure if it is pre-wired for it in
cars without a tach or MFA, but it wouldn't surprise me.

The MFA relies on engine vacuum and the tachometer signal to calculate
gas mileage. The MFA is calibrated for each particular engine type, so
if you install an MFA from a different model it may not be accurate in
your car.

Finally, if you do put in a cluster with MFA, you could transplant your
old odometer into the new cluster to keep the old odometer reading. But
then, your old odometer probably stopped working at around 120 k miles
like so many others...

"Fred Mau" <fred-dot-mau (AT) comcast (DOT) net> wrote

above the row of 'idiot' lights", and below the idiot lights is the water
temp gauge? Well, its where the water temp gauge is at, since in the
GTI/GLI models the tach has a water temp gauge in the bottom of it. I'm
pretty sure you would need the entire instrument panel, plus the sending
units, plus a new turn signal stalk, since the end of the stalk has teh mfa
button plus a slider to reset and switch between the display modes.

"Biz" <biznospam (AT) att (DOT) net> wrote

My bad, of course its the windshield wiper stalk, and NOT the turn signal
stalk like I erroneously posted b4.

Thanks to everyone for their input. The 85 Jetta GLI does have a
multi-function display and the vacuum triggered up/downshift indicators.
However, I can't swear the instrument panel is 100% like the one pictured.
By the way, the odometer is still working at 161,000 miles. Also have an 87
16V GTI with 224,00 miles on a working odometer, but I may have fixed the
split hub on the odometer gear.

The oil and filter was changed on Monday after the car was home this past
weekend after being driven for 8 hours on Sunday. At 4,000 miles, the oil
looked normal and partially clear. Monday afternoon, the Jetta was driven
for 4 hours at interstate speeds and only for the last hour did the oil
temperature begin to increase above the 230F range to 280F. I have asked the
owner to notice the outside temperature gauge when the oil temperature
starts to spike, but it will be 3 weeks before the car is driven for more
than a 1/2 hour at one time.

Regards,
Wayne


in article SuNuc.15861$_k3.377149 (AT) bgtnsc05-news (DOT) ops.worldnet.att.net, Biz at
biznospam (AT) att (DOT) net wrote on 5/31/04 4:31 PM:

I had an 86 GLI (with oil cooler and MFA). I don't remember the numbers, but
I do remember that when I pushed the car hard the oil temp went up
considerably without the coolant showing much rise (but 280 does seem high).
I do miss that car <sniff>.

"Wayne Faas" <wfaasNOSPAM (AT) mchsi (DOT) com> wrote

My 85 GTI only hits 180's F if I push it....I have no idea how you can get
one up to 230F let alone 280F...
"Rick De Visser" <devisser (AT) sympatico (DOT) ca> wrote

On Wed, 2 Jun 2004, Biz wrote:

Install new thermostat/temp senders? Worked for me. Frankly, it freaked
me out the first time I drove it afterward....

kelly

-+-

'86 Jetta GLI, 302K and counting