Another update...serviced the AC and kept the rpm at 2000 for about 30 minutes (very helpful wife)while adjusting the freon level (open the lid, add freon, close the lid, wait, open the lid, add freon, close the lid, wait, ad nauseum). Oil temp stabilized around 8:30 to 9 o'clock. As I added freon and the AC started cooling down, the oil temp actually dropped. The supply and return lines to the oil cooler up front warmed up nicely. Don't think I ever heard the oil cooler fan running, but with the engine noise and front condenser fan running, I may not have heard it. Didn't notice any significant airflow coming from the cooler. These temps seem to indicate things are operating normally based on the inputs from everyone earlier in the thread. I'll have to wait till it gets into the 80's later this week to see how the oil temp is in stop and go traffic. Perhaps part of the problem was that my AC wasn't serviced well previously and the deck lid condenser was shedding all of that excess heat to the engine compartment. Perhaps if the AC is serviced to the right levels the AC system runs cooler thus decreasing the heat shed from the deck lid condenser and impacting the oil temp. Still learning....any inputs are much appreciated.

 

Things sound normal.....

I bought my 89 coupe in (cold) November,..using the existing config, as bought (oil/filter, etc.) I think the guys were running a Castrol or Valvoline,...nothing under 20W for winter, and not over 40 on the hot side.

GRANTED,..the seasons are changing,..with Mother nature temps going crazy........In any case,..I recently changed over (l2 weeks ago), to Mobile 1, 15W/50 and new OC54 filter. Naturally, Mother Nature decide (coincidentally) that she will raise the environmental temps for a week or so. Pain trying to factor this in, as a new owner. Results,..on a 77 degree day (NOT a mid summer GA.day with the NASTY humidity....totally different, I'm sure..) would show cool temps at highway driving (speeds above 70MPH) with it lurking around 185/190 degrees F on the backroads a bit slower...(A/C NOT on)

Stop and go, she hit a 207-210 but recovers with air flow (i.e.,: MOVEMENT) Previously I was running cooler in all aspects but I do believe the weather was much cooler in Nov/Dec. (AGAIN: the factorial) In those days, I SELDOM saw anything above 180-185 degrees F even with AC on forever...

So: here comes spring then the ultimate test of a GA. high humidity summer...on goes the monitoring.

I was surprised to see that the Mobile 1 seems to come up to temp a bit quicker (15W?) I always idle her for a minute for gauge checks, seatbelt connections, radar detector mounting, coffee mug positioning, walking around the car, etc...THEN I'm off,...keeping revs below 3000 RPM until I see 140 degrees F then not above 4000 RPM until I see about 160-165 degrees.....no garage warm up crap, just as the Zimmer and others have posted. However, the temps are a bit warmer (M/Nature) so I'm having to interpolate the process a bit, amongst the oil change (selection, particularly).

I'll continue to check the front oil (aux) lines. I do recall a very similar situation where I check these and found various temp levels per length of oil line...There are NO observable crimps in the lines of ANY kind.
I want to see the aux return line nice and toasty...I definately will install the lower temp fan thermo and probably a new aux thermo, just to have my hardware baseline (if you will)..

Do you guys find that at 205 degrees F, that you cannot keep your hand on the oil filter for more than 3-4 seconds.....? It's NOT warm...it's quite hot. Normal?

Also,..have any of you doublechecked your center console temp guage (89) (environment/not engine) for accuracy? Where exactly is this guage sensing from? Is the temp sensor within the guage: meaning it's reading the temp INSIDE the car ,..OR,..is it somewhere else? I like to make use of this guage but only if it serves the relevant purpose......

Sorry for the ramble,....all of you guys are the BEST!!

And best, to you all,

Doyle

 

Well, 205 F IS hot to the touch!

 

YES, you are correct sir....

Gonna' throw a temp sense strip on to measure.....time to break open the manuals/PET and locate this damned environmental temp sensor for the floor console guage.

Best to all,

Doyle

 

I put the 99C BMW switch in my 88 Carrera and have been very happy with it. It equates to approximately 210-212F and comes on automatically. I didn't want to do the switch under the dash. The difference between the factory temp switch (single pole-244F) and the BMW (dual pole) is that you have to make a ground wire. I made the wire 6-8 inches long, put a spade connector on the temp switch end and put an eyelet big enough to put a 10mm head bolt trhough it on the other end. There is actually a 10mm bolt about 3 inches from the temp switch on the cooler. That grounds the system and voila, I was on the road.

 

Amen, bro"!!!! Gotit!! I'll check mine upcoming..

Thanks!!

Doyle

 

Doyle, I guess what I meant to say is that 205 should be hot to the touch and possibly normal. It's practically boiling, and if I stuck my hand in almost boiling water, I would get burned.

 

Agreed.......Thanks!

Best,

Doyle

 

Update...a few years later...as the temps warmed up this year, my oil temp creeped up again toward 120C/248F. My oil cooler lines to the RF wheel well just weren't heating up. Replaced the RR wheel well thermostat and it instantly improved temps keeping them down at the 90C/194F range and oil lines to the front cooler way too hot to touch. With AC running today in stop and go traffic and 108 Heat Index (96 temp plus high humidity in Florida), I got oil temps around 110C/230F and stabilized. It's nice to not worry about the oil temp going to the red and be comfortable in Florida in a cab with the top up and the AC on.

In an effort to knock another 5-10C off the oil temp I am going to either change the RF fan oil cooler thermostat to a lower one or put in a switch to manually control the fan so it comes on prior to 240F. I am thinking of doing the oil cooler scoop as well. Might as well take advantage of every tool.

 

bump-- funny thing is i just read this entire thread over again and thought .. gees what took him so long to change that stat..

 

How in the world do you have 82 posts in Jan 07 and have 82 today? You been sneaking around other boards on us ??

Edward

 

the avatar and post count is always current .. it does not show istorical . Edward look at all your posts you ever made .. it should show curent post count.

 

hahaha ...I never knew that! Man I feel lame. Thanks ice!

Edward