I think this plug is in the coolant circuit. It located on the right head at the back at the firewall. This engine is upside down so rotate your head appropriately.

Other coolant plugs / drains.

The other side

Thanks guys! I actually think I've finally nipped the temp issue...I've replaced the radiator with the new Behr and refilled her with a gallon of MB coolant and remainder with water. Took her on the road last night and ran the hell out of her.80-82 steady. Had the defroster on hot/max and pulled her into the driveway and topped her off and took her back out. Again, 80-82 degree temp and burning hot heat blowing.

Took her around the block with the A/C on and temps steady.This morning brought her in to work with no problems and the REAL test will be in the stagnant traffic with 90+ outside temp which I think will be no problem for her but we'll see. I popped the hood when I got in this morning and all of the coolant is in the tank, and I could even open the cap without boilover which was awesome! I don't think I needed to replace the thermostat but I'm glad I did (and I kept the old one anyway so...). Seems like my baby's back to her old self again. I also put new Beru wires on her which has greatly improved the throttle response and eliminated the rough idle she's had lately. Again, thanks for the advice. Next project is to replace the front brake pads this weekend, and I'm waiting on my THREE sets of euro headlights to come through customs in 2 weeks to be installed! Whooooa!:D

Alan

DJNEWK2,

So, you replaced the radiator and the thermostat at the same time? Aaacckkk .... if you did, we all may have missed the opportunity to see which one was the problem ...

I had been "betting" it was the tstat since you noted earlier it had a replacement radiator in it.

Can you fill us in on this?

No I replaced the t-stat a few weeks ago thinking that would solve it but it didn't. I only replaced the radiator last night. I'm keeping the Nissens because its not even a year old and get the particles that gathered in it professionally cleaned out. I always wanted to put a Behr in her anyway and I got this one new for the same price as the cheap Nissens with reinforced necks to boot!

It would have cool spots on one side and although I was getting close to lowering the temps at times, it would climb once I got her off of the highway it would shoot up and every so often it would come down a bit but not much below 100 so the aux fans would dang near always have to work. So far the 45-55 mix I've got right now works best for her (knock on wood) will keep ya posted.

Thanks for the follow-up ... great to know that it was radiator and not tstat ... this will likely help someone else as they troubleshoot their problems using this thread!

I have had overheating gremlins before and I though they were gonna drive me nuts ... it is probably a great relief for you to be able hammer it and then cruise in hot traffic with confidence!

BTW, one of the side effects I noticed after replacing my tstat was that it seemed to warm up faster than before ... have you had the same experience?

I actually didn't really notice a difference because it would always warm up within a good quarter mile or less before which is why I didn't think anything was wrong with the t-stat. That's one good thing I like about the car is that when its cold as crap outside, it would have nice heat (along with the heated seats) in no time.

OK Alan, you've had a couple days, and if your weather has been anything like our it is hotter than all get out. So what's the verdict, is it fixed????

yeah, we're all waiting. my bet was on a plugged radiator...

Hello fellas!
To update everyone on the final verdict (as Mike T would put it), my baby's dong just fine and it has been doing constant 80-82 degrees with or without the A/C running in the 90+ degree heat out here. I figured it had to be the radiator too and thanks to everyone for their input.

The highest the temp has gone was yesterday on an infamous road (Roswell to those in Atlanta) where you barely move an inch a minute to get back to the interstate.The fiance and I were meeting at a restaurant to exchange cars (because her mom and her aunt and cousin came down to look at wedding dresses and go to the bridal shows this weekend and her little convertible was unbearable and she needed the "limo").

She reached about 88 or a bit over and the aux fans didn't even have to kick in! Once I got going and traffic let up she was back down to 80-82 within a few seconds...So as of now the high temp saga has finally ended and the "squashed passenger saga was over for my fiance and future in-laws thanks to the "limo" who showed them all comfortable (and roomy) southern hospitality. :) Once again, thanks guys for all of the advice and hopefully the next project (my euro light conversion ) will be another pleasant ending! By the way Mike, did you get to see Ashman's euros? Mine are awesome and I've still got an extra set available that I may end up giving up.

Alan

No Alan, didn't get to check out Ashman's, but did get to check out Placo1's. I think his were DEPO's, nice clear glass and bright reflectors. A set or euros would look just right on the 560.

Actually Placo1's are Hella 500E euro lights.

The DEPO's that Alon has look exactly like the Bosch euro's that I have installed on mine.

Great News!

A great thread as we covered about EVERYTHING ... someone will be very thankful with their problem in the future.

Yea tell me about it...I was going crazy about what it could possibly be. I thought it was the radiator but didn't want to accept it because it was still "new" so I guess the advice I would give anyone is "just because its new doesn't mean it can't screw up" :) Mike, how's the 560 doing anyway? I kinda miss it...you need to post a pic of the Blitzen mobile in its current state dude!

Hopefully I'll be putting up a 126 euro light conversion story together complete with pictures soon. I've gotta get my hands on a pretty good digital camera because I know I'll just have ANOTHER roll of film to get developed if I don't. I think I still have pictures of the 1996 Olympics that I haven't even developed yet:eek:

I've noticed that my blower motor fuse blows a lot and has even melted the bottom portion of the fuse holder so that I have to keep a piece of a broken fuse down in the hole where the connector should be to make a connection with the bottom and the top of the fuse. This was a problem when I got her and its just burning further and further down.

I want to replace the fuse with an independent 30 amp blade type fuse and wire it directly from the blower motor. Any ideas or is it a better way of avoiding this? I wonder if I have to replace the WHOLE fusebox with new connectors or am I able to take sections of the fusebox out and replace? I noticed that after 1986 the blower motor's fuse is located in a separate space other than under the fusebox door like the rest of them.Is this a reason for this or what? Just wondering before I take matters into my own hands.I really don't want to "rig" this,but she's blowing the fuses (25 amp) a lot and the smell of the burning comes through the vents when its about to blow---getting on my nerves. Thanks.

Alan

P.S. I shouldv'e just started another thread with this one huh?;)