Yes, your symptoms indicate restricted flow in the radiator, so rodding it out should take care of it. What are the numbers on the top of the radiator - is it a 947 (last three digits)?
Medina, a 1971 T-code Monaco
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Yes, your symptoms indicate restricted flow in the radiator, so rodding it out should take care of it. What are the numbers on the top of the radiator - is it a 947 (last three digits)?
rags
Senior Member
could be solder bloom. got to the point where it constricted the radiator.
You may end up w/ a radiator any way. Most radiators older than 30 yrs. can be hopeless plugged or fall apart in the rodding out process. Wish you the best of luck.
My70monaco
Member
I had the same running hot at speed problem several years ago on my 70 Monaco 440 with A/C after I had replaced a leaky water pump with an 8 blade pump. Had to keep the car around 70 or it would get too warm. Then I read that a 440 with A/C should have a 6 blade impeller and non A/C 440 should have an 8 blade pump. So I replaced the 8 blade pump with a 6 blade and the problem went away. Forward to the past 5 years after replacing my original 440 with a '78 RV 440 in 2015. I had to use the entire original water pump assembly with the 6 blade impeller off my 440 on the '78 440 because the RV unit was different (also had to use oil pump and pan). Well the running hot at speed has returned. Maybe I should the 8 blade impeller on this engine even though the car has A/C???
Thank you for the suggestion! However, I don't think that's the issue in my case. The reason why I don't think the water pump is the issue, is because I replaced it last summer and then I put approximately 1k trouble-free miles on in the following two months. The only change made since, is because there was an issue with a post-replacement leak at the gasket. @71Polara383 fixed it when he removed the motor this spring -- no more leak. The pump, therefore, is likely blameless.
Medina went to her second Midwest C-Body Show today. Before heading out this morning, @71Polara383 and I posted a couple of photos of her at his shop together with two other cars we took there. Attached below is a photo that I took at the end of the afternoon, after getting back from Randall Oaks.
Behind her is Buttercup, a 1972 NYB. Amazingly different appearances for two cars that were built on the same "platform". I really like both!
IMHO, after one and half years and almost 3k miles of restoration/troubleshooting since I bought her last February, Medina is back to being a comfortable car that runs/drives/handles/brakes well. She's now pretty much ready for real long-distance driving, which is why I bought her in the first place. Before she's ready for several trips halfway around the country on which I plan to take her, Wyatt needs to fix a couple of leaks we've recently discovered (in the power steering and the A/C compressor), get the radiator rodded, and have the A/C system recharged with R12. And... that ought to be it! (@fc7_plumcrazy will say that the most important thing is to get the stripe painted over, but that will not happen till she hets back her original livery, i.e., not before next spring at the earliest).
Behind her is Buttercup, a 1972 NYB. Amazingly different appearances for two cars that were built on the same "platform". I really like both!
IMHO, after one and half years and almost 3k miles of restoration/troubleshooting since I bought her last February, Medina is back to being a comfortable car that runs/drives/handles/brakes well. She's now pretty much ready for real long-distance driving, which is why I bought her in the first place. Before she's ready for several trips halfway around the country on which I plan to take her, Wyatt needs to fix a couple of leaks we've recently discovered (in the power steering and the A/C compressor), get the radiator rodded, and have the A/C system recharged with R12. And... that ought to be it! (@fc7_plumcrazy will say that the most important thing is to get the stripe painted over, but that will not happen till she hets back her original livery, i.e., not before next spring at the earliest).
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LeBaron1973
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Personally, I Iike the stripe, makes your car distinctive, you can always say its a 1 of 1.
Lol
Lol
Yeah, I hate the stripe too. But... not enough to park her... enjoy the car, I'm thrilled that you've given her so much of Wyatt's attention (probably keeps him out of trouble too
). I would never fault you for just keeping her as she sits, since the stripe is painted on and she looks so good otherwise... I do love you just a little more for wanting to bring her back to original though.Really missed you guys at Carlisle, I am so looking forward to next year.
fc7_plumcrazy
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Jeff and I could buy some red metallic paint and make an inbetween fix for the stripe, my friend
Carsten
Carsten
I'll hold your beer... that way I can deny responsibilityJeff and I could buy some red metallic paint and make an inbetween fix for the stripe, my friend
Carsten
bigmoparjeff
Senior Member
If the burgundy is base/clear, and the stripe is painted on top of the clear, you could very carefully sand it off. But if a new paint job is part of future plans, then it's not worth the trouble.
I don't like it either, but on the other hand I've seen much, much worse.
Jeff
I don't like it either, but on the other hand I've seen much, much worse.
Jeff
Samplingman
Old Man with a Hat
You could always do a temporary vinyl black stripe, it would hide it somewhat.
LocuMob
Fluid Technician with a hat
I think that would look worse that the white stripe.
Heating issue solved! Rodding out the radiator apparently did the trick. @71Polara383 took Medina out this afternoon for "stress-testing" after taking the rad to a specialized shop last week for cleaning. During his ten miles of "spirited driving" on the highway, the temp gauge barely went over halfway -- in his words, this performance is "much much better than the last time on the highway." Outside temperatures in Rockford were the same as what I experienced in Wisconsin earlier this summer when the issue first became apparent, so hopefully Medina is all ready for the CATL.
What's left? Replace a leaky gas cap (ordering NOS P/N 3583561 from @marty mopar), fix an annoying exhaust leak, and finalize the A/C rebuild (all ready for adding refrigerant, but that will probably wait till after the winter -- at this stage, the need for A/C is nil).
Here she is parked today, with a cover over the driver's seat to protect her from grease marks -- thank you Wyatt!
What's left? Replace a leaky gas cap (ordering NOS P/N 3583561 from @marty mopar), fix an annoying exhaust leak, and finalize the A/C rebuild (all ready for adding refrigerant, but that will probably wait till after the winter -- at this stage, the need for A/C is nil).
Here she is parked today, with a cover over the driver's seat to protect her from grease marks -- thank you Wyatt!
Don Stolfi
Member
Nice pic!
How much longer is Buttercup?
Thanks Don!
If memory serves, about 4 inches longer. In this picture, the Monaco looks sorta like a long deck/short deck car, whereas the NYB looks sorta like a "cab forward" car. Both cars work really well in person. Strikingly different looks.
Medina passed 79k miles around noon today while on the 2020 CATL drive. Thanks to @71Polara383 for all the work and making her a smooth ride!
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Not only is the odometer worth noting, so is the temperature guage showing it to be exactly where it should be. Congratulations!
Thank you! Today was a nice fall day, with afternoon temps in the mid-70s: the gauge barely budged even when @sixpkrt and I kept up with the fast traffic on the highway back from the CATL. I put close to 400 miles on Medina this Sunday, she performed like a champ: I think she’s ready for even bigger trips next spring
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