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Cadillac Radiator Pellets


steve665

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I just purchased a 1979 Cadillac Eldorado Biarritz. I see by the service records

that the previous owner used the Cadillac radiator pellets when he changed

the coolant a few years ago. I just changed the coolant today, and wonder

if I should use them. The car has the 5.7 Oldsmobile engine. There are no

leaks in the cooling system at this time.

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It doesn't need them but they won't hurt anything either.

Kevin
'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

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I just purchased a 1979 Cadillac Eldorado Biarritz. I see by the service records

that the previous owner used the Cadillac radiator pellets when he changed

the coolant a few years ago. I just changed the coolant today, and wonder

if I should use them. The car has the 5.7 Oldsmobile engine. There are no

leaks in the cooling system at this time.

Hello Steve665. It's a possibility that if the previous owner was using the cooling system tablets, this could indicate that there is a cooling system leak somewhere and they were using the tablets to plug the leak. :blink: Possibly a cooling system pressure test to check for any leaks might be a good idea.

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Hello Steve665. It's a possibility that if the previous owner was using the cooling system tablets, this could indicate that there is a cooling system leak somewhere and they were using the tablets to plug the leak. :blink: Possibly a cooling system pressure test to check for any leaks might be a good idea.

Good point! I'm looking under it every day, and so far there are no leaks.

1%2079Cad%20a.jpg

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Hello Steve665. It's a possibility that if the previous owner was using the cooling system tablets, this could indicate that there is a cooling system leak somewhere and they were using the tablets to plug the leak. :blink: Possibly a cooling system pressure test to check for any leaks might be a good idea.

Good point! I'm looking under it every day, and so far there are no leaks.

1%2079Cad%20a.jpg

Well, with the cooling system tablets installed, it shouldn't leak, unless it was a large leak. Those GM cooling system tablets are very effective and I can highly recommend them. A pressure test will put pressure throughout the cooling system above and beyond its normal pressure, so if there was a tiny leak somewhere, it might rear its ugly head and save you from the cost and hassle of having that leak eventually make its presence known while on a trip or what have you. If you open your phone book yellow pages under, "Automotive, Repair", you can call around to various auto centers and ask how much a cooling system pressure test is. It's not an expensive test, but could save you a big hassle. Might be a good idea to do this, especially considering you aren't certain of the vehicles true history. An ounce of prevention is worth a pound of cure and peace of mind is priceless. Might be a good idea to keep an eye on the coolant level every day too. With a pen, you can mark on the coolant overflow tank where the coolant level is when it is hot vs cold and if it drops below either of those lines, you know you have a leak somewhere. But again, the cooling system tablets will plug up a small leak.

By the way, B-E-A-U-T-I-F-U-L car! Take good care of it, 'cause unfortunately they don't make them like that anymore! :)

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That is a very nice looking Eldorado! I always liked that style ('79-'85). How many miles, what color is the interior, etc? BTW, I wouldn't worry that someone installed sealant pellets in the cooling system. The Olds 350 was a rock solid engine.

Kevin
'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

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That is a very nice looking Eldorado! I always liked that style ('79-'85). How many miles, what color is the interior, etc? BTW, I wouldn't worry that someone installed sealant pellets in the cooling system. The Olds 350 was a rock solid engine.

The engine is solid, but there could be leaks in the radiator, the heater core or anywhere in the cooling system.

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As Kevin noted, I also like that body style and came close to buying one... beautiful car

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Beautiful car!!! Coolant tabs are not needed. Previous owner may have heard from a newer N* Caddy owner that coolant tabs are good for the system. Ditch the coolant tabs on your next coolant change and enjoy that sharp car!!

3100406887_808dbe1b91_m.jpg3100408453_191809e0a7_m.jpg
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  • 2 weeks later...
That is a very nice looking Eldorado! I always liked that style ('79-'85). How many miles, what color is the interior, etc? BTW, I wouldn't worry that someone installed sealant pellets in the cooling system. The Olds 350 was a rock solid engine.

Thanks for the compliment! It has 114,000 miles on it, red interior:

1CadInt.jpg

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That is a very nice looking Eldorado! I always liked that style ('79-'85). How many miles, what color is the interior, etc? BTW, I wouldn't worry that someone installed sealant pellets in the cooling system. The Olds 350 was a rock solid engine.

Thanks for the compliment! It has 114,000 miles on it, red interior:

1CadInt.jpg

That was the nicest looking interior that any Cadillac had - the Fleetwood Brougham d'Elegance from '80-'86 and Brougham d'Elegance from '87-'92 had the same type of seats.

How did you find your car? Was it for sale locally?

Kevin
'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

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I had a 1984 Fleetwood Brougham d'Elegance with that interior in it.

Probably the MOST COMFORTABLE SEATS I have ever had in a car.

Indeed the seats are comfortable. I'd like to be able to adjust the driver

seat a little though. It's not working. Maybe needs a switch.

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I had a 1984 Fleetwood Brougham d'Elegance with that interior in it.

Probably the MOST COMFORTABLE SEATS I have ever had in a car.

Indeed the seats are comfortable. I'd like to be able to adjust the driver

seat a little though. It's not working. Maybe needs a switch.

Check under the seat for a cut/bare wire by the seat track.

Some of them, the wires were long enough, that if the seat was was in a certain position, the wire could get cut when the seat moved.

Also check the fuse for the seat...but you have probably already did that. :D

The switches sometimes would get corroded contacts and quit working.

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I had a 1984 Fleetwood Brougham d'Elegance with that interior in it.

Probably the MOST COMFORTABLE SEATS I have ever had in a car.

Indeed the seats are comfortable. I'd like to be able to adjust the driver

seat a little though. It's not working. Maybe needs a switch.

Check under the seat for a cut/bare wire by the seat track.

Some of them, the wires were long enough, that if the seat was was in a certain position, the wire could get cut when the seat moved.

Also check the fuse for the seat...but you have probably already did that. :D

The switches sometimes would get corroded contacts and quit working.

Thanks for the suggestions, Jim. Everything under the seat looked good

so I took the switch out of the arm rest, unplugged it from its socket and

held it over a trash can and sprayed the heck out of it with electrical contact

cleaner.

That got it working well enough to adjust tilt and height, but the center contacts

that move the seat back and forth are too corroded to work. Fortunately the

seat is positioned comfortably enough for me to allow plenty of time to look

for a reasonably priced power seat switch.

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