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1998 Eldorado
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Discussion Starter #1
I have 98 Eldorado. The right rear wheel (alum/alloy I believe) has a slow leak. Last time in the tire shop they tried to smooth the inside of the rim and it worked for a while. It still leaks but slowly. Any reason I can't put a tube in it?
 

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Cadillac Technician
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No you should be able to install a radial tube in there, no problem.

However if you want to try an alternative procedure... here is a TSB that GM released a couple years ago for some trucks with a porosity problem with the wheels.

Remove the tire and wheel assembly from the vehicle. Refer to the appropriate service procedure in SI.
Locate the leaking area by inflating the tire to 276 kPa (40 psi) and dipping the tire/wheel assembly in a water bath, or use a spray bottle with soap and water to locate the specific leak location.
Important:

• If the porosity leak is located in the bead area of the aluminum rim (where the tire meets the rim), the wheel should be replaced.

• If two or more leaks are located on one wheel, the wheel should be replaced.


If air bubbles are observed, mark the location.
- If the leak location is on the tire/rubber area, refer to Corporate Bulletin Number 04-03-10-001A or newer - Tire Puncture Repair Procedures for All Cars and Light Duty Trucks (SI Document ID #1573203).

- If the leak is located on the aluminum wheel area, continue with the next step.

Inscribe a mark on the tire at the valve stem in order to indicate the orientation of the tire to the wheel.
Dismount the tire from the wheel. Refer to Tire Mounting and Dismounting (SI Document ID #1332544).
Remove the tire pressure sensor. Refer to the appropriate TIre Pressure Sensor removal procedure in SI.
Scuff the INSIDE rim surface at the leak area with #80 grit paper and clean the area with general purpose cleaner, such as 3M® General Purpose Adhesive Cleaner, P/N 08984, or equivalent.
Apply a 3 mm (0.12 in) thick layer of Silicone - Adhesive/Sealant, P/N 12378478, or equivalent, to the leak area.
Allow for the adhesive/sealant to dry.
Notice: Caution must be used when mounting the tire so as not to damage the sealer. Damaging the repair area may result in an air leak.

Align the inscribed mark on the tire with the valve stem on the wheel.
Reinstall the Tire Pressure Sensor. Refer to Tire Pressure Sensor installation procedure in SI.
Mount the tire on the wheel. Refer to Tire Mounting and Dismounting (SI Document ID #1332544).
Pressurize the tire to 276 kPa (40 psi) and inspect for leaks.
Adjust tire pressure to meet the placard specification.
Balance the tire/wheel assembly. Refer to Tire and Wheel Assembly Balancing - Off-Vehicle (SI Document ID #664222).
Install the tire and wheel assembly onto the vehicle. Refer to the appropriate service procedure in SI.
Parts Information
Part Number
Description

12378478
Silicone - Adhesive/Sealant

3M®

08984
3M® General Purpose Adhesive Cleaner
 
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