Niagara Gazette — • Engine oil and transmission fluid sealers: This category of chemicals, when added to engine oil or trans oil, restores aged-hardened rubber seals that are leaking so that they are once again soft and supple. As the seals swell, they tighten against the mating surface and the leak stops. However, in short order the sealer chemical wears out, the seals return to their hardened state, and the leak is back. It is for this reason I do not recommend using these products. Have the component re-sealed or rebuilt. You can’t restore rubber to seals, nor can you restore metal to sealing surfaces. Don't waste your money on such foolishness. Fix the problem or risk causing more damage (and that means more money out of your pocket in the long run).
• Radiator stop leak: These chemicals are designed to course through the cooling system to the location of a leak. When the stop leak product finds an exit from the cooling system, it starts to close the leak by “building on itself” as it exits the system. However, problems arise when system pressure is restored. For example, in the case of aged and brittle radiators, wear is relative and another leak will spring up. In addition, “stop leak” tends to stop up other small orifices in the system such as heater cores. A plugged heater core causes the vehicle’s heater to malfunction. Finally, I have seen so much stop leak used in an engine that it literally clogged up an entire bank of water jackets. These are passageways lining the cylinder walls through which engine coolant flows, transferring heat away from the engine. This stuff harms more cars than it fixes.
‘Til next time ... Keep Rollin’"America's Car Show" with Tom Torbjornsen airs 7:30 p.m. Wednesday, 9 a.m. Thursday and 11 a.m. Saturday on WBBZ-TV.