Thank you for reaching out with your question regarding the heat resistance of our polyurethane engine mount bushings—specifically PU Engine Mount Front Bushing 290016B—and whether the material can endure the high-heat environment of a De Tomaso Pantera (1971–1991) engine bay.
Heat Resistance of Our Polyurethane Material
Our polyurethane bushings, commonly used in suspension and engine mount applications, are designed to operate reliably under a wide range of temperatures. The typical operating temperature range for these parts is:
- -30°C to +120°C
- (-22°F to +248°F)
If the polyurethane is located near a heat source (such as headers or exhaust manifolds), it is crucial to ensure adequate thermal insulation. This can be achieved through the use of heat shields, thermal tape wrapping, or other methods to reduce direct heat exposure.
Exposure to temperatures above 120–130°C (248–266°F) may lead to polyurethane deformation, especially under continuous load or stress, which can compromise performance and longevity. Therefore, additional precautions should be taken when installing polyurethane bushings in high-heat zones.
Specific Considerations for the Pantera
The De Tomaso Pantera is known for its mid-engine layout, where heat buildup in the engine bay can be considerable—especially in modified models featuring aftermarket headers or upgraded 351 Cleveland engines.
Model Overview (1971–1991):
- Pantera (1971–1974) – Powered by a Ford 351ci (5.8L) V8, typically producing ~330 hp.
- Pantera L (1972–1974) – “Lusso” version with upgraded cooling and impact bumpers.
- Pantera GTS (1973–1985) – High-performance model, initially for European markets.
- GT5 / GT5-S (1980s) – Wider body, upgraded suspension, and brakes.
- Pantera 90 Si (1990–1991) – Final limited production version with fuel injection and redesigned styling.
These models are often subject to performance upgrades that can raise under-hood temperatures beyond the norm, making heat management essential when using polyurethane mounts.