An Ounce Of Prevention – Antifreeze and Coolant Service

The Importance Of Antifreeze/Coolant Service Take a look at these photos, notice the brown areas of clogging and material at the bottom of the radiator? Nowhere is this more frequent than on engines using an aluminum cylinder head, and cast iron block…like most modern cars. And we also find this clogging not just in radiators, but also in heater cores. A heater core is a radiator-like device used in heating the cabin of a vehicle. Hot coolant from the vehicle's engine is passed through a winding tube of the core. Fins attached to the core tubes serve to increase surface for heat transfer [...]

By | July 6th, 2021|Case Studies|Comments Off on An Ounce Of Prevention – Antifreeze and Coolant Service

Audi TT Quattro 1.8 Turbo – Defective Water Pump

This car has was diagnosed with a defective engine coolant pump. Symptoms were overheating and noise from the front timing belt area. Disassembly of the front cover and timing belt, no easy task on at Audi TT, allowed for removal and inspection of the pump. As you can see from the photos, it is a bit of a process to access the pump, so be sure to always replace the timing belt and tensioner at the same time. The timing belt, scheduled by Audi for replacement at 105K miles, has a history of failing considerably sooner, so consider timing belt [...]

By | July 21st, 2011|Case Studies|Comments Off on Audi TT Quattro 1.8 Turbo – Defective Water Pump

BMW 525 – Defective Heat Exchanger (Heater Core) in Dash

This car has was diagnosed with a defective heat exchanger, also know as a heater core. The heater core as used in this BMW's climate control has hot engine coolant flowing through it during operation. The heater core, which is comprised of a an aluminum core and nylon tank ends had developed at leak at the interface. This area is often sealed with rubber o-ring which fails after long term exposure to heat and coolant. Once the o-ring seal fails, coolant will begin to seep out of the heater core into the heater box producing a strong burning smell from [...]

By | July 16th, 2011|Case Studies|Comments Off on BMW 525 – Defective Heat Exchanger (Heater Core) in Dash