VW Passat Heater Core Replacement – Clogged Core – Low Heat

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 to air that is forced past them, by a fan, thereby heating the passenger compartment. The heater core is made up of small piping that has numerous bends.Clogging of the piping may occur if the coolant system is not flushed or if the coolant is not changed regularly. If clogging occurs the heater core will not work [...]

By | August 16th, 2011|Case Studies|Comments Off on VW Passat Heater Core Replacement – Clogged Core – Low Heat

Jaguar XJS V12 – Multiple Oil Leaks

Curious about what is really under the hood of the Jaguar XJS? To begin with, 12 cylinders, leave it to the Brits to call them 1-6A and 1-6B rather than 1-12. You'll also find a whole lot of wiring, plumbing, vacuum switches and hoses. This "bad kitty" had a number of significant engine oil leaks, ran very poorly, and just needed general attention. One of my past techs reminded me of that "If they don't leak oil there's no oil in them." While that is close to the truth, some oil is almost normal for the older British cars, unfortunately [...]

By | August 15th, 2011|Case Studies|Comments Off on Jaguar XJS V12 – Multiple Oil Leaks

1998 Volvo V70 – Clogged Engine Breather/Multiple Oil Leaks

We've seen this before, this car presented with engine oil leaks from nearly every seal. Using our special Volvo diagnostic tool, it was easy to confirm a severely clogged engine breather box. Not an easy job, but one that needed to be handled. This was not a regular service customer car, we find this type of clogging on cars which have been subjected to "quick lube" oil changes, or maintenance has not been carried out according to the factory schedule. In the photos below, you'll note the heavily clogged ventilation ports, both in the black breather box, and in the [...]

By | August 14th, 2011|Case Studies|Comments Off on 1998 Volvo V70 – Clogged Engine Breather/Multiple Oil Leaks

2004 Audi A4 Quattro 3.0 – Clutch Failure

This nice Audi came in with the concern of a slipping clutch. In fact the clutch seems to have failed in a very catastrophic way, with severe damage to the flywheel and pressure plate. The damage is so extensive that it is hard to determine exactly what did cause the failure, but my suspicion is the clutch release bearing hung up on the guide tube, keeping the clutch partially depressed and allowing slippage. After extended slippage, the heat build was great enough to cause the clutch friction material to fail and break apart. I've seen this type of failure on [...]

By | August 13th, 2011|Case Studies|Comments Off on 2004 Audi A4 Quattro 3.0 – Clutch Failure

2001 Volvo XC70 – Turbocharger Lubrication Failure

Volvo turbos on the 2nd generation cars generally last the life of the engine, so it was unusual to see this car here with a defective turbocharger. Half the battle in repairing anything is to figure out WHY it failed, so a repeat failure can be avoided. You'll notice on the turbocharger below the impeller or fan which drives the unit is severely worn at the ends. This is caused by the turbo fan contacting the housing, usually because of wear in the turbo bushings or damage to the shaft. In this particular turbo the shaft is actually broken into [...]

By | August 12th, 2011|Case Studies|Comments Off on 2001 Volvo XC70 – Turbocharger Lubrication Failure

2006 Volvo XC70 – Handbrake Shoe Delamination Failure

Volvos are great cars, but like every car there are some special service points which require attention. All too often these items are overlooked by general repair shops, the old adage "Jack of all trades, master of none." applies here. One problem on the later Volvos is delaminating of the parking brake (handbrake) shoes. The friction material is glued, rather than riveted, onto the metal structure of the parking brake shoes. After time the adhesive holding the shoe onto the metal fails. This is often manifested by a "scrapping" or rubbing noise in the rear brake area. All too often [...]

By | August 11th, 2011|Case Studies|Comments Off on 2006 Volvo XC70 – Handbrake Shoe Delamination Failure

Mercedes CLK320 – Climate Control Link/Motor Defective

Hidden in the dash of that nice C-Class are a series of small plastic levers, which, given time and use, may fracture, resulting in an unusual noise from the dash area. The noise is noted as a "snapping" or "popping" sound in or near the center vents, and the customer may also have a concern about incorrect temp or air flow from the vents. The problem, a small plastic lever which operates the foot well flaps via a servo motor. In this car, we found both the broken link as well as a defective servo motor. The servo motor had [...]

By | August 10th, 2011|Case Studies|Comments Off on Mercedes CLK320 – Climate Control Link/Motor Defective

Audi Allroad – Water Leak – ABS/ESP Brake Module Damage

When this Audi was serviced, the previous service shop neglected to properly clean the water drains under the hood. On many of the Audis leaves and other debris will block the drains and allow water to build up and enter the interior of the car via the cabin air intake. Water build up will overflow and enter into this opening. In this case the electronic module which control ABS brakes and ESP - traction control, was damaged by the water entry into the car. We cleared the drains, replaced and coded the ESP module, and the car was fine. It [...]

By | August 9th, 2011|Case Studies|Comments Off on Audi Allroad – Water Leak – ABS/ESP Brake Module Damage

VW Passat – Engine Damage – Use Of Non-Synthetic Oil

You'll note the severe scoring and wear on the camshaft bearing caps on the Audi/VW 1.8 liter turbo engine. Audi and VW strongly recommend, and in some cases require the use of a full synthetic engine oil in their cars. No where is this more important than in the engine which use a turbocharger. Non-synthetic, or low quality engine oils will break down under the load, carbonize, and cause internal engine damage or turbocharger failure. This is why we always suggest the use of a full synthetic engine oil in model years 1999 or new. The oil does cost more, [...]

By | August 8th, 2011|Case Studies|Comments Off on VW Passat – Engine Damage – Use Of Non-Synthetic Oil

BMW 535 – Heater – A/C Blower Motor Replacement

Defective blower motor, can only be accessed by complete dash removal. We suggest replacement of both the blower motor and speed control unit while the dash is apart.

By | August 7th, 2011|Case Studies|Comments Off on BMW 535 – Heater – A/C Blower Motor Replacement