When this part goes bad, you’ll typically get a “flare” in your alternator’s current output, causing all of your lights to brighten up considerably. While it’s nice to have really bright lights, it’s bad for your electrical system and overcharges your battery. The voltage regulator is a small electrical device screwed just under the black […]
Category: XJ6
Jaguar XJ6, Series III, 4.2 Liter No Start Problem
Jaguar XJ6, Series III, 4.2 Liter No Start Problem 1981 Jaguar Parts Technical Information November 2000 By: Mike D. McNally ([email protected]) I am not a Jaguar mechanic. I own two XJ6’s a black ’81, which I drive every day, and a black ’83 that I intend to restore. So, not being a comprehensive Jaguar mechanic, […]
Transmission Service, BW65/66
The Borg-Warner model 65/66 transmission was fitted to the 1980-1987 XJ6. In the U.S, this transmission has developed a reputation for unreliability and short life. Interestingly, in the U.K. this transmission has developed a reputation for dependability and long life. In the U.K., car owners are trained (practically from birth) to regularly service their cars, […]
Spring Safety Tips for Your XJ6 Jaguar
Safety Tips for Your XJ6 Jaguar: Checking Tires, Belts, and Hoses As spring arrives and you prepare to bring your Jaguar XJ6 out of storage, it’s essential to inspect key components to ensure your first drives of the season are smooth and trouble-free. Tires, belts, and hoses are particularly vulnerable to wear and aging, especially […]
Flaky Speedometer on XJ6 Jaguars
How to Fix a Flaky Speedometer on an XJ6 Jaguar: A DIY Guide A bouncing or intermittent speedometer on your Jaguar XJ6 can be frustrating, but the issue is often caused by a faulty connection or a failing transducer. The speedometer gets its signal from the transducer, which is located either on the tail of […]
How to Fix Inoperative Cruise Control on Series III XJ6 Jaguars
When troubleshooting an inoperative cruise control system in your Series III XJ6 Jaguar, there are a few common problem areas to inspect. Fortunately, these are typically easy and inexpensive to repair. If your cruise control isn’t working, here’s a checklist of items to investigate: 1. Rubber Bellows of the Vacuum Unit: Check if the rubber […]
Cleaning out the V12 air bleed screw on on XJ6 Jaguars
Cleaning the V12 Air Bleed Screw on Jaguar XJ6 Models: A DIY Guide If you’re the proud owner of a Jaguar XJ6 with the legendary V12 engine, you probably know that proper cooling system maintenance is critical to keep your cat running smoothly. One often-overlooked component is the air bleed tube assembly on top of […]
Preventing an early death on the 1990-94 XJ6 Jaguar hydraulic pump
The hydraulic system pump responsible for operating the rear brakes is powered by an expensive electric motor. This motor is prone to burnout if it runs continuously. A faulty accumulator ball, located under the hood (bonnet) on the left side near the windshield, can cause the motor to run excessively. The pump should operate for […]
Stakedown Kit Instructions for 1980-1987 XJ6 Jaguars
As an experienced Jaguar mechanic, I’m happy to share some knowledge about a common issue with the 1980-1987 XJ6 models: the tappet guides often come loose, making stakedown kits a popular and necessary upgrade. One of my customers recently reached out with questions about installing a stakedown kit, and he suggested I share my response […]
Bulb Failure Modules on the 1988-1994 XJ6
Bulb Failure Modules (BFMs) have a reputation of failure on XJ40s (XJ6), usually it’s one of a few simple things. 1: Make sure that every bulb works! The failure module is designed to alert you that a bulb is out, so check this first (easy stuff first). 2: Clean the bulb contacts in the sockets. […]
