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Original BMW SportLight Steering
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By Counterman
Rack-and-pinion steering is the predominant type of steering system on vehicles today.
Simplicity is one of the reasons for their popularity. On these systems, an inner and outer tie-rod end on each side connects the steering rack to the steering knuckle. The inner tie-rod ends tend to last longer than the outers because they have a smaller range of motion, and they simply don’t get the same abuse as the outers on these systems.
Throughout the life of a vehicle with rack-and-pinion steering, it’s not uncommon to replace outer tie-rod ends multiple times, and rarely or never replace the inners – as long as the boot (also known as bellows) that protects them from dirt and moisture isn’t damaged.
Before rack-and-pinion steering became popular, a parallelogram steering linkage was the predominant setup on most cars and trucks, consisting of a pitman arm, idler arm, center link and inner and outer tie-rod ends on each side. The tie rods are connected by a tie-rod sleeve. Even after rack-and-pinion systems became popular and virtually standard on all cars, parallelogram steering remained in use on trucks, vans and heavy-duty vehicles for many years, but today rack-and-pinion is becoming more common on them too.
There’s another type of steering system you may run across, also common on some trucks and heavy-duty vehicles, and it consists of a drag link and tie rods. The difference is there’s no idler arm. A drag link goes from the pitman arm to a tie rod that connects to the steering knuckle, and second tie rod runs from the first to the other steering knuckle.
Terminology can vary, but don’t let that throw you. In this illustration, No. 4 is the drag link, No. 2 and No. 1 are tie rods. Some people may refer to the drag link as an inner and outer tie rod. Also note No. 6, a steering damper, is a common feature on heavy-duty vehicles.
When selling steering components, it can be useful to look at a diagram, in case your customer is unsure of the name of the component they need. You also can use it as an aid in pointing out additional items they may need.
The Quality Question
It’s not uncommon to be asked about quality, especially with the different lines and varying cost of the steering components you sell. The “economy” or “value” line is designed to make it affordable to repair a vehicle. There’s nothing wrong with these components. I’ve used them many times, and they’re as safe as any other. Will they last as long? Most likely not, but many people choose to go this way because it’s simply all they can afford, and we all can respect that.
On heavy-duty or vehicles that the owner plans to keep long-term, it’s best to recommend a higher-end line of components. They’ll last longer, and you also can remind your customer that every time you replace a steering component, an alignment must be performed. That’s an additional cost, and worn components also will cause abnormal tire wear. A less expensive component that doesn’t last as long actually might cost more in the long run.
Where’s the Grease Fitting?
Fewer steering components come with grease fittings than in the past. Many people perceive this as a sign of “cheap” or low quality. This is far from the case. Many high-quality steering components today are constructed with better materials and higher-quality lubricants. Lack of a grease fitting doesn’t mean low quality. But it does mean there’s no way a poor-quality lubricant can be added to the joint, it can’t be over-greased, and there’s no way for moisture or contaminants to find their way in either.
Here’s the kicker: Is your customer going to personally grease the fittings themselves? As a professional technician, if I had a nickel for every greaseable joint I’ve seen that was completely worn out, with not even a remote sign of grease ever having touched the zerk fitting … you know the rest. This is reality. Blame it on whomever. If the greaseable joints aren’t going to be greased, I’d rather have those not designed for it.
Extras
There are a few good suggestions to keep in mind when selling steering components. If it’s a rack-and-pinion vehicle, rack boots are a good suggestion since the outer tie-rod ends must be removed to replace them. On parallelogram steering, when tie rods are replaced, tie-rod adjusting sleeves are a huge benefit. These are almost always rusted in place and difficult to loosen and turn. New sleeves make the installation much quicker, as well as the alignment. If the vehicle has a steering damper, it’s always a great recommendation. These tend to get ignored, but are commonly worn out. And finally, don’t forget grease for the grease gun, and shop rags to clean up the mess.
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By Buy Auto Spare Part
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By Buy Auto Spare Part
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By Counterman
MEYLE is expanding its product range to include the two-component brake discs for common BMW and Mercedes models.
The new brake discs “offer customers the usual OE qualities such as accurate fit, low offset, reduced weight and the associated fuel savings and decrease in CO2. At the same time, the new brake discs boast high performance, driving comfort and sophisticated design, as is typical of the MEYLE PD line,” the company said.
Thanks to its new products, MEYLE is expanding into the aftermarket for brakes with solutions in areas previously reserved for vehicle manufacturers with their original parts. Seven new references for
link hidden, please login to view are available for the BMW models 3 to 8 Series X3 to X5 and Z4; and for Mercedes C-Class and E-Class models. The brake discs feature an aluminum or stamped-steel hat riveted to the cast-iron friction ring.
Due to the high-quality surface coating, the ECE-R90-certified brake discs do not require degreasing, thus ensuring long-lasting protection against corrosion, according to MEYLE.
A higher percentage of carbon makes the two-component brake discs exceptionally resistant to heat distortion even in cases of higher thermal stress – for example, on steep mountain descents – for extended driving comfort without vibrations, according to the company. To ensure efficient installation at the workshop, 99% of the brake discs are equipped with a fixing screw.
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By Mypafway
Hi there,
A client of mine is looking for a decklid and doors for a 1999 BMW e330. Your help would be greatly appreciated.
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