How to Prevent Camshaft Failure for your BMW 535is
The BMW 535is cars were built from 1985 up to 1988. Over-all it had good reviews. It was well-built and very reliable. Also, it was very durable and was equipped with a powerful engine that performed quite well. However, just like the other cars, there are some factors that affect its performance. One of them is camshaft failure.
Your BMW 535is is equipped with a camshaft. It plays a very important role in the engine as it is the one responsible for controlling the opening and closing of the intake and the exhaust valves in the cylinder head. Not only does it open and close the valves to let air in and out, it also determines when and for how long the valves will remain open. Because the camshaft is a crucial part in the engine operation, it should always be in excellent condition. However, you can't escape the fact that it will fail eventually, so it is better to be prepared. Here are tips to help you in preventing your BMW 535is's camshaft from failing.
- Use the right break-in lubricant.
If you have just installed a new camshaft make sure that you apply only the moly paste that came with your camshaft if it is a flat-tappet kind. If you have a roller tappet camshaft, it will only require normal engine oil to lubricate the lifters and the cam. Moly paste should also be applied on the distributor gears on the cam and the distributor regardless of the kind of camshaft you have. You can opt to use an anti-wear additive for added protection. Don't forget to use non-synthetic oil during the break-in period. The composition of synthetic oil can contribute to the early demise of the cam.
- Don't use a high volume or high pressure oil pump.
High volume or high pressure oil pumps are the main cause of the premature wearing out of the distributor gears and the cam, especially for low speed running in street type applications. If you have this kind of oil pump in your car, you can opt to replace them. However, if you need this kind for your car, you should try increasing more oil flow over the gear area to help cooling off the point of contact. This can help increase the service life of the gears and the cam. Also, you should make sure that you maintain a maximum of .010 inches of end play if you have adjusted the end play of your distributors. This will help in preventing the premature wearing out of the distributors and then the camshaft.
- Make sure that there's no mechanical interference that will prevent the cam from turning freely.
Spring coil bind, valve-to-piston interference, retainer-to-seal interference, and rocker-arm-to-stud interference are some factors that can cause the premature failing or wearing out of the camshaft. These mechanical interferences can cause the camshaft to stop rotating. To avoid these from happening, they should have enough clearance from each other.