JHZR2
Staff member
Hi,
my car, mentioned in another post (91 BMW 318i, 4cyl M42 engine) has noisy hydraulic tappets. This to me seesm like it would be due to reduced flow. Would a lower viscosity (say the 0w-40 discussed in the other post abouut my car) be better in keeping this from happening?
It seems they are noisy any time the car is idling, even when hot. Would this indicate dirty tappets, reducing flow?
I think the best bet would be to run autoRX to help clean them, then switch to the 0w-40 for a quick 3mo/3000mi interval, then, assuming no usage, use it permanently, otherwise use either a mix of it and 15w-50 or something else (maybe delvac 1?)
Any comments on this idea? I hate the noisy tappets. I have heard that noisy tappets are happy tappets, but Im not happy when the car practically sounds like a diesel because of the tapping noise.
Thanks,
JMH
my car, mentioned in another post (91 BMW 318i, 4cyl M42 engine) has noisy hydraulic tappets. This to me seesm like it would be due to reduced flow. Would a lower viscosity (say the 0w-40 discussed in the other post abouut my car) be better in keeping this from happening?
It seems they are noisy any time the car is idling, even when hot. Would this indicate dirty tappets, reducing flow?
I think the best bet would be to run autoRX to help clean them, then switch to the 0w-40 for a quick 3mo/3000mi interval, then, assuming no usage, use it permanently, otherwise use either a mix of it and 15w-50 or something else (maybe delvac 1?)
Any comments on this idea? I hate the noisy tappets. I have heard that noisy tappets are happy tappets, but Im not happy when the car practically sounds like a diesel because of the tapping noise.
Thanks,
JMH