Good morning: My bmw have 70000 miles, and is in good shape, but this mornig I start the engine, and a noise came from the botton rigth side of the car, like a "track!track!track, several times. 15 seconds later the noise disapear....and later on the road when I stop at a red ligth the noise return for few seconds. Do you have any idea? The A.C. is working, and everything look normal!!
One of two things I think, if you are using low octane "Regular" gas in this can and it says it requires premium, the car could be retarding the timing which could cause a knock on idle.
you could also check the compression for a loose valve that could be causing the knock, otherwise you might have a bent rod, which it sounds like you might. The kock will get progressively worse until you fry your engine and have to buy a new one. Good Luck. Talk to a mechanic.
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When was last "healthy tune up". Plugs,all filters including FUEL filter? I would start there to give you a good "ground zero" starting point. I suspect "tired" plugs, but do the full tune up.
When is really cold, and vehicles with non electrical power steering start for the first time after a good period of inactivity the power steering pump tents to wine, that is normal, some other cars or almost all the cars when they pass 100.000 miles develop a little metallic noise that goes away when the oil pump distributes and lubricates all moving parts inside the engine when the car starts first thing in the morning in a really cold morning.
at 150,000 miles pretty much everything could be worn out if it is all original, if the van is in really good shape no dents or bad dings paint good, interior is in really good shape and the van has been serviced on a regular basis then yes fix it, also this is a free wheeling engine so if the timing belt breaks there is no damage to the engine, if it ran good with no excess oil useage or engine noise fix it..
Your powered steering pump needs checking out as it sounds like a reco pump is needed and the rest of the steering needs a good check over ,but yes do check your fluid as if its low or empty then it can cost you more
It should be checked like the rest of the car every 3000 km same as Battery/Engine oil/Brake fluid/Tyres/ etc ...
If the temperature is normal, you have serviced it regularly, don't have any leaks and the radiator looks to be in good shape on the outside, I see no reason to be replacing it. I've had many radiators last well over 200k without problems. It's not a bad idea to replace old worn items but if you begin changing everything else on your vehicle that's old, where do you stop?
I will talk to a BMW mecaninc ,tomorrow.
Thanks!
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