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Old 07-03-2011, 05:51 AM   #1
jimmy325i
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gurgling and tapping noise from engine

Had a little issue for some time on my car, which has now started to annoy me.
At idle after the car has warmed up, I get a gurrgling tapping noise coming from the right side of the engine. The right side of the engine would be the side where the exhaust manifold is. The noise gets louder with slight revs but then disappears as the revs go past about 1000 rpm. Now the obvious culprit is the hydro lifters but I want to be sure if they are. So how can I be? And what others possible causes could there be for this noise?

Also I woulod like to ask what causes the hydro lifters to wear? In specific, does low oil cause this? The owner before me was a women and i don't thik she got round to topping the oil until the red warning light would come on. And given the fact that these cars are oil thirsty: that would of have happened pretty often.
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Old 07-03-2011, 08:20 AM   #2
dmax
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What oil are you using?

Gurgling sounds like you might be describing something other than what's going on on that side.

Try using my favorite tool...a 5' hose about 1" in diameter (do I have to keep mentioning this?!).

Gurgling sounds like something fluid...as in coolant not at the right level, or maybe even an air leak...perhaps something caused by a failing/failed pulley.

Start by going through the basic maintenance your car would need at its mileage...whatever that is. Plugs, filters, check all fluids, look for leaks and repair those that are necessary. Check ofhg/vanos oil line, ccv, vcg (hmmm? That might gurgle?)...do you see any brown burned oil on the exhaust manifold heat shield...the aluminum strips, 2" wide, running along the rt. side of engine to back? If there's evidence of burned oil there, run your finger under engine cover to see if there's oil there. Also, study up on vanos...some cars have vanos that seem subject to rattling (which might be your tapping noise...though not quite where you describe it as being...again...the hose!)

HTH
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Old 07-03-2011, 11:20 AM   #3
jimmy325i
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Right its none of the above. Checked all those. And just cj=hanged the coolant. Although I do suspect the belt tensioner or steering pump. But I do not know how to definatively diagnose the tensioner. The gurgling noise is consistent with the tapping noise. Does anyone know if disconnecting the electrical loom to the steering pump will cause damage to any component? I wanna disconnect and maybe drive for a couple of miles to rule out the steering pump and look towards the tensioner.
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