Engine ticking on idle and light pedal/low rev

[Sephanite]

Engine is now ticking on idle and low revs. I service the car myself and have just done a full fluid change.

Does anyone have a list of what needs to be done for inspection 2?
Any idea how to fix the ticking or is it age?

car has done 90k km

 

[Curtis]

The engine shouldn't be ticking at that kind of mileage or kilometerage! It might be a vanos problem or a noisy hydraulic lifter. Normally a good engine flush and oil change with a top quality oil sorts out noisy lifter problems but it might take a while for the new oil to work its way into the lifters. Do you change the oil between services or leave it for the maximum term?

 

[Shipkiller]

Normally on a Z4, a Vanos problem does not manifest itself as ticking... but that could be a new symptom. :idunno: It is normally a gear groan or high oil flow noise.

Personally, I would stay away from a full engine flush. Way too radical for BMW's. Our engines stay very clean with regular oil changes. When I performed my Vano's O-ring replacement at 50K miles, (http://www.z4-forum.com/forum/viewtopic.php?f=2&t=3600&st=0&sk=t&sd=a&hilit=Vanos#p51017) the valve train was very clean and little to no varnish. That being said, Curtis might be correct and you might have a bit of dirt in a lifter that has not been flushed out.

One of the best ways to flush any crap internal to the engine is a product called AutoRX (http://www.auto-rx.com/index.html). It slowly dissolves the sludge and varnish that is then trapped in your oil filter. But using it with our synthetic oil takes longer.

Where does the ticking come from? What area of the engine?

 

[Sephanite]

The engine shouldn't be ticking at that kind of mileage or kilometerage! It might be a vanos problem or a noisy hydraulic lifter. Normally a good engine flush and oil change with a top quality oil sorts out noisy lifter problems but it might take a while for the new oil to work its way into the lifters. Do you change the oil between services or leave it for the maximum term?

oil is changed every 10k km with filter or 3mths whichever comes first. Last oil change was about 2k km ago so the oil should have run in

 

[Sephanite]

Normally on a Z4, a Vanos problem does not manifest itself as ticking... but that could be a new symptom. :idunno: It is normally a gear groan or high oil flow noise.

Personally, I would stay away from a full engine flush. Way too radical for BMW's. Our engines stay very clean with regular oil changes. When I performed my Vano's O-ring replacement at 50K miles, (http://www.z4-forum.com/forum/viewtopic.php?f=2&t=3600&st=0&sk=t&sd=a&hilit=Vanos#p51017) the valve train was very clean and little to no varnish. That being said, Curtis might be correct and you might have a bit of dirt in a lifter that has not been flushed out.

One of the best ways to flush any crap internal to the engine is a product called AutoRX (http://www.auto-rx.com/index.html). It slowly dissolves the sludge and varnish that is then trapped in your oil filter. But using it with our synthetic oil takes longer.

Where does the ticking come from? What area of the engine?

i will investigate where the ticking is coming from and get back to u. I first thought about the belt, but our engines are chain driven

 

[Shipkiller]

Actually there are two chains. On is the timing chain from the Crank to the CAM's and and the other is the Vano's synchronization timing chain.

You still could have a belt problem, or a belt pulley issue. I changed both my belts at 50K... and when I inspected my pulleys, the water pump pulley had some minor cracking, so I replaced the water pump and alternator pulleys with power pulleys from Turner. :evil: