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Discussion Starter · #1 ·
Hello! Yesterday a took for test drive 164 Q4. Could you tell me whether is it normal when the car works on idle after stopping to hear a strange sound from the differential, something like "thump-thump" ? Sound is weak for a moment and the car is moving and working properly. Could this be some verification of differential?

Regards,
Vasil

P.S. I post this question and hire: Alfa Romeo 164 Register.com • View topic - Question about Alfa 164 Q4

P.P.S. Sorry about my terrible english! I hope you understand what I ask
 

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Discussion Starter · #3 · (Edited)
Your English is fine and perfectly understandable. The problem is this car is so rare not many people have experience with them to answer your question. I have only seen a Q4 once and have never even had a ride in one. There are only about 5 of them in the US.
Yes, 164 - Q4 is rare. Only one in my country (Bulgaria) 164 Q4 produset 11.1994 , and I drive it now. The car was imported from Switzerland.

This sound is when the engine is idling and the sound disappear when the engine is turned off!
The sound is only for a moment "tup..tup" This is when waiting at traffic lights and engine running. The sound is weak. I checked the hidraulic liquid (it is new - replaced a week ago and the level is normal)
 

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Discussion Starter · #8 · (Edited)
Thanks ! Tomorrow I'll look at the car in the service of friends - alfisti. Then I'll decide whether to buy my fourth alfa romeo and only 164 Q4 in my country.
Today I signed up to participate in track days, but I might drive my 155 V6 or GTV
 

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Discussion Starter · #13 ·
In contrast to what previous posters are saying, the Q4 system actually does make some noises from time to time.


When listening carefully, you can hear the pressure relief valve opening a few seconds after start-up when the hydraulic system is pressurized up to ~ 85 bars.

As soon as the pressure is reached, a valve re-routes oil back to the oil reservoir instead of the hydraulic storage unit (mounted behind rear-bumper on right side).

This can be heard as a Clunk / Clinking sound.


Most important when looking at a Q4 is to see if the Q4 light on the dashboard and stays off during driving.

cheers
You're right. We check in service. The car drives perfectly. Boys from the service are alfisti - they have restored cars (Alfa Romeo) aged 30-40 years, but this 164 Q4 e only one in Bulgaria.
Otherwise, the lamp uses a verification of 4x4 comes on and off and the car drives perfectly. Problem is that the car is very low (sport springs) I'm looking for original (high) springs for Q4 (they are different from those of other 164)
The car is produced 11.1994 years. Have just replaced all belts, pulleys, t.n.t. Now is 242,000 km. (Engine is perfect) I can take it for 3200 euros.
 

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Discussion Starter · #20 ·
Thanks guys! Everything is fine for now. I will not buy a car, but will buy it my close Friend - ALFIST. Again, I can drive it from time to time. If I had bought this Q4, I had to sell one of my three cars now, and I love them all:)
 
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