D3 knocking under acceleration from low rev

nielsthorsen · Aug 4th, 2013, 22:02

Hi
My new (6000km) V60 d3 136 hp has a knocking sound when accerating slowly from low speed. It only occurs when motor is on operational temp. Runs smooth and nice in iddle and when pulling harder.
Is anyone having a similar experience or know what is the matter?

Best regards Niels

craigv60 · Aug 5th, 2013, 13:26

Hi, at what RPM and in which gear does it make the knocking sound?

nielsthorsen · Aug 5th, 2013, 14:43

Quote:

Originally Posted by craigv60

Hi, at what RPM and in which gear does it make the knocking sound?

At 1200 - 1500 rpm. I dosnt matter witch gear. The knocking is only made when giving a small amount of throtle. It happens for example when passing a roadbump. The speed is reduced and after the bump the speed is increased again. You hear the knocking when accelerating.

craigv60 · Aug 5th, 2013, 15:34

Interesting. Is the 'knocking' sound louder and easier to hear if you have the windows open? Or is it mainly coming through the car body?

The D3/D4 engine does make a slightly unusual 'throb' sound when accelerating from low rpm, but should not make a 'knocking' sound.

nielsthorsen · Aug 5th, 2013, 16:39

Quote:

Originally Posted by craigv60

Interesting. Is the 'knocking' sound louder and easier to hear if you have the windows open? Or is it mainly coming through the car body?

The D3/D4 engine does make a slightly unusual 'throb' sound when accelerating from low rpm, but should not make a 'knocking' sound.

It seems that is is mainly coming though the car body. To me it sounds like a valve or injector. The Sound is in sync with the rev. But from one cyl. Only. It is not there the first 15 min after start on cold motor.

craigv60 · Aug 5th, 2013, 17:14

I have the 'old' D3 (with 163bhp) and it has always made a slightly metallic knocking sound when accelerating quickly from low rpm (around 1,300 - 1,400).

However it only does this when the engine is cold, in the first 1 - 2km from starting. When fully warm, it does not make this sound.

Maybe the dealer could check for a software update?

nielsthorsen · Aug 5th, 2013, 19:22

Quote:

Originally Posted by craigv60

I have the 'old' D3 (with 163bhp) and it has always made a slightly metallic knocking sound when accelerating quickly from low rpm (around 1,300 - 1,400).

However it only does this when the engine is cold, in the first 1 - 2km from starting. When fully warm, it does not make this sound.

Maybe the dealer could check for a software update?

Yes maybe it is a software issue. Ill have the dealer to look into it. Tanks.

berner · Feb 10th, 2016, 12:03

Hi i have the same prb on my car and it only happens when the engine is cold. I have been at Volvo Dealer and they dont have a clue. Did you solve the prb?

cheshired5 · Feb 10th, 2016, 12:21

He hasn't been on here for over 2 years so we may never know.....

nielsthorsen · Feb 10th, 2016, 16:41

Unfortunately I have not solved the knocking problem. Is is still there on at hot motor but only in the sommertime.
Niels

Aug 4th, 2013, 22:02	#1
nielsthorsen New Member Last Online: Feb 10th, 2016 16:41 Join Date: Jul 2013 Location: Vordingborg	D3 knocking under acceleration from low rev Hi My new (6000km) V60 d3 136 hp has a knocking sound when accerating slowly from low speed. It only occurs when motor is on operational temp. Runs smooth and nice in iddle and when pulling harder. Is anyone having a similar experience or know what is the matter? Best regards Niels

Feb 10th, 2016, 12:21	#9
cheshired5 Premier Member Last Online: Dec 26th, 2021 13:42 Join Date: Dec 2013 Location: Crewe	He hasn't been on here for over 2 years so we may never know..... __________________ 2002 S60 SE D5 Manual 209000 miles

Feb 10th, 2016, 16:41	#10
nielsthorsen New Member Last Online: Feb 10th, 2016 16:41 Join Date: Jul 2013 Location: Vordingborg	Not solved Unfortunately I have not solved the knocking problem. Is is still there on at hot motor but only in the sommertime. Niels

Aug 5th, 2013, 13:26	#2
craigv60 Master Member Last Online: Dec 28th, 2022 17:28 Join Date: Jul 2011 Location: Macclesfield	Hi, at what RPM and in which gear does it make the knocking sound?

Aug 5th, 2013, 15:34	#4
craigv60 Master Member Last Online: Dec 28th, 2022 17:28 Join Date: Jul 2011 Location: Macclesfield	Interesting. Is the 'knocking' sound louder and easier to hear if you have the windows open? Or is it mainly coming through the car body? The D3/D4 engine does make a slightly unusual 'throb' sound when accelerating from low rpm, but should not make a 'knocking' sound.

Aug 5th, 2013, 17:14	#6
craigv60 Master Member Last Online: Dec 28th, 2022 17:28 Join Date: Jul 2011 Location: Macclesfield	I have the 'old' D3 (with 163bhp) and it has always made a slightly metallic knocking sound when accelerating quickly from low rpm (around 1,300 - 1,400). However it only does this when the engine is cold, in the first 1 - 2km from starting. When fully warm, it does not make this sound. Maybe the dealer could check for a software update?

Feb 10th, 2016, 12:03	#8
berner New Member Last Online: Feb 10th, 2016 12:03 Join Date: Feb 2016 Location: london	Hi i have the same prb on my car and it only happens when the engine is cold. I have been at Volvo Dealer and they dont have a clue. Did you solve the prb?

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)