Volvo Community Forum. The Forums of the Volvo Owners Club

Forum Rules Volvo Owners Club About VOC Volvo Gallery Links Volvo History Volvo Press
Go Back   Volvo Owners Club Forum > "Technical Topics" > Diesel Engines

Notices

Diesel Engines A forum dedicated to diesel engines fitted to Volvo cars. See the first post in this forum for a list of the diesel engines.

Information
  • VOC Members: There is no login facility using your VOC membership number or the details from page 3 of the club magazine. You need to register in the normal way
  • AOL Customers: Make sure you check the 'Remember me' check box otherwise the AOL system may log you out during the session. This is a known issue with AOL.
  • AOL, Yahoo and Plus.net users. Forum owners such as us are finding that AOL, Yahoo and Plus.net are blocking a lot of email generated from forums. This may mean your registration activation and other emails will not get to you, or they may appear in your spam mailbox

Thread Informations

2.4 D5 Thumping noise

Views : 14196

Replies : 49

Users Viewing This Thread :  

Reply
 
Thread Tools Display Modes
Old Feb 12th, 2021, 19:35   #1
YorkshireDave
VOC Member
 

Last Online: Mar 5th, 2024 09:42
Join Date: May 2015
Location: Wetherby
Default 2.4 D5 Thumping noise

Bought an XC90 last week. Super body work and internally. However ...

Discovered a real problem. The engine has (what I call) a 'thump' where I can feel a pulse of air in the intercooler plenum. It just sounds bl00dy awful and decidedly not good at all!

The previous owner has replaced the pneumatic engine mounts and I've done the vacuum test and it makes no difference whatsoever.
There has been an injector replaced too.

I took it to a great Volvo guy in Skipton today and they have no idea either but have advised me not to run it as it really sounds that bad. I recorded it today but can't see a way of posting a sound file.

I wondered if it might be an inlet valve letting by? But then I would have thought I'd hear some kind of 'misfire' kind of much as you get when an injector seal fails!

I know it's a real long shot, but does anyone have any ideas?

The zip file here is an MP3 of the noise.

PRETTY PLEASE!

D5 XC90 KNOCK-THUMP.zip
__________________
2006 Black XC90 D5 185 Auto Engine change at 162K.

all cars everywhere are a perpetual work in progress...

Last edited by YorkshireDave; Feb 12th, 2021 at 19:48. Reason: Added ZIP file of sound
YorkshireDave is offline   Reply With Quote
Old Feb 12th, 2021, 20:46   #2
5cilinder
Premier Member
 
5cilinder's Avatar
 

Last Online: Mar 26th, 2024 18:25
Join Date: Oct 2011
Location: Groningen
Default

You have worn soft valve lifters 0w30 oil with fuel its a known problem
You get escaping exhaust pressure in your inlet that way ,hence the noise

Last edited by 5cilinder; Feb 12th, 2021 at 20:49.
5cilinder is offline   Reply With Quote
The Following User Says Thank You to 5cilinder For This Useful Post:
Old Feb 12th, 2021, 20:54   #3
YorkshireDave
VOC Member
 

Last Online: Mar 5th, 2024 09:42
Join Date: May 2015
Location: Wetherby
Default

Quote:
Originally Posted by 5cilinder View Post
You have worn soft valve lifters 0w30 oil with fuel its a known problem
You get escaping exhaust pressure in your inlet that way ,hence the noise
Can you explain a bit more pls? What's the resolution?
__________________
2006 Black XC90 D5 185 Auto Engine change at 162K.

all cars everywhere are a perpetual work in progress...
YorkshireDave is offline   Reply With Quote
Old Feb 12th, 2021, 21:13   #4
5cilinder
Premier Member
 
5cilinder's Avatar
 

Last Online: Mar 26th, 2024 18:25
Join Date: Oct 2011
Location: Groningen
Default

Replacing your valvelifters and if you want to prevent it the next 100000 miles using thicker oil like 5w40 an changing it every 10000 miles.

How did you not notice it buying the car?

Last edited by 5cilinder; Feb 12th, 2021 at 21:17.
5cilinder is offline   Reply With Quote
Old Feb 12th, 2021, 21:54   #5
YorkshireDave
VOC Member
 

Last Online: Mar 5th, 2024 09:42
Join Date: May 2015
Location: Wetherby
Default

Quote:
Originally Posted by 5cilinder View Post
How did you not notice it buying the car?
Truth is I just don't know Taking your eye off the ball somewhat through buying during lock down I guess ;-( Just extremely embarrassed and also annoyed that it was sold with such ...

Is there a kind of write up anywhere? I've not heard of it before and would be keen to understand exactly what the symptoms are before diving in. I suppose I should not drive it till its fixed?

Anything else I need to do whilst in there?
__________________
2006 Black XC90 D5 185 Auto Engine change at 162K.

all cars everywhere are a perpetual work in progress...
YorkshireDave is offline   Reply With Quote
Old Feb 12th, 2021, 21:58   #6
5cilinder
Premier Member
 
5cilinder's Avatar
 

Last Online: Mar 26th, 2024 18:25
Join Date: Oct 2011
Location: Groningen
Default

It harms nothing, only the sound.
It is known in this forum as the "tugboat sound"
Just to be clear you have the euro4 dpf engine?

To replace the lifters the injectors need to be removed and the the camshafts needs to be removed, than the lifters and the camrollers (much cheaper now than 10 years ago)
I did this myself 10 years ago

Last edited by 5cilinder; Feb 12th, 2021 at 22:05.
5cilinder is offline   Reply With Quote
The Following User Says Thank You to 5cilinder For This Useful Post:
Old Feb 12th, 2021, 22:11   #7
YorkshireDave
VOC Member
 

Last Online: Mar 5th, 2024 09:42
Join Date: May 2015
Location: Wetherby
Default

Quote:
Originally Posted by 5cilinder View Post
It harms nothing, only the sound.
It is known in this forum as the "tugboat sound"
Just to be clear you have the euro4 dpf engine?

To replace the lifters the injectors need to be removed and the the camshafts needs to be removed, than the lifters and the camrollers (much cheaper now than 10 years ago)
I did this myself 10 years ago
Most def the tugboat sound. Yes euro 4 dpf. Sounds like a fun job
__________________
2006 Black XC90 D5 185 Auto Engine change at 162K.

all cars everywhere are a perpetual work in progress...
YorkshireDave is offline   Reply With Quote
Old Feb 12th, 2021, 22:16   #8
5cilinder
Premier Member
 
5cilinder's Avatar
 

Last Online: Mar 26th, 2024 18:25
Join Date: Oct 2011
Location: Groningen
Default

The reason it happens to the dpf engines is the thinner 0w30 oil in combination with the fuel dillution and the 30000km oil change interval.
Wich wears the lifters.
The previous euro3 engines dont have this problem due to the thicker oil with more zinc dopes and no fueldillution.
The job took me 10 hours, but i did it easy going , you need to be precise with torque up bolts on the camshaft bearings

Last edited by 5cilinder; Feb 12th, 2021 at 22:18.
5cilinder is offline   Reply With Quote
The Following User Says Thank You to 5cilinder For This Useful Post:
Old Feb 12th, 2021, 22:25   #9
5cilinder
Premier Member
 
5cilinder's Avatar
 

Last Online: Mar 26th, 2024 18:25
Join Date: Oct 2011
Location: Groningen
Default

The camshafts had no wear marks btw
5cilinder is offline   Reply With Quote
The Following 2 Users Say Thank You to 5cilinder For This Useful Post:
Old Feb 12th, 2021, 23:22   #10
YorkshireDave
VOC Member
 

Last Online: Mar 5th, 2024 09:42
Join Date: May 2015
Location: Wetherby
Default

Quote:
Originally Posted by 5cilinder View Post
The camshafts had no wear marks btw
Did it completely & utterly cure the tugboat sound tho?
How was fuel economy & performance afterwards?
__________________
2006 Black XC90 D5 185 Auto Engine change at 162K.

all cars everywhere are a perpetual work in progress...
YorkshireDave is offline   Reply With Quote
Reply


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

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 18:40.


Powered by vBulletin
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.