740 2.0 engine problem: Low compression - Volvo Forums - Volvo Enthusiasts Forum


Reply
 
 
 
Thread Tools Search this Thread
  #1  
Old 11-10-2017, 09:04 AM
Junior Member
Thread Starter
 
Join Date: Nov 2017
Posts: 7
Unhappy 740 2.0 engine problem: Low compression

The engine is failing and has a lack of power. I just checked the compression and cylinder #2 has no compression...

I'm going to start to take the head off and lets hope it's just a valve problem.
Reply With Quote
  #2  
Old 11-11-2017, 07:31 AM
Junior Member
Thread Starter
 
Join Date: Nov 2017
Posts: 7
Default

Removing the head...
Attached Thumbnails
740 2.0 engine problem: Low compression-img1629-.jpg  
Reply With Quote
  #3  
Old 11-13-2017, 07:44 AM
Junior Member
Thread Starter
 
Join Date: Nov 2017
Posts: 7
Default

I found this photo online of a special tool to hold down the cam when removing/instaling.
I don't have one, so I guess I will just loosen each bolt slightly...


Reply With Quote
  #4  
Old 11-13-2017, 08:14 AM
Senior Member
 
Join Date: Jan 2011
Location: New York
Posts: 744
Default

With the cams out try a leak down test on the cyl with 0 compression. I also note it is the GLE twin cam so I would suspect maybe a bent valve unless there wasn't a valve adjustment and you burned an exhaust valve.
Reply With Quote
  #5  
Old 11-14-2017, 09:30 AM
Junior Member
Thread Starter
 
Join Date: Nov 2017
Posts: 7
Default

Thanks for the sugestion, I did try a leak down test and got blow out of the exhaust.
Reply With Quote
  #6  
Old 11-14-2017, 09:32 AM
Junior Member
Thread Starter
 
Join Date: Nov 2017
Posts: 7
Default

The end result is a broken exhaust valve.
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Low compression = bad exhaust valve? rainier34 Volvo S40 2 01-29-2008 06:50 PM
740 Low Power, Low Speed had VERY low Power. Knock Sensor? Coil? elderzap Volvo 240, 740 & 940 0 11-07-2007 05:58 PM
1998v70 low compression melymel Volvo V70 8 10-06-2007 09:53 AM
1998 v70 low compression melymel Volvo V70 2 10-05-2007 11:40 AM
low compression and some other minor issues bnuk013 Volvo V70 1 11-02-2006 11:12 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Advertising
Featured Sponsors
Vendor Directory

All times are GMT -5. The time now is 02:27 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.