IPD sale XeMODeX - Experts in Volvo Electronics Free shipping all USA - Experts in Brakes
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy your stuff using this and it helps MVS!

'06 XC70 compression issue

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
2004 - 2007 V70 R
2001 - 2007 XC-70
2001 - 2009 S60
2003 - 2007 S60 R

User avatar
jimpierce7
Posts: 57
Joined: Wed Sep 14, 2016 6:55 pm
Year and Model: 2006 XC70
Location: Burlingame California
Has thanked: 0
Been thanked: 0
United States of America
jimpierce7

'06 XC70 compression issue

Post by jimpierce7 » Thu Jan 30, 2020 5:20 pm

Interested in your insight as to what the most likely problem is? Other than the MAF of course. Which I seem to consistently continue to purchase bad ones. I went ahead and paid for a big diagnostic. Mechanic swapped out my new Bosch MAF with an old, known, good one and it seems to have solved the problem I was looking to fix. I'm glad I went down the road I did as it turns out I have low compression on two cylinders.
From his diagnostic
Compression test Cylinde #1 160, #2 170 #3 160, #4 95 #5 75

Ideas of most likely cause?

User avatar
RickHaleParker
Posts: 3637
Joined: Mon May 25, 2015 2:30 pm
Year and Model: See Signature below.
Location: Kansas
Has thanked: 3 times
Been thanked: 448 times
United States of America
RickHaleParker

Re: '06 XC70 compression issue

Post by RickHaleParker » Thu Jan 30, 2020 6:30 pm

Most likely is: Head Gasket between cylinders #4 & #5 has failed.

Do a wet compression test and post the numbers.
Platform: P80 1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0,
Plant Torslanda Sweden.
----------------------------------------------------------------
1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

User avatar
jimpierce7
Posts: 57
Joined: Wed Sep 14, 2016 6:55 pm
Year and Model: 2006 XC70
Location: Burlingame California
Has thanked: 0
Been thanked: 0
United States of America
jimpierce7

Re: '06 XC70 compression issue

Post by jimpierce7 » Thu Jan 30, 2020 10:13 pm

RickHaleParker wrote:
Thu Jan 30, 2020 6:30 pm
Most likely is: Head Gasket between cylinders #4 & #5 has failed.

Do a wet compression test and post the numbers.


That's what I've been thinking.

User avatar
jimpierce7
Posts: 57
Joined: Wed Sep 14, 2016 6:55 pm
Year and Model: 2006 XC70
Location: Burlingame California
Has thanked: 0
Been thanked: 0
United States of America
jimpierce7

Re: '06 XC70 compression issue

Post by jimpierce7 » Fri Jan 31, 2020 6:24 pm

No difference with the wet test. So, head gasket or valves. Periodic noise (if you listen for it) and oil consumption makes me think valves.

Post Reply
  • Similar Topics
    Replies
    Views
    Last post