Go Back   Volvo Forums - Volvo Enthusiasts Forum > Volvo Vehicles > Volvo XC70
Sign in using an external account
Register Forgot Password?
Search

Welcome to Volvo Forums!
Welcome to Volvo Forums,

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to start new topics, reply to conversations, privately message other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join Volvo Forums today!


Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 10-14-2009, 07:02 AM
Junior Member
 
Join Date: Oct 2009
Posts: 5
Default Coolant loss - no leak

I have the 2002 XC70. Its leaking coolant (about 750 ml every 100 km), but there is no sign of a leak. The engine oil looks ok (not milky). There is no dampness under the carpets. Also when the engine gets warm the idle feels a little lumpy. The temperature gauge is normal, eeven when the coolant is low.

The other thing I noticed when I opened the hood was that the termostat (I think) kept on clicking on and off.

I had it in the shop and they cant find anything - but clearly there is a problem using som much coolant.

Any diagnosis? solutions?
Reply With Quote
  #2  
Old 10-14-2009, 08:09 AM
JPN's Avatar
JPN JPN is offline
Super Moderator
 
Join Date: Sep 2006
Location: IPS, MA
Posts: 5,390
Default

I can only assume the leak is very slow. I would first suspect the radiator itself. However, the best thing for you to do is to have the cooling system pressure-tested at a reputable garage. This should reveal possible leak.

I can also suggest.....

- White powderish residue all along the coolant-carrying lines, especially the connections/seams.
- The reservoir cap.
- Water pump, which I assume is hidden by the timing belt cover.

I am not privy to the XC70s, so I'm moving this to the XC70 forum.


JPN
__________________
1994 854 Turbo T5, AW50-42LE
B5234T OBD-II Compatible

2004 Honda TL-UA6 3.2-V6 J32A VTEC 6-SPD

FAA-Airframe & Powerplant Ratings
FCC-General Radiotelephone Operator
Technical Writer (English-Japanese)
HAZMAT Specialist, Master Rating
Category-1 Occupational Health Coordinator
Reply With Quote
  #3  
Old 10-14-2009, 08:35 AM
Psaboic's Avatar
Super Moderator
 
Join Date: Jan 2006
Location: SW, WA
Posts: 1,884
Default

An old timers trick is to also place a big sheet of cardboard under the car when you put it away for the evening. In the morning you will be able to see if it is a static leak (i.e still leaks when the car is NOT running) and also it will give you a clue as to where it might be leaking from. I would also pull out the coolant reservoir bottle and see if it is leaking from the bottom of it
__________________
2013 Passat TDI SE 26K (hers)
2002 VW Jetta TDI 160K (mine)
1995 Volvo 850 Turbo 246K (kids)
1983 Mercedes 300D 275K (diesel commuter)
1965 Corvair Corsa 98K (fun car)
Reply With Quote
  #4  
Old 10-14-2009, 08:38 PM
tech's Avatar
Administrator
 
Join Date: Sep 2004
Location: Orlando, Florida
Posts: 36,443
Default

Another possibility is that the cooler in the radiator for the transmission has a small leak and coolant is getting into the tranny fluid.
__________________
1987 Ford mustang LX Coupe 5.0
1995 Yellow T5-RM running
1996 850 turbo
1994 N/A 5-speed wagon Purple (daughters)
Reply With Quote
  #5  
Old 10-15-2009, 04:56 AM
Junior Member
 
Join Date: Oct 2009
Posts: 5
Default Coolant leaking

I had a pressure test done, and the cooling system appears to hold pressure. I will try the cardboard under car trick to see if there is a static leak. However, I suspect that the leakage happens when the engine is hot.

I have noticed that the gear changes have started snatching a bit. Would this happen if coolant was leaking into the tranny?

Does the fact that the engine idle is uneven when hot provide any clues as to where the coolant may be going?

As I noted the oil looks fine, and the exhaust emission doesn't seem out of the ordninary.

Many thanks for the feedback, I feel like I may be making some progress at last!
Reply With Quote
  #6  
Old 10-15-2009, 07:22 PM
tech's Avatar
Administrator
 
Join Date: Sep 2004
Location: Orlando, Florida
Posts: 36,443
Default

The idle does not lead to anything. Sorry

How does the tranny fluid look?
__________________
1987 Ford mustang LX Coupe 5.0
1995 Yellow T5-RM running
1996 850 turbo
1994 N/A 5-speed wagon Purple (daughters)
Reply With Quote
  #7  
Old 10-16-2009, 07:02 PM
Psaboic's Avatar
Super Moderator
 
Join Date: Jan 2006
Location: SW, WA
Posts: 1,884
Default

Tech has a point, Check the tranny fluid. It should be a semi-bright red (if new) of reddish brown if it has a lot of miles on it. ALso it should not smell burnt
__________________
2013 Passat TDI SE 26K (hers)
2002 VW Jetta TDI 160K (mine)
1995 Volvo 850 Turbo 246K (kids)
1983 Mercedes 300D 275K (diesel commuter)
1965 Corvair Corsa 98K (fun car)
Reply With Quote
  #8  
Old 10-29-2009, 04:02 AM
Junior Member
 
Join Date: Oct 2009
Posts: 5
Default

I got the test done to see is engine gasses were getting into the coolant. This was positive (liquid cahnged colour). Seems it was a blown head gasket - between cylinders 3 and 4.

However, I am wondering what caused the gasket to blow. The car has never overheated, and it has never been driven hard. Is it possible that there is an underlying cause for the gasket to blow?

I near changes have been a bit jerky and it seems to ****** a bit. Could that be related, or is my car just getting old?
Reply With Quote
  #9  
Old 10-25-2010, 09:02 PM
Junior Member
 
Join Date: Oct 2010
Posts: 1
Default

Are you having transmission problems, too?
I was just reading about how there is a problem with the coolant leaking into the transmission on this particular car. It's a design problem. Something to look into anyway. Good luck!
Reply With Quote
Old 10-25-2010, 09:02 PM
 
 
 
Reply

Tags
09, c70, coolant, leak, leaking, loss, problems, radiator, s60, slow, tdi, turbo, v70, volvo, xc70


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 On
Pingbacks are On
Refbacks are On


Advertising
Featured Sponsors
Vendor Directory
Our Sponsors

All times are GMT -5. The time now is 01:55 PM.
© Internet Brands, Inc.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO ©2010, Crawlability, Inc.

This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.
Secure Backup