Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 07-04-2015, 14:24   #1
Registered User

Join Date: Aug 2011
Location: Ely, Cambridgeshire, UK
Boat: Beneteau Oceanis 370
Posts: 2
Send a message via Skype™ to saileasy
Volvo 2003 - blockage in water jacket

An old topic I know but I have a problem with my Volvo Penta 2003 indirectly cooled engine. Towards the end of last year I attempted to change the coolant. On removing the drain plug I found that it was bone dry. Having read the considerable correspondence on the topic in Cruisers Forum I first checked that the space inside the drain plug was clear. (I can insert a flexible curtain rail a full 8 cm into the block)

Subsequently I have flushed the water jacket with both Rydlime and various other radiator flushing compounds without success. When I run the engine I am able to measure the temperature of the water jacket using an infra-red temperature sensor. The top of the block at different places varies from 68 deg C to 74 deg C (top of the thermostat housing). The bottom of the block around the area of the engine sump is about 78 deg C.

I am able to drain the coolant by disconnecting the pipe that goes from the internal water pump to the calorifier. The drained coolant is about 5 litres. The coolant is a light brown colour and contains particle of light brown sediment. These particles can be dissolved in a solution of oxalic acid so I presume that they are largely made of iron.

Based on this information I should like to know if it is safe to use the engine for extended periods (eg for at least 4 hours). Secondly is it possible to remove the blockage to the drain plug using either oxalic acid or some other acid? If so please advise on a suitable acid and recommend its concentration. Any other alternative suggestions would also be much appreciated.
saileasy is offline   Reply With Quote

volvo, water

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
fuel filter blockage at top bahmi Engines and Propulsion Systems 2 01-06-2014 19:50
1GM Yanmar Cooling water blockage: Lessons learned Andrew Troup Engines and Propulsion Systems 22 14-03-2014 01:04
System blockage shorebird Plumbing Systems and Fixtures 4 16-07-2012 22:53
Holding Tank Blockage Sacrebleu Product or Service Reviews & Evaluations 20 24-05-2012 08:24

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 16:14.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.