Question about Volkswagen Golf
Low coolant level, failed thermostat, blocked radiator core or failed pump are all possible causes. Check them in the order given in the list as they become more complex and expensive to fix. Coolant level is easy enough to check, if low just top up at the reservoir. Whilst doing this check that the relief valve in the cap is OK and that the filler cap sits tightly when screwed down. For the thermostat drain the coolant (should be a bled valve for this purpose towards bottom of radiator) into a bucket and remove the 'stat housing and put the 'stat in a pan of simmering water. The 'stat plate should open up about 5mm. Take the pan from the heat and add cold water and the 'stat should close after about a quarter volume of cold water has been added. If the 'stat fails to open or close then replace it. Whilst the system is drained of coolant remove the top and bottom rubber hoses from the radiator. With a hose flush water into the top radiator opening and check if water exits freely from the bottom of the radiator. If there is a sign of blockage put the hose in the bottom opening and put the water on full pressure to back flush the radiator. Keep doing this until the water is clear. If everything up until now has been fine the last thing to look at is the water pump, either the pump has seized or there is a fault with impeller. When refilling the coolant system after any repair make sure that the interior heater is on maximum. When warming the engine up keep the heat on maximum and this will help displace air trapped in the system. Whilst warming up squeeze the radiator hoses regularly again to keep bubbles moving towards the reservoir filler. Keep the reservoir topped up as air bubbles work their way out. Only when the engine is nearly at running temperature tighten the filler cap. After having driven the car, let it cool off and check the coolant level, again top up as necessary.
Posted on May 26, 2011
May be a silly question but have you checked the radiator has water in it? Alex
Posted on May 26, 2011
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
Tips for a great answer:
Jun 21, 2011 | 1999 Volkswagen GTI
Mar 12, 2011 | 2000 Volkswagen Golf
Sep 15, 2010 | Volkswagen GTI Cars & Trucks
Apr 16, 2010 | 2003 Volkswagen GTI
Nov 16, 2017 | 2002 Volkswagen Golf
Sep 06, 2009 | 1999 Volkswagen Golf
Apr 10, 2009 | 1999 Volkswagen Golf
Mar 13, 2009 | 1999 Ford Windstar
Jun 23, 2008 | 2001 Volkswagen GTI
390 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: