My 1968 1.6 diesel automatic Karoq has developed an overheating issue. THe temp range goes off the clock after warming up when go over 1500 rpm or encounter up hill stretches,. Red warning alarms come up telling me to pull off the rd. Howver if I ignore this and manage the engine at 1500 rpm it quickly (immediately) reverts to normal temp. I have ascertained that it is not an oil or a coolant issue.

 

my local garage has run it through the computer and can find no reason. He is inclined to think it’s n issue with the electronic water pump that clicks in when the engine is up to operating temp. It is booked in for a potential new pump and timing belt next week. I am no so sure s the temp goes down far too quickly to indicate a pump problem!  I am hopeful it just  sensor problem , and it’s is accessible for replacement!!! Has anyone out there experienced similar issues and how were they overcome? I am not inclined to go to the expense of replacing the pump and associated work if it’s not necessary. Sound s though this could be expensive.

 

thanks for your interest

Sounds like pump to me 

3 hours ago, Halfpenny said:

My 1968 1.6 diesel automatic Karoq has developed an overheating issue. THe temp range goes off the clock after warming up when go over 1500 rpm or encounter up hill stretches,. Red warning alarms come up telling me to pull off the rd. Howver if I ignore this and manage the engine at 1500 rpm it quickly (immediately) reverts to normal temp. I have ascertained that it is not an oil or a coolant issue.

 

my local garage has run it through the computer and can find no reason. He is inclined to think it’s n issue with the electronic water pump that clicks in when the engine is up to operating temp. It is booked in for a potential new pump and timing belt next week. I am no so sure s the temp goes down far too quickly to indicate a pump problem!  I am hopeful it just  sensor problem , and it’s is accessible for replacement!!! Has anyone out there experienced similar issues and how were they overcome? I am not inclined to go to the expense of replacing the pump and associated work if it’s not necessary. Sound s though this could be expensive.

 

thanks for your interest

 

 

When did it have the cambelt/waterpump change done or as it not been done.

 

If it's on the original pump and 6 years old I'd put money on it being the pump.

I fitted a new belt and pump to a Q3 and it was fine around town then as soon as I went on the a roads it would overheat. Stripped down and found the new pump faulty.