The TDV6 is an excellent engine that if serviced correctly, is extremely reliable, while producing excellent performance for both Jaguar and Land Rover. One area of that has come to our attention lately is the top coolant housing. Now the bad thing is, the housing is located underneath the throttle body assembly, which unfortunately makes it very hard to see and therefore easily missed by even the most observant technicians.
So what to look for you say??
Well first of all a torch and possibly a mirror will be necessary. Look for any signs of moisture around the base and rear of the assembly (there is an O ring at the back), then move on to the seam. 90% of the time it's the seam that will show your first signs of leaking.
The rule of thumb is, if there is any moisture or coolant residue, then you should replace it. Quite often you will only find dry coolant as it may only leak on very long runs which is generally the most inconvenient time possible.
If you drive a Jaguar or Land Rover with a TDV6 with over 100,000kms on it, it would be worth checking. Additionally, if you often go bush for long trips in your Land Rover, a bit of preventative maintenance may be in order.
Replacing the part is not an overly involved job, however since the throttle assembly will come off a good technician should also clean out your throttle body and MAP sensor. We will cover induction cleaning in another post!!
NOTE, if you order your brand new assembly, it will generally come with the two main coolant port seals, HOWEVER I am yet to receive one with the rear port O ring, so be sure to order one. You must replace this O ring when changing the assembly because chances are if you don't it will leak!!!
Should you have any questions about your coolant housing contact us at www.pickardsautomotive.com.au or (03) 9428 9655