Ears of a Hawk wrote:

Can any Defender owners with high mileage help me out. I took off the Exhaust manifold heat shield and inspected for warped manifold. No visible signs. It didn't show up anything using soapy water spray.
Link up my new nanocom and checked Turbo pressure. This shows that the turbo pressure gets up to a maximum of 0.15 bar at over 2500rpm - it doesn't have enough to actuate the wastegate. Is there anyone out there who has had an issue like this - perhaps turbo related. Any additional tests I could perform before tearing down the Turbo. thanks

Hi EoaH. When you did your boost check with the Nanocom did you do it by just revving the engine at standstill? If so that would explain the low boost pressure. Testing boost should be done in vehicle, choose a nice long hill and starting in 3rd accelerate up it, same in 4th and see what the nanocom records. Best done with an engine up to temperature.

As for checking your exhaust manifold, usually there are tell tale signs of soot emanating from the mating surface where the system is not sealed anymore. It will look like this;


Click image to enlarge

You many also hear a rasping noise at certain speeds as the exhaust gasses vibrate the manifold gasket.