Thread: Hole in intercooler

Where is the hole ? In between the fins it wont have any affect, in a tube then you will be losing pressure.

Depends on the size of the hole. You should do a boost leak test to determine the severity.
Get it repaired / changed out when you can.

Hole is in the tube

Sent from my GT-I9300 using AULRO mobile app

When the intake system is under vacuum, you will be sucking in un-metered air into the engine. This can cause a 'lean' burn if serious enough.
Under boost, you will be losing pressure from the system, losing power, and depending on how the ECU/ECM manages fuelling, potential rich mixture.

Usually your throttle sensor, air flow meter, oxygen sensors, engine temp and a few other sensors regulate the combustion process. With a large leak, there is too many variables for the system to adequately compensate. If it's a small corrosion hole, or a hairline crack, you will probably be fine... but if its a .22 sized bullet hole, forget it.

That's how it works in a petrol system at least. All this black magic diesel shenanigans has me beat sometimes, so don't take it as gospel.

Yeah its only small. There is a little bit of oil coming out of it. Like its been nipped with a screw driver or something. I thought it felt down a bit on power.

Sent from my GT-I9300 using AULRO mobile app

So what boost pressure does a stock defender make?

Im no expert (again), but wouldn't oil in the intercooler and charge piping suggest either:
-leaking turbo seal / CHRA
-excessive blow by, increased positive crankcase pressure
-excessive EGR activity.

Not sure where the crank case ventilation runs to, nor where the EGR feeds back into the intake, but it would mostly be after the intercooler though?