On 24/07/2015 02:59, Clive George wrote:
On 24/07/2015 02:17, John Rumm wrote:
On 7/23/2015 5:40 PM, Clive George wrote:
On 23/07/2015 13:19, Big Les Wade wrote:
Alan Braggins posted
In article , Jim GM4DHJ ... wrote:
"Charles Hope" wrote in message
...
Jim GM4DHJ ... wrote:

dual mass flywheels, turbos to get any performance,
particulate filters etc etc....

What's wrong with a turbo?

ask a nissan xtrail with intercooler ....

I have a diesel Nissan X-Trail which has done over 200,000 miles.
What's wrong with a turbo?


He's referring to the fairly common fault on the T31 model where the
intercooler leaks oil into the turbo, and buggers it up by
overboosting it.

That's a bit dumb. Intercooler should be a really simple device -
air/air radiator.

Sounds more like a charge cooler.

Same thing innit? Wikipedia thinks so.

Ah, the problem with the X-trail is the intercooler leaking at the sides.

The leak (air) makes the turbo overboost to compensate which eventually
kills it.

Any oil which is in there from turbo bearings leaking a bit also leaks
out rather than getting burned.

(ie it's not intercooler leaks oil into the turbo, which would be a bit
surprising since the intercooler is after the turbo, not before it)


On the T30 the intercooler is *after* the turbo and does indeed fill up
with oil when the turbo bearings are shot.
Can very easily lead to the engine running on the oil and destroying
itself. But you'd never let a turbo get that bad, would you?

In article , Big Les Wade wrote:
Alan Braggins posted
In article , Jim GM4DHJ ... wrote:
"Charles Hope" wrote in message
. ..
Jim GM4DHJ ... wrote:

dual mass flywheels, turbos to get any performance,
particulate filters etc etc....

What's wrong with a turbo?

ask a nissan xtrail with intercooler ....

I have a diesel Nissan X-Trail which has done over 200,000 miles.
What's wrong with a turbo?

He's referring to the fairly common fault on the T31 model where the
intercooler leaks oil into the turbo, and buggers it up by overboosting
it.

Google suggests it's the older T30 (like mine) that had the problem with an
intercooler design that was changed, but there still seem to be plenty of
them on the roads. In any case, extrapolating from "one model of car has
turbo problems" to "turbos are bad" seems excessive.

On 24/07/2015 14:12, Lee wrote:
On 24/07/2015 02:59, Clive George wrote:
On 24/07/2015 02:17, John Rumm wrote:
On 7/23/2015 5:40 PM, Clive George wrote:
On 23/07/2015 13:19, Big Les Wade wrote:
Alan Braggins posted
In article , Jim GM4DHJ ... wrote:
"Charles Hope" wrote in message
...
Jim GM4DHJ ... wrote:

dual mass flywheels, turbos to get any performance,
particulate filters etc etc....

What's wrong with a turbo?

ask a nissan xtrail with intercooler ....

I have a diesel Nissan X-Trail which has done over 200,000 miles.
What's wrong with a turbo?


He's referring to the fairly common fault on the T31 model where the
intercooler leaks oil into the turbo, and buggers it up by
overboosting it.

That's a bit dumb. Intercooler should be a really simple device -
air/air radiator.

Sounds more like a charge cooler.

Same thing innit? Wikipedia thinks so.

Ah, the problem with the X-trail is the intercooler leaking at the sides.

The leak (air) makes the turbo overboost to compensate which eventually
kills it.

Any oil which is in there from turbo bearings leaking a bit also leaks
out rather than getting burned.

(ie it's not intercooler leaks oil into the turbo, which would be a bit
surprising since the intercooler is after the turbo, not before it)


On the T30 the intercooler is *after* the turbo and does indeed fill up
with oil when the turbo bearings are shot.

The intercooler is always after the turbo - no point in putting it in
the cold air before it :-)

In article , Clive George wrote:
On 24/07/2015 14:12, Lee wrote:
On 24/07/2015 02:59, Clive George wrote:

Ah, the problem with the X-trail is the intercooler leaking at the sides.

The leak (air) makes the turbo overboost to compensate which eventually
kills it.

Any oil which is in there from turbo bearings leaking a bit also leaks
out rather than getting burned.

(ie it's not intercooler leaks oil into the turbo, which would be a bit
surprising since the intercooler is after the turbo, not before it)

On the T30 the intercooler is *after* the turbo and does indeed fill up
with oil when the turbo bearings are shot.

The intercooler is always after the turbo - no point in putting it in
the cold air before it :-)

I had assumed that the "inter" bit of the name was because it's between
the turbo and the engine, but apparently originally that was an aftercooler,
and an intercooler was in between multiple stages of compression.

So you could in principle have an intercooler which was before _a_ turbo,
but after either another turbo, or a supercharger.
https://en.wikipedia.org/wiki/Twin-t...uential_turbos
https://en.wikipedia.org/wiki/Twincharger#Series

But probably not on an X-Trail, certainly not a standard production one. :-)