October 4X4 mag , Patrol test
Submitted: Monday, Sep 08, 2003 at 16:02
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squiz
Have any 4.2 diesel owners read the latest tests for the 3 engines.
Do you think the heat the engine generates working it in sand is much
of an issue , and if so what would be the best remedy. besides bigger
rad. Does a 3 inch exhust pipe help ,
I believe not letting an engine overheat is one of the most important
things you should make sure of. So having the new 4.2td intercooler
engine I want to look after it . What expirence do other 4.2 owners
have
Thanks
Reply By: squiz - Monday, Sep 08, 2003 at 18:27
Monday, Sep 08, 2003 at 18:27
The new Patrol 4.2 does have the same rad as the 4.8.
4X4 Australia says the 3.0 litre rad is 50% bigger.
When they were testing the 3 engines in beach
sand , they said the temp really climbed in the 4.2
It didn't overheat , but it was a concern.
Also the new 4.2 recirculates exhust gas , I guess polution
control. Which is the one bit of electronics on the engine.
It has a throttle position sensor.
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Follow Up By: Old Jack - Monday, Sep 08, 2003 at 22:27
Monday, Sep 08, 2003 at 22:27
The EGR actually reduces the temperature of combustion by adding a small amount of inert gas back into the combustion chamber. it is very common on more Modern deisel engines. the EGR is only open under certain running conditions. The new 4.2 motor also has electronic injection timing control to improve reponse & emmisions, from memory the last version GU injection timming is retarded slighlty compared to the previous model for emission control reasons, the newer version with the electroninc control varies the timing slightly.
as for the inter cooler they actually add to the engine heat load as more oxygen + fuel equals more heat, hence the upgraded radiator and the EGR!
Having driven the new version 4.2 after the older one the engine response is better even when cold, on paper the power ouput is nothing to call
home about but it's drivability has been improved enough to be noticable.
next more is to go 24valve overhead cam then the tojo boys would have to really watch out!
happy travelling
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