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Hi megatexture..Nissan have told me that as well its a common issue, theres a reason why it happens and thats where the conversation with them finishes, i was told its a heat issue which means to much fuel,and thats what im trying to solve,this is my second time its had to be machined in 100000k,u cant keep doing that.ill be posting more info as i get it. Cheers thanks for u reply
Got my patrol back,they fixed the exhaust manifold,the slight oil leak in turbo,they think it could of been the catch can going back into turbo.I took it back to the guy who installed it,he thinks it could of been the catch can as well,keeping an eye on it.
Cheers Eric
Its a custom made one by ASE,couldnt fit a market one, not enough room under the bonnet,but ASE are working on a new design for the 3lt crtd..The guy down there said ur always going to get a little oil in the turbo,impossible to stop all of it.
but my next know is to get the injectors looked at...ill keep in touch...Cheers Eric
Had a quick read though all of this to answer your first question 20psi of boost is not to high crd engines can run crazy amounts of boost without doing any damage to them. they are not like a petrol engine. If you run them up to 22psi you will hit limp mode as the airflow meter will see to much air. But as someone else suggested it will keep tipping fuel into as it sees more boost so it might not be the best of ideas. Patrols run extremely rich from factory so it's not uncommon to see them reach such high temperatures especially when under tow. The problem is they are designed for higher octane diesel which we do not have in Australia so from factory they have crazy diesel rattle and as you said, blow smoke and excessive egt's as a result. There are a few things you can do to fix it, one is up the boost which you've done, make sure the injectors are programmed correctly which you're doing so will be interesting to see the results.
when you notice such high egt's is it when the car is under load? have you tried dropping it back a gear? and do you have an aftermarket exhaust fitted to it?
Gooday Dieselsmart thanks for reading and replying to my thread....yes the high EGTs is mainly underload, i had a Tiapan 3inch exhaust fitted after 6months old the patrol.The guys at ASE in adelaide had to put the boost that high to get the fuel ratio right really had no choice..to try and get temps down.
to have the exhaust manifold go twice in 100000kms, is annoying and to have the EGR valve replaced as well..just full of soot.my last resort is the the injectors get them checked...and my last final resort is ...buy a TOYOTA...grins....jking
ill let the forum know whats happens...Cheers
Hi mate, not sure on your setup regarding the exhaust manifold but is yours a cast iron mold? These are less prone to cracking however do hold the heat more which means the boost can kick in during the earlier rev range. Know a fella who briefly ran his turbo at 35 psi until he drained all the oil from the sump lol but he swears by the cast iron mold for reliability. Just food for thought.
gooday Hippo..im not sure about the exhaust manifold what its made from..its still the original from factory...it didnt actually crack..it warped due to the heat. cheers and thanks for the reply
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