pajero 3rd gen exhaust manifold Crack

[Michael asir]

Dear Carnity offroaders  ,

Recently i have found crack  my  pajero 3rd gen exhaust manifold , is there is any  options  to upgrage the  performance through replace   bigger size manifold / exhaust modificaiton , looking for  valuable  advise .

[Frederic]

Hi @MICHAEL PAJERO single door

I am somewhat surprised that the performance of your Pajero is not satisfactory. A 3.8 two door Pajero is usually more than powerful enough to tackle any terrain in stock condition, let alone after doing performance upgrades like better intake and exhaust systems.  I suspect there is another issue with your Pajero that is holding it back from unleashing its power. Unfortunately there could be many possibilities, like timing, engine wear, injectors, fuel distribution, spark plugs, etc..

Do you have the maintenance history of this car ? Has the engine been replaced or rebuilt ? Is the maintenance fully up to date ?

I would get the manifold welded or replaced with a scrapyard one if you can find it. Adding a performance muffler and slightly bigger diameter pipe can help the car to breathe more easily, but I think in your case there is something else holding it back. 
 

I faced a similar issue with my 99 3.0 Pajero years back. It simply had no power. Took many mechanics and lots of trials until a mechanic found out that the timing was set wrongly. Took him 15 mins to adjust and it turned into a completely different car. 

[Michael asir]

@Frederic Thanks for your   clarrficaiton ,i dont have  mintanance  history  engine  replaced or rebuilt ,   am getting enough power   during the drives  , only thing  is  during the  self recovery on Low gear  , engine temperature  shooting up  , after facing temp issue , i hae  Replaced Radiator recently , As advised by  Gaurav  i have  installed Extra fan also ,  still facign  the same , before  going for repalce / repair the manifold ,  so  asked  some opinion   .

[Gaurav]

I second with Fredy on this, first it's wise to fix what is evident (like manifold leak) repair or change, and then also dig deeper by bringing the car back to stock shape, as many times wrong mods cause a lack of power.

My number one suspect in your car was the air filter, as Imran mentioned it's for fuel efficiency, so that would be a good starting point to remove fully and bring back to stock with OEM setup and filter.

3.8 + SWB Pajero has much more power than your current car displays.