VQ25DE

From ElgrandOC Wiki
Jump to: navigation, search

2.5 V6 (VQ25DE) – E51

Performance

  • 190hp (140kW) @ 6400rpm
  • 174lb-ft (236Nm)

Details

  • Capacity – 2495cc
  • Bore – 85mm
  • Stroke – 73.3mm
  • Block – ???
  • Cylinder Heads – Aluminium

Notes

Other details are currently unknown, I am researching this to add more information.

Common Problems

The Nissan V6 set up includes 4 catalytic converters (cats). A pre cat and a main cat on each bank of cylinders. The problem with this set up, is that the front, pre cats disintegrate and block the rear main cats. This means the exhaust flow has no where to go but back into the engine, which can cause premature detonation of the engine block.

The best way to resolve this issue is to remove the problematic front pre cats. But as they are quite hard to get to, which means more expense, most people aim to remove the rear cats. The problem with doing this, is that when the front ones deteriorate, although it will not block the rear cats (they aren't there any more), they will still hollow out and cease to function which could be an MOT failure for emissions readings.

The 3rd option is to just get all 4 cats removed. This can be done with no negative impact on emissions if you also convert to LPG. LPG is a much cleaner burning fuel, and emissions are naturally a lot lower than petrol.

Alternate Vehicles with this engine

  • Nissan Cefiro (1994-1998)
  • Nissan Cefiro (2000-2003)
  • Nissan Leapard (1996-1999)
  • Nissan Cedric (1997-1999)
  • Nissan Fuga 250GT & 250XV (2004-2007)
  • Infiniti M (2004-2007)
  • Nissan Teana (2008->)
  • Renault Samsung SM5 (2010->)
  • Renault Latitude (2010->)