The common Engine Problem
Chirping Type Noise From Engine Area at Idle on Land Rover Range Rover
Suggestion: The falty belt tensioner pulley normally is the major cause of this problem. To consult with your mechanics and replace the faulty pulley. A revised pulley will be recommended than Genius One as the original design has some bugs.
Rough or Unstable Idle Due to Intake Manifold Vacuum Leak on Land Rover Range Rover
Suggestion: Whilst you have such syndrome, technicans normally will suggest you to replace the gasket, especilly the one for intake manifold. Good fitment will make sure the clamping force and eliminate the idling problem.
Oil Link from front crankshaft Seal on Land Rover Range Rover
Literally, it's time to change the crankshaft seal for your Range Rover!
9 model years affected: 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2017
So....Pay more attentions!!
About L322 Range Rover
Back to 2001, L322 Range Rover were designed together with BMW and for E38 7 series. Though before the mass production launched, BMW sold out Land Rover to Ford company. Before its successor L405 are unveiled in 2012, L322 are recognized as best 4X4 sport car with many owners.
A great video about replacing the chain tensioner of L322 Ranger Rover, 2003-05 Land Rover HSE 4.4L V8 with the Engine Code:M62.
The major parts our friend replaced are the chain & guide. He found out there was an oil leak problem at the cylinder head bank 1-4. Despite of changing cylinder 1-4 is good enough, he replaced all of them. The timing chain was stretched as visually can see the length different. So timing chain system also got replaced and now his 2002 Range Rover is like a brand new one.
Here is his Youtube video: https://www.youtube.com/watch?v=RlZ3wxh3rVg
You are also suggested to pay attention on the tensioners:
And here are the chain tensioner link:
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