What's wrong with it?

[pinkytoe69]

@discostew @jymmiejamz or any other SME wanna take a stab at what you think the issue is?
https://www.motorious.com/articles/news/samcrac-cheap-range-rovers/

 

[jymmiejamz]

I just skimmed through the video and didn’t see what the concern is that he’s trying to fix. Can you give a rundown without me actually watching that whole video?

 

[discostew]

Look at about 13.52 into the video. Some of those valves look open even though the cams out of it. But pictures and video just never show what you see in person. Most times I've seen misfires down a bank like that its because one of two things. Injector stuck open causing the whole bank to shut down because all the raw fuel. Or camshaft timing. He mentioned he got the car back with no more cam crank corrolation faults. Tells me they fucked with the timing chains. I learned the hard way that if the exhaust cam is out of time in one direction( I think advanced) it might not flag a corolation fault. It will have misfires down the whole bank untill the ecm just shuts that whole bank down. At that time the reduced power message pops up.

So since he's not saying he smells raw gas and its shaking like a dog shitten glass, I would be rechecking that cam timing. I do it with a pico scope in cases like this. You can stack the patterns and see if one of the cam sensors is not where it's supposed to be.

 

[pinkytoe69]

I just skimmed through the video and didn’t see what the concern is that he’s trying to fix. Can you give a rundown without me actually watching that whole video?

It runs fine for a couple miles, then gives misfires down all of bank 2.

 

[pinkytoe69]

So since he's not saying he smells raw gas and its shaking like a dog shitten glass, I would be rechecking that cam timing. I do it with a pico scope in cases like this. You can stack the patterns and see if one of the cam sensors is not where it's supposed to be.

In the "epilogue", he is almost positive it is timing related.

After 2 weeks he couldn't figure it out, but he couldn't sacrifice anymore time so he had to move on.

 

[jymmiejamz]

I have seen that when someone didn’t tension the drive side of the chain when they tightened the VVT gears. This one never set timing faults, just misfires.

 

[discostew]

The one car I had was retimed by a damn engineer. one tooth off on the left bank exhaust cam. I had another engineer in front of me making excuses for the other ass hat about timing tools worn out. I told him he was dreaming.

Rotate the engine two revolutions and put the timing tools back on the engine. That's where this job goes bad. people do 50 timing chain jobs and then they stop rechecking themselves.

 

[jymmiejamz]

Rotate the engine two revolutions and put the timing tools back on the engine. That's where this job goes bad. people do 50 timing chain jobs and then they stop rechecking themselves.

I stopped rotating the motor years ago after having a tensioner collapse while doing it on more than one occasion. I think the tensioners need oil pressure to prevent this from happening.

 

[pinkytoe69]

How do you think the timing got thrown off in the first place?

Stretched chains?

 

[discostew]

Well, usually the whole shitshow starts when something like a tensioner guide fails. I've seen a couple lately where one of the boltsbreak off in the block and the guide is just flopping around and valves are hitting pistons. So thats how it starts, then some guy "fixes" it but doesn't get the valve timing right. Most times you get the cam crank corolation faults right away on startup. But there are those few that sneak by with that exhaust cam advanced. I have no idea why the cars I've seen like that had no corolation faults. It's probably about plausability. Why monitor for something thats not mechanically possible.
When I've seen that cam timing problem I would describe the idle the car had as busy. it wasn't smooth, but it didnt feel like it was dropping a cylinder. It just wasn't a normal idle. I watched the misfire counters and they all just incrimented up slowly on that bank untill the ECU turned off the injectors. Once that happened the reduced power message comes on and a key cycle would bring it back for a while. Good times.

 

[discostew]

I stopped rotating the motor years ago after having a tensioner collapse while doing it on more than one occasion. I think the tensioners need oil pressure to prevent this from happening.

That has never happened to me. But I have had some that I've had to help that tenioner out of its bore. But once its against the guide the spring has always held the chain tight. Never turn it counter clockwise for sure. It makes horrible noises at those tensioners when you do that.

 

[pinkytoe69]

people do 50 timing chain jobs and then they stop rechecking themselves.

I've been musing about getting a late model L322...

I read Blues LR4 thread.

How common are timing issues on the 5.0?

 

[discostew]

I've been musing about getting a late model L322...

I read Blues LR4 thread.

How common are timing issues on the 5.0?

It's not real common for them to let go. But all of them are noisy as hell. Even with new chains and guides. Also noisy from the fuel system. So it's just a noisy damn engine. If I was to buy a Range Rover right now. Not needing a vehicle just buying something cause I really really liked it....it would be a '09 L322. That truck with the 4.4 is probably my favorite to drive. But it doesn't hold up as well as the new chassis.