Thread: Until NOW !!!....TD5 ValveTiming ...

Originally Posted by Pippin

Surely if you are using the timing pins correctly you are adjusting for any chain wear or head skimming anyway and setting to manufacturers specification. Anything else is risky and I think unnecessary.
Nick

The idea to post this article was to see if changing the valve timing would give better performance, my TD5 has never been a speedster so after doing lots of research I found there might be a way to get it without rebuilding the motor which is still on the cards. So I tried the valve timing adjustment. Risky yes, likelihood of huge damage no, as only moving in the slots I couldn't see any reason not to try it.
If Land Rover knew their timing was correct every time for every engine there would be NO slots ......only bolt holes.
I am not saying everybody change it or even play with it, I know the risk and took it, this is just my experience, maybe it can help some body. If nobody ever tried anything new where would we be......
Ian

The slots are there so that you can use the timing pins to reset and take up the wear and keep it at factory settings.
Nick

Originally Posted by bronson

Is the td5 self adjusting? Is it hydraulic or solid lifters?

Cheers
Bronson

The chain has a oil assisted tensioner so it's set and forget till the motor is worked on.
The valves use a small hydraulic lifter so no tappets to set
There is an adjustment for the injectors but again it's set and forget till any motor work happens.

Originally Posted by justfishing

Hello,
Yes did lots of research and reading the RAVE manual, Basically the pin is in the flywheel and pin in the top camshaft. I removed the top pin and looked in the hole. You could clearly see that the groove in the cam shaft was not in line with the hole despite the pin fitting in, I measured it to make sure the pin was at the bottom, I moved the camshaft so it was perfectly in line with the hole then about a 1 mm further if that. Still have the hesitation, but also the driver demand so still looks like the TPS has a dead spot just on or after movement. Thank you for you thoughts
Ian

Rereading this post Ian it sounds like the cam wasn't timed right when the head went back on(it's taken me 3 goes to get right).
There will be a small bit of movement around the pins(or in my case drill bit shanks).
I've found it better to rotate the engine in direction of rotation slowly till the crank pin slips in.
(If you miss the hole don't crank it backwards as the chain will not be loaded on the right side of the cam sprocket)
Then as you did have look into the cam pin hole.
The 1mm you added may just be compensating for a loose pin in the crank lock.
As a hint I get it right and then remove each of the 3 bolts individually.
I then Loctite and tension each bolt while the other 2 hold the adjustment.

Cheers, Kyle.

Advancing or retarding the valve timing by 2 or 3 degrees will make a small difference to engine performance, but what you are also changing on the TD5 is the injection timing. A very small change to this will make a BIG difference to how the engine runs.

Cheers,
Terry

Originally Posted by rover-56

Advancing or retarding the valve timing by 2 or 3 degrees will make a small difference to engine performance, but what you are also changing on the TD5 is the injection timing. A very small change to this will make a BIG difference to how the engine runs.

Cheers,
Terry

For better or worse?

Depends which way you move it! From what I can read as to how justfishing is adjusting there is very little risk. Slow and steady and lots of reading and study of the book is the name of the game when playing like this. No motor, regardless of it being petrol or diesel is set for optimum performance from factory. Each is, regardless of what a manufacturer states, an individual.And as such is able to be tweaked to a certain degree, but what works on this motor may have little or no gain on the next.
Rover 56 is correct saying valve timing has less effect on a diesel than altering the injection timing, but in combination there will be a point of unison.

Cheers Scott

Originally Posted by rover-56

Advancing or retarding the valve timing by 2 or 3 degrees will make a small difference to engine performance, but what you are also changing on the TD5 is the injection timing. A very small change to this will make a BIG difference to how the engine runs.

Cheers,
Terry

Not true..........it's electronic, controlled by the ecu. The cam provides pressure, with timing, duration and volume controlled by the ecu.

To set cam timing to factory spec you need to insert the pins in the flywheel and cam, hold the cam so it can't move, loosen the adjusting bolts and rotate the cam gear to take out any slack in the drive side. If you run out of adjustment you have a very worn cam drive train.

The injection timing is controlled by the ecu, but it still depends on the base timing of the injector cam being correct.
Terry