3.0 D4 rear belt timing marks

[Graeme]

The version of the D4 WSM that I have shows a timing mark on the cam pulley in step 19 as being mid-way between 2 bolts on a spoke yet at installation step 4 with the pulley in the same position the timing mark has moved, now vertical and mid-way between the earlier spoke and the bolt to its right. It seems logical to have the timing mark vertical as per the assembly diagram and with the marks shown in different positions on the pulley, I suspect that step 19 is incorrect. Knowing which one is correct should assist with lining-up the crank-shaft for locking pin fitment.

Can anyone advise which timing mark position is correct please?

[justinc]

Hi Graeme is this a job for body on??? Surely not???


😮


Jc

[Graeme]

Yes JC. I'm expecting mostly by feel with judicious use of a mirror tool and anticipate some skin loss. A pump sprocket locking tool has been obtained.

[justinc]

😕😣 not looking forward to my first one then. Have a hard enough time getting my arms into the d3 and i reckon they have more room 😮.

😭😭😭😭😭

Jc

[Graeme]

There will be 2 of us dong the job so can share the frustration and pain.

[SBD4]

Graeme, I have "Discovery 4 2009-2011 R & W" published 11 May 2011. Let me know if you want me to check.

[Graeme]

Yes please. Hopefully it will agree with one of LR's diagrams.

[LRD414]

Graeme, I think that I have a copy of the same WSM as Sean, published 11-May-2011.
It appears to have identical steps 19 and 4 as per what you've described with the same discrepancy in timing marks.

https://www.aulro.com/afvb/images/imported/2016/03/395.jpg

https://www.aulro.com/afvb/images/imported/2016/03/396.jpg

Regards,
Scott

[Graeme]

Yes, those are the conflicting pictures.

Its not a show-stopper in any way as the truth will be discovered when looking for the hole to lock the crankshaft.

Picture 4 doesn't have the pump sprocket quite correctly aligned according to the picture at step 3 so picture 4 can only be used as an instruction to align the marks. As picture 3 shows an indent on the pump sprocket, I assume the cam sprocket will have a similar indent and that it will be vertical prior to cutting the existing belt.

[shanegtr]

Is there a marked position on the belt cover that the timing marks on the pulleys can line up with?

[Grentarc]

There will be 2 of us dong the job so can share the frustration and pain.

I remember you volunteering my hands for this job.

[Graeme]

Is there a marked position on the belt cover that the timing marks on the pulleys can line up with?
With the crank-shaft locked, the cam pulley will be locked in the correct position providing the mark is anywhere near the top of the pulley rather than at the bottom from being on the incorrect crank-shaft cycle. The pump pulley's position is set by the tool. The tool should slip into place with the old belt still fitted but cannot be fitted until the new belt is on the pulley. Hence the pulley can easily move and the need to fit the tool with the timing mark at the top rather than at the bottom. Marks elsewhere would just confuse the alignment requirements.

[DazzaTD5]

😕😣 not looking forward to my first one then. Have a hard enough time getting my arms into the d3 and i reckon they have more room 😮.

😭😭😭😭😭

Jc

You and me both...

Regards
Daz

[Graeme]

Well we've demonstrated that changing the 3.0's READ without removing the body is possible but suggest that workshops don't do it as we expect that the labour would far exceed that required to R&R the body. My son and I worked non-stop for 7.5 hours to get as far as fitting the belt then mostly me another 5 hours reassembling. There just isn't reasonable room to manoeuvre the cover to get it out nor the bracket that has to be removed due to the array of wiring harnesses and hoses, especially when refitting.

The location of the timing mark on the cam sprocket was a non-issue as the camshaft was locked by the flywheel locking tool - we didn't even check where it was. The timing mark on the pump sprocket was readily felt and visible using a torch and mirror.

[Grentarc]

The location of the timing mark on the cam sprocket was a non-issue as the camshaft was locked by the flywheel locking tool - we didn't even check where it was. The timing mark on the pump sprocket was readily felt and visible using a torch and mirror.

Also, you really do need to allow the cam sprocket to float (therefore it's TDC mark becomes irrelevant - if it has one!) when fitting the belt and also when releasing the tensioner - the WSM forgets to mention backing off the 3 bolts before fitting the new belt, but it does mention that they need to be tightened.