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DISCO3.CO.UK > Technical (D4)

Timing Position

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Discobob!!!

Member Since: 08 Mar 2024
Location: Manchester
Posts: 23

Timing Position

Hello, i have a thread going for another issue which i think I’ve resolved but!

Say one stupidly removed the timing belt before locking the flywheel and stupidly moved the crankshaft. How would one ensure it’s correctly timed.

I taken the starter motor off to just check how many holes there is and theres 4 i think i counted. So how would i know which one to use for the correct timing? The car starts but misfires on one side (drivers) and i think its down to the timing being off or i at least want to rule it out by checking.

I’ve swapped injectors and the problem remained on that side.

I don’t know if there’s anywhere on the flywheel or crank pulley that would indicate TDC for cylinder 1 would there?

I get its a stupid move to make but i need to know how i can now retime it but the fact theres at least 3 holes in the flywheel is really annoying

8th Apr 2024 5:45 pm

Jimbob42

Member Since: 23 Mar 2022
Location: Leicester
Posts: 171

2005 Discovery 3 TDV6 SE Auto Tonga Green

I’m sure the timing hole is stepped back slightly, as in this picture.

Click image to enlarge

8th Apr 2024 7:40 pm

Disco_Mikey

Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20830

2005 Discovery 3 TDV6 HSE Auto Cairns Blue

There is 1 hole in the flexplate that has 2 sides "flattened"

This is the correct timing hole

Click image to enlarge

Any holes that are perfectly round are TC bolts or balance drillings

My D3 Build Thread

TDV8 Retrofit Build Thread

8th Apr 2024 8:38 pm

Discobob!!!

Member Since: 08 Mar 2024
Location: Manchester
Posts: 23

Hmm ok I’ll have a look again tomorrow and try and measure which hole is set back a bit more. Yeah I shouldn’t have done what i did but surely a nice mark on the metal wouldn’t have been too much to do from the engineers 🤦‍♂️

Thanks mate

8th Apr 2024 8:40 pm

Discobob!!!

Member Since: 08 Mar 2024
Location: Manchester
Posts: 23

Disco_Mikey wrote:
There is 1 hole in the flexplate that has 2 sides "flattened"

This is the correct timing hole

Click image to enlarge

Any holes that are perfectly round are TC bolts or balance drillings

Yes I actually seen one that looked different to the others! Perfect thanks mate

8th Apr 2024 8:43 pm

Discobob!!!

Member Since: 08 Mar 2024
Location: Manchester
Posts: 23

Ok found the right one and it was the one i put the crank lock in last time because i can see the slight marks on it which are still fresh so thanks for confirming.

Going to the front and locking the cams, it seems the pin on the exhaust side is really loose compared to the other side. Do the cam pins have to go all the way into the head? Or just enough to lock the pulley?

If they’re supposed to go all the way in then I’ve maybe F-ed the timing. They do go in but id expect them to go in further and be a bit tighter.

Cheers Bob

11th Apr 2024 5:28 pm

PROFSR G

Member Since: 06 Mar 2017
Location: Lost
Posts: 5024

2009 Discovery 3 TDV6 Commercial XS Auto Stornoway Grey

They can be a bit tight on one side or other, but if you try to move the offending pulley fractionally the pin should go in. And yes, they need to be straight and fully home, but if you're that close I doubt it's a timing issue.

Click image to enlarge

yµ (idµ - eAµ) ψ=mψ

11th Apr 2024 8:00 pm

Discobob!!!

Member Since: 08 Mar 2024
Location: Manchester
Posts: 23

Thank you everyone found the pin holes and all 3 aligned and then again after 2 rotations so all good on that front.

Hasn’t resolved the problem but ive got another thread about that

14th Apr 2024 10:35 am

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