"Andrew Cleland" <ajc219@[EMAIL PROTECTED]
> wrote in message
news:g4vist$881$1@[EMAIL PROTECTED]
> Andrew Cleland wrote:
>> Badger wrote:
>>> "AndyC" <cleland72@[EMAIL PROTECTED]
> wrote in message
>>>
news:7ed23c66-e1e2-44f1-9f90-445f9a340eb5@[EMAIL PROTECTED]
>>> On Jul 7, 10:39 am, "GbH" <Geoff_Hanning...@[EMAIL PROTECTED]
> wrote:
>>>> AndyC wrote:
>>>>> I've just got a new camshaft for the 3.9i I'm rebuilding for the
110.
>>>>> It's one with the step machined into the end by the timing gears to
>>>>> allow it to work with the retaining plate fitted to the later
engines.
>>>>> I know the interim engines (gear driven oil pump and dizzy) had a
>>>>> full- circular retaining plate and then on the 4.0 and 4.6 LR moved
>>>>> to a semi-circular plate. Does anyone know if the critical
dimensions
>>>>> are the same for both types of plate (i.e. will either work with my
>>>>> cam)? The semi-circular ones seem easy enough to get hold-off, the
>>>>> interim ones less so - in-fact I can't even find a part number for
>>>>> them.
>>>>> I'm assuming it's a good idea to fit one - it's just a case of
>>>>> drilling and tapping a couple of holes in the block (avoiding oil
>>>>> ways) and I know the original method of location, relying on a taper
>>>>> on the cams reacting against the lifters, isn't considered a
>>>>> particularly great bit of engineering.
>>>>> Cheers,
>>>>> Andy.
>>>> Ask Badger, I'm sure he will know.
>>>>
>>>> --
>>>> Wisdom and experience come with age, they say, but I wish I could
>>>> remember the darn question
>>>
>>> Yes, hopefully he'll be along with his vast wisdom.
>>>
>>> Digging a bit further, it looks like the thrust plates are different,
>>> with the 4.0/4.6 having a smaller diameter. As my cam was sold as for
>>> a 3.9, it looks like I'll need the larger, interim, thrust plate -
>>> anyone know its part number?
>>>
>>>
>>> The plates are indeed different and you need the right one. Sorry, I
>>> don't have the part number to hand, but be carefull when drilling the
>>> holes as they are offset slightly below the cam centreline to give
>>> clearance to the oil galleries.
>>> Badger.
>>>
>>
>> Thanks Badger. I'll keep digging for a part number and exercise care
with
>> my drill!
>>
>> Andrew.
>
> Just to follow-up on my own post, I think I have the correct part
numbers
> now. If anyone else needs them, they are:
>
> Thrust Plate, Camshaft. Interim, 3.9, - ERR5926
>
> Thrust Plate, Camshaft. Late, 4.0/4.6 - ERR2609
Forgot to mention - be careful what thickness of bolt heads you use - you
need clearance between the bolt head and cam sprocket, and the standard
bolts are most likely a UNC thread. The thread, at a glance, looks like
it's
probably metric but every other thread in that block is UNC (regardless of
bolt head size!) so be careful.
Badger.
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