[x300] Cam positioning sensor

X300
1

What is involved in replacing the CPS?
Thanks–
Ray…86 xj-6, 97 xj-6 vanden plas
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–

2

In reply to a message from ray lyons sent Sun 13 Oct 2013:

I have never done one, but I assume you need to get one, take th
old one off, and line up some timing mark as you put the new one
on. I would expect it would be pretty easy. But, I suspect
replacing the hall effect in the old one would be easier.

If you are going to do it yourself, I will look up the R/R
procedure and send it to you.–
Ross - 89 XJS, 99 XJR, 02 XJ8, 12 XF-R
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php –

3

In reply to a message from ray lyons sent Sun 13 Oct 2013:

The entire assy is NLA so it seems that you must replace the
internal sensor much like a reluctor and pick-up assy in a
distributor.
They seldom give trouble but I have replaced them when I was
at the Jag dealer.

Years ago we replaced the entire unit but I called Jaguar
parts for a price about 2 months ago and was told that the
part number had changed to the internal replacement part.

I found several on ROCK AUTO for between $100 and $200.

bob gauff–
Bob Gauff Owning and Repairing Jaguars Since the Early 70’s
Decatur, TX., United States
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php –

4

In reply to a message from motorcarman sent Sun 13 Oct 2013:

I don’t know what the shipping cost would be but he will
ship to the US.

http://www.ebay.co.uk/itm/JAGUAR-XJ6-X300-CAMSHAFT-TIMING-SENSOR-/251244427367

This extract from Jim B’s website may also help:

Engine Timing the easy way:

refers to the problems I have had in ascertaining the
correct way of setting up the cam position sensor (the unit
where you might expect to find a distributor) when it took
several churns of the engine before it would fire (though it
was fine once running).

  1. pull the crank around (use a 15/16’’ or 33mm half inch
    socket on the crank bolt - it JUST fits without removing the
    fans) until the missing tooth is exactly under the
    CRANKSHAFT SENSOR (not the POINTER).

  2. look at #4 inlet cam lobe through the oil filler cap hole

  • if it is up then this is the correct TDC. If the cam is
    down (i.e. pushing the valve open) then rotate the engine
    360� and check again.
  1. remove if necessary and reset the CAM POSITION SENSOR so
    the dimple shows in the window. It is easier to see where
    you are if you take the top off (20 torx). You should end
    up with the dimple alongside the coil thingy on the right
    hand side. When the top is replaced the dimple should be in
    the centre of the window.

Now the engine starts IMMEDIATELY on the first compression
and without jiggling the accelerator pedal.

I initially set the missing tooth against the pointer - big
mistake and it wouldn’t fire at all. Which leaves the
question - why is the pointer there in the first place as I
cannot see anything to line it up to.

Although I used a 3/4’’ socket to get the crank bolt off when
I did the timing chain guides, this large spanner won’t fit
when the fans are in place so I bought a shallow 1/2’’ socket
(15/16’') as I was only pulling the engine over.

In my defence, I put everything back ‘‘as it was’’ - the
engine was not good at starting before but as it is my first
Jag I didn’t know what to expect. It now appears that I
bought it with the cam sensor set about 120� wrong! No
wonder nothing made sense though it proves how good the
electronics are!–
The original message included these comments:

I found several on ROCK AUTO for between $100 and $200.

–
Neil 1997 3.2 http://www.jag-lovers.org/v.htm?1242166704
MALDON, United Kingdom
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php –

5

In reply to a message from Neil Maldon sent Mon 14 Oct 2013:

This may be better:

The original message included these comments:

I don’t know what the shipping cost would be but he will
ship to the US.

–
Neil 1997 3.2 http://www.jag-lovers.org/v.htm?1242166704
MALDON, United Kingdom
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php –

6

In reply to a message from Neil Maldon sent Mon 14 Oct 2013:

This page helps with timing and shows a picture of the Cam sensor;

http://www.go-lpg.co.uk/X300_Engine_Timing.html

Good Luck

Steve–
Jags on gas
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php –

1 Like