Post # 10

https://www.jaguarforums.com/forum/x...-chain-246239/

 

Finally got a decent recording of my timing chain cold start noise,
some days are worse than others. Does this sound normal??

 

2010-2012ish 5.0 uses the bottom chain..

 

It is so difficult to tell from recordings due to the quality of the recording and reproduction systems but I can't say that I can hear anything particularly untoward.

Richard

 

Driving home today stalled out threw obd code # p0340 crank
no start, did I just skip timing? waiting on a tow now

 

Crank syrong gas smell, no start.
occasioannally the crank sounds like its hitting something.
Pretty sure I just lost my timing...

 

 

Pretty sure im screwed.

 

That's really bad. I feel for you.

The most common problem with the earlier 5.0 tensioners is the alloy insert which forms the pad against which the hydraulic tensioner operates. Being relatively soft, this wears until the tensioner runs out of travel. Why JLR thought that saving a few grams by not using a steel insert was a good idea is beyond me.

Richard

 

You were spot on Richard,
I hope others will learn from my mistakes.
My chain rattle was very very light
and only on cold start.. into the shop tomorrow
this is beyond my expertise although the motor cranks just fine
the PCM wont allow spark cause the timing is too far off.

 

Dear Tarokyama,

I also feel for you with this issue and I so much appreciate that you keep us updated on this.

I understand your car suffering this issue is a 2010 XK. Not sure you mentioned your mileage though - I would be very interested to know at what mileage you started to notice the chain noise issue on startup.

Not without reason I am following here with great interest. I drive a 2011 XK with approx. 35k miles on the odo (it has the narrow version of the chain as visible trough the oil filler hole, see pictures above).

br
ter

 

UPDATE, my mechanic suspects injector failure,
and not timing chain, I did do the valve cover gaskets
and clean injectors mechanically 3 weeks ago.
Upon stalling I had tons of smoke out the exhaust.
which is why he suspects injector failure, (common)

I will update after he does a compression test and inspects
The valves and injectors.

Mileage is 69k

 

My fingers are crossed.

Richard

 

If the exhaust smoke was black, then yeah, probably injector.
As a caveat to that, all the raw fuel in the exhaust can easily foul the catalytic converter. Watch for codes once your car is running again. Also maybe as a pre-emptive, run a can or two of Catalytic Converter Cleaner through the fuel.

 

It was an injector! Stuck open!!!,
waiting on parts but my mechanic
warned that fuel got dumped into the cats..

 

BTDT,GTTS.

 

Great!!!

 

Pulled spark plugs from cylinder 1 and 2 on drivers US side,
heres what I got any thoughts?

Im changing all the spark plugs and 1 bank of injectors
apparently removing injectors with the alide hammer is
detremental to your injectors
Im back up and running and my fuel trims on one bank
have zerod out at idle. Amazing.

70k miles original plugs after injector failure and engine flood.

 

I would be happy with those. 🙂

Richard

 

Thank you everyone for your support.
you guys are amazing.