Lots of good timing chain threads.

Here is a 13 page one. I would do some reading.
https://www.jaguarforums.com/forum/s...q-45579/page4/
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ok Installed new primary and secondary chains and tensioners that i got from christophers. along with new plugs and an oil change (5-30).

Its still making a lot of noise. we shut car down.


Origional noies before chain replacement


It is also throwing a number of codes
P0190 Fuel rail pressure sensor
P0113 intake air sensor temperature number one , P0102 MAS sensor little input or low airflow,
P1586 throttle control unit,
P0357 ignition coil G primary or secondary circuit,
P0207 injector circuit open cylinder 7 soldier 8

After clearing all the codes the engine sounded better on startup for a few seconds then the noise started to come back.

I am interested in your thoughts the noise sounds as if comming from the throttle body area it also sounds as if its comming from the valve covers. Is the car pinging or knocking? It almost sounds like the ball in a paint can when you shake it.


One other thought is to take the serpentine belt off and see if its the water pump or pulleys? I did not change the pump.

Anyway I am really trying to solve the noise at this time

could it be the VVT and would the vvt have failed on both sides. anyway to check.

It doesnt really seem to sound like a rod.

your thoughts

 

Are you sure no chain had slipped a tooth?

 

What was found when taking it apart was that the upper tensioners looked to be in good shape and the chains were tight. The primary chain on the passenger side was loose and the tensioner for it was not extending

 

First, regarding the codes - make sure all electrical connections are tight: on throttle body, MAF and air intake sensor - these two connectors are side by side - maybe you forgot to connect them???, fuel injector 7 (and 8 - and all injectors) check all coil electrical connectors - to be tight.

All electrical connectors need to be tight - make sure you hear the "click". Also, Jaguar cheap plastic connector tangs tend to snap off, especially the tangs for coils and fuel injectors - make sure they are seated fully!

Did you set the VVT units at full retard when putting everything back together?

Sounds like something is not getting proper lubrication (could in fact be VVT unit(s) but you are not getting any VVT codes - P1383 or P1388... but then again, could be a mechanical issue with the motor as mentioned before (like a rod/bearing) and that would really just suck considering all the $$$ you invested in timing parts...

 

Take a valve cover off and start it to see if it's oiling. If it is oiling it will make a hell of a mess.

 

[QUOTE=abonano;805896]First, regarding the codes - make sure all electrical connections are tight: on throttle body, MAF and air intake sensor - these two connectors are side by side - maybe you forgot to connect them???, fuel injector 7 (and 8 - and all injectors) check all coil electrical connectors - to be tight.

All electrical connectors need to be tight - make sure you hear the "click". Also, Jaguar cheap plastic connector tangs tend to snap off, especially the tangs for coils and fuel injectors - make sure they are seated fully!

Did you set the VVT units at full retard when putting everything back together?

Sounds like something is not getting proper lubrication (could in fact be VVT unit(s) but you are not getting any VVT codes - P1383 or P1388... but then again, could be a mechanical issue with the motor as mentioned before (like a rod/bearing) and that would really just suck considering all the $$$ you invested in timing parts...[/QUOTE

1) what do you mean by setting the vvt timing at full retard?

2) will recheck all electrical connectors there is at least one or two connectors to either a coil or fuel injector where the little tang is snapped off

3) we ran the motor with the valve cover on the passenger side off and oil came squirting out of the hole in the upper tensioner. Should it be doing the same anywhere else? It did appear to be getting oil in the Val e area as well

3) if its rod or bearings I will probably sell I have had too many cars the last couple of years take over my life

4)will recheck codes

5) how can I check to see if vvt is functioning

 

Took the passenger side off and oil was shooting up out of the hole in the upper tensioner

 

Metal spacers that were under the old plastic primary tensioners were left in and the new metal primary tensioners were installed on top of them.

 

OK... I'm going to ask the obvious... (don't take offense...)

Did you follow JTIS instructions when installing the chains/tensioners/guide rails? If not... odds are you could have missed missed a step or two.

Did you lock the cams in place before taking all the chains/tensioners/rails, etc apart? Did you use the Jaguar specific tools to change out everything?

The VVT units are supposed to be set to "full retard" by utilizing the VVT setting tool. (One of those "jaguar specific" tools I mentioned above - looks like a wrench - click link below)

Vvt Setting Tool - Motorcars LTD

But, as I said - if the VVT's were the issue - OBDII would have flagged at least a P1380, P1383 or P1388 or any combination of codes showing the VVT being out of position (retarded, advanced)... or malfunctioning...

For those connections where the tangs are snapped off - just make sure the plug is fully seated in - especially the fuel injector connectors - they have caused me issues in the past...

No way to really know the VVT is functioning - but if you have no codes for the VVT - odds are - they are functioning correctly - as a thought - check connnectors at each VVT solenoid at each cam cover.

Hopefully, others will chime in with their thoughts...

Good Luck...

 

Can you check that the cams are in time??
The flats must be facing exactly the same way. They are out of time in the picture below.

Did you lock the cams in postion with the proper tool when you changed the tensioners? I saw this was asked above but did not see your reply?

Did you replace both the secondary and primary tensioners?




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Thank you for your input I will go over the jatis steps.

Also the new metal primary tensioners were installed with the metal spacers that were on the car with the origional plastice primary tensioners.

 

Did you use the shorter bolts for the tensioners?

 

One more comment. As JagV8 said below are you sure that prior to your repair the valves did not contact the pistons?

Only way to check is to pull the plugs and look at the top of the pistons. I use a boroscope but there are some pretty good small snake camera's out now.

Check Harbor Freight because I would have got one with a LCD screen instead of the boroscope. Much cheaper!

Possible damaged/bent valves could be making the noise and causing the engine to run rough??
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1) regarding possible bent valves i will check it out and see about getting a little camera or lcd etc down into the cylinders. Although I dont think this is what it is. I say this because the secondary chains were very tight and the secondary tensioners were good. The passenger side primary was loose due to collapsed tensioner it didnt appear to have skipped a tooth.

Definately worth checking into.

 

I believe the timing was set correctly but hey everything is open for questioin at this point.

A question for you about the VVT and the cams lining up. When at top dead center the cams line up. When we used a wrench to turn the engine over by hand the intake cam moves ahead quicker than the exhaust cam. When it comes back around they line up again. Is this normal?

 

1) where can i find the Jatis information

2) with the valve covers off and we turn the engine by hand. the cams start out aligned and as we turn the engine over the intake came gets ahead of the exhaust cam. However as it comes back around they are aligned again. is this normal because of the vvt or should it only be functioning when the engine is running.

3) when the chains tensioners and guides were installed the spacers for the old primary tensioners were reinstalled. I know you dont use them with the new metal primary tensioners. I was wondering what havoc that is causing.

4) anyway to test the vvt? it is not throwing vvt codes.

 

That sounds like bottom end noises not timing chain noises...

 

I hope its not the lower end.

 

Sorry I don't have more suggestions.

JTIS (Jaguar Technical Information Service). It's the shop manual for your car.

JEPC (Jaguar Electronic Parts Catalog), This is what the parts counter guy at the dealership uses to order parts. Nothing on repair but better and more exploded diagrams so you can see how things go together.

I don't find the JTIS to be very detailed and have seen much better manuals but that's all we get. That's even gone for the later model cars (XF) and you have to buy a web based subscription to get the repair/service info.
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