[Jim_S-V6_2004]

Uuuurrrmmm....

I would avoid any additive for now in any case.

I've used an oil additive about 3 years ago to stop an oil leak, and it worked. That one expands the seals, I got it from Euro car parts.

I can't remember how long it took but it wasn't long, maybe a few days or a week at most before there were no more new drips on the driveway.

If you're going to use a thicker oil now, you don't need any additive, do one step at a time.

How's your coolant level etcetera?

Winter is a testing time for batteries and heating systems, summer is a testing time for ACs and coolant and radiators and expansion tanks.

And brakes!

Good time to replace your brake fluid if you have some time, use a Gunson's pressure bleed kit, very easy and quick.

It's also a good time to flush out and replace your coolant with fresh mix. You might be surprised at the improvement. Don't use any cheapo, get one that complies with Jaguar's recommended one.

Tune in later for another episode of Jim's advice for the Unsuspecting Motorist..

 

[bilzerian]

Then I guess I'll just go with the thicker oil, and maybe add the additive later, I'm just curious if it does something at all, or it's just placebo...

Coolant level is fine, but I have a minor leak (I just top it up once or twice per month with premixed coolant) that should be addressed any soon... also the heater valve is not working properly... so I was planning to fix the leak, flush the coolant with some quality stuff (yellow, now it's redish), and replace the heater valve at the same time, this I can do it by myself, seems an easy job.

Battery is fine now (after it died a couple of months ago, I was playing some music while replacing one of the CV axles and filling the diff with oil... not a very smart idea, since it took me a couple of hours...), but I'm planning in changing it soon.

Thanks for all the good info,I really appreciate it

 

[ducmon]

If it the same antifreeze as my car uses it should be red. Check before you buy it, don't mix them or you will get a a clumpy too that can block the water ways.

 

[Jim_S-V6_2004]

If it the same antifreeze as my car uses it should be red. Check before you buy it, don't mix them or you will get a a clumpy too that can block the water ways.

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Yes, I agree.

Drain the old coolant out by opening the drain plug under the radiator.

Check the radiator very well, especially the bottom to see if it is bulging, this is where they corrode and burst.

Then use the garden hose and flush out all the old coolant. You can fill the system completely and run the engine for a minute to wash out the "corners" . Then stop the engine and empty the system and wash out again.

Then refill with fresh RED mix of the type recommended.

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[bilzerian]

Update: So I replaced the engine oil (Castrol C1 - recommended by Jaguar) and filter yesterday. The difference is very noticeable, much smooth, the deep "knock knock knock" almost completely disappeared!

It's still noisy, but the noise is coming from the accessories (drive belt, tensioner, etc) and not the engine... I should probably start by replacing the drive belt and its tensioner (two tensioners from what I can see: JDE11364, and C2C22802).

Thanks everybody!

 

[Jim_S-V6_2004]

When you changed the previous oil what did you use?

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[bilzerian]

About 6k miles ago using Motul EcoTec 5w30, it's more expensive than Castrol, and I thought it would be better.

 

[ducmon]

Thanks for the update. Interesting result showing that the recommendations of the manufacturer do sometimes have positive results and cost less.

We will have to wait and see how long this functions.

 

[ChopTank]

I seem to have that as well... when car warms up a gentle knock knock knock... More noticeable when the car is stationary... Also if you remove the air filter cover just the clips and lift it one side, it will be louder and more noticeable... Don't know what it is.... As I have the air filter cover slightly lifted and out of place to let more air in... I notice it... But when i close the filter cover completely its not noticeable.

Not an expert on this, but doesn't having the air filter cover afar muck up the MAP Sensor?

 

[AliasFaux]

Not an expert on this, but doesn't having the air filter cover afar muck up the MAP Sensor?

Not sure but it seems to help low end torque and car seems to have more power and pick... Maybe because it's able to suck in more air? Not sure but works better for some reason. Time will tell when the next f up happens I guess 😂😂😂

 

[Jim_S-V6_2004]

About 6k miles ago using Motul EcoTec 5w30, it's more expensive than Castrol, and I thought it would be better.

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The hot spell would have thinned the oil.

Now the cool spell will return things to normality.

And there's another hot spell coming.

All change!!

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[pcspinheiro]

Sorry, I know this is an old thread, but did the problems completely go away just by changing the oil? I may have somewhat similar symptoms, with a lumpy cold idle and noisy/knock-y on warm. Does not seem to smoke at all and pulls away fine - at least it seems so, I don't really know these cars well and what to expect from them - cruises on highway with low fuel consumption (trip computer). I just bought new oil and filters but I only had the choice of Shell, Elf and Ford motorcraft. Went with the Elf since it was something-something-D compliant. Let's see. I'll inspect injectors next. Must get acquainted with the car (have it only for 4 days now, been garaged all the time) and what better way than to start taking it apart?

 

[ducmon]

Just give the car a service. Change oil, filter and do not forget the diesel filter.

You will amazed how often the fuel filter is forgotten.

If it is possible get the DPF cleaned (if you have one that is).

When they get blocked with old ash it can cause a lack of performance.

So off you go to the local DIY workshop and get checking.

Your imagination is saying it is worse than it is most probably is.

 

[pcspinheiro]

I know, I know. I tend to see the worst case scenarios and hopefully be positively surprised... And I did forget to buy the fuel filter, damn it! I'll get one from a local parts store.