and where did you buy the car from? That dealer? Many times when asking for assistance we're asked was the car purchased and serviced there? water pump is still about the only area or a couple plastic feed pipes I have seen on the SC engine leak from. I have had a couple blown head gaskets and warped heads in the past from customers who said " well I just drove a little down the street to my house/work etc.." Those are easy to spot with a block check test for cumpustion gases in the coolant reservoir

 

You have seen warped heads on these things? New heads then? Wow. I had thought head gasket issues were mostly due to overheating problems when the water pump fails.

 

you dont pull the sc on the 5.0. I was refferring to the 4.2 on that part. Its not that the injectors get carbon IN them, but on the tips.

 

and can I ask where you got that price for injectors? That seems really low for the direct injectors

 

exactly, I thought I said that. Maybe I was thinking it and not typing it My brain works faster than my fingers still

 

I am a tad worried about a head gasket failure. There oil is still a good color, no milk in it but I did get some white some on start up. not a lot, like not near what I have seen on head gasket failures on other cars.

 

that would only be if the leak is to the oil, not into the chamber
a little white is normal and just condensation in the exhaust. wait till its gets cold again and youll see alot more

 

Oh, the injectors you can get from rockauto easily, I found them on a few oem suppliers as well, the price range is 200-300 depending on source.

 

If its in the chamber I think checking the plugs or doing a leak down test would tell me which side the leak was on right? it sucks that the gasket itself is like 85 dollars but its a ton of labor to get to it.

 

LOL, Thats probobly a lot less than Jaguar charges dealers for them.

 

I would do the block check test first before I even went down the plug holes to leak down. Only after if it showed a positive since its way more work. I am surpised they could not find because another great thing about Jaguar coolant is it leaves trace trails that stay and show leaks. where others just evaporate. and youll need more than a $85 head gasket and a couple special tools. But like so many things in life. It was only a $5 oring that brought down a billion dollar space shuttle and lives.

 

Ohno man, if its a head gasket I am leaving that all up to a shop.
I really thought the injectors were in the valley on 5.0 supercharged but I must have been looking at the other engine.
On the pull and replace guide for the injectors, why does it say that the seals can only be exposed to air for 30 min? That is bit rough.
Thanks again for the discussion.

 

weirdly, the 250-300 sources were the parts departments of a couple of dealers.

 

A car with contaminated injectors does not 'suddenly' develop a problem on all eight and cause the engine to quit.

A coolant leak would not contaminate the injectors.

Injector replacement does not cost $8500.

I can appreciate that the dealer appears to be jerking you around but can also understand the OEM's reaction in not offering support at this point. The purchase of a used car with no warranty whatsoever seems to contradict the little I know about Illinois state law.

 

NO they dont Mikey, sometimes it just roughness and no issue. its only when you start getting misfires for cylinder because of injectors. And then jaguar wants the set replaced and all injectors labeled and sent back with fault codes for offending cylinders
through the EPRQ system for investigation. As has been mentioned though is this is not just a jaguar issue but a direct injection issue. great idea and does reduce emmissions and give better performance on less gas. But like so many things in life there are down sides. Just look at all the medicines we have now advertised on TV which will fix what pains you. Then followed by a commercial for attorney ..... that you should call if you have ever taken XYZ drug and experience any of its side affects. pros and cons.

The injectors are not in the valley as on the 4.2 but above the spark plugs and under the cam cover, covers Theyre still a pain because to use the exptractor tools you have to take all the wiper cowl and both cool boxes out of the engine compartment. And a special puller used to extract them and man some are tight as hell and Ive damn near black and blued my hand pulling them.
on the exposed to air. That specifically reffers to the step when you use the sizing tool for the teflon injectors tip seals(never oil or lube, they go in dry ) first size in the tool on one end. let it sit for a bit, then flip it over and put the injector in the smaller end. This sizes the seal and THEN you need to put it in the engine right then because after you take it out it expands again and you risk cutting the enlarged seal installing. hope that gave a little more clarity
Also Jaguar does has given help on different issues. But thats why I asked were you bought the car. If not from that dealer but a independant, Carmax, etc. Jaguar and other manufacturers want to help more when you have purchased and serviced through a dealer network. Its often asked question when we ask for assistance.

 

That's part of why this story doesn't quite make sense. The car went from perfect to undriveable in 450 miles, supposedly due to injectors?

 

Who did you buy the car from?

 

Looking at post 1, nothing about decarbonising.

 

yeah I can see a sticking open injector/s suddenly. That does happen, but the carbon is prograssive to a point then youre done. But then again we dont notice a increase in our waist lines because its slow, just like slowly degrading aprformance. over the years i have fixed suspensions and engines and had customers say the car feels like new and didnt even realised there was a issue. One day you have 6 pack abs, the next you can hold a six pack on your abs.

 

In this case the owner is new to the car. Ostensibly the car ran perfectly on the day of purchase. An engine that is suffering from carbon deposits to the extent described by the OP would not develop the condition in such a short driving distance (450 miles).

No actual diagnosis has been done other then a 'best guess' by a dealer who appears to have taken a shotgun approach.