hello evryone.
my name is udi i own an xj 2010 5.0L (not supercharged)
i prupobly hade blown one of my head gasket.
as the car oil and water have mixed and the car was shaking badly when i trayd to start it.
the car has 77k mils
i need to rebild the heads now.
i have no cnolege on this spasific engine.
the car is rather new to me.
i have a past whit v8 engeins rebiled but nor this one.
anyting i need to know befor i start to dismantle the heads?
do i need to fix the one head thets gon bad or both of them anyway?
can i do this job whit the engine in the car?
do i need spacil tools?
where can i find information about head bolt thit force?
how mace compresion need to be in the chilinders?
do i need to do the timing chine as well?
any info you can give me will be very helpfull before i start. spacely from some one how have done it.
i even herd thet there are oposite side bolts.
plase help a friend in need.
(very sorry for the bad english)

 

what part do i need to change as well and were can i find good price parts to do this job thet are shiping wordwild?
tanx evryone.

 

Have you had overheating before the head gasket problem. Where in the world are you located ?

 

it did overheat but not alot.
im from israel.

 

You need to be a bit more forthcoming, (sorry !). Overheating is one of the biggest causes of these engines being written off, as bliock warpage can occur. Once that occurs, it is goodby engine, basically. Did the car leak off all its coolant ? Did you drive the car very far after the overheating ?

 

sorry my wife drived the car when it happand.
so i cant know for sure.
ones i gat there there was no water in the tank and when i fell the water and fire it it was wabbling badly
So rhe only way i can be sure is to pull the damage head and inspect the block?

 

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Udiasi, I think the hard part that you are going to find is getting the pieces to bolt stuff back together. There are not a lot of places to buy the repair parts. From what I have seen here, the Jaguar dealership really doesn't even carry parts for the engine. So, your best bet would be to find a wrecked XJ that is from roughly the same year as yours (granted, you should be able to go up to 2012 without any issues) and then do a one for one motor swap. You will definitely not find the parts at your local auto parts store. A lot of members have wanted to do exactly what you are after and found obtaining parts to be a very long and hard search.

Once you have the old engine out, then you can play with pulling it apart and finding parts to rebuild the engine. A good rebuilt engine is going to get top dollar as a new engine through Jaguar is around $42K USD. That price does not include installation. So, even if you got say $25K, that would cover the cost of getting a good used engine, the parts, and leave you a fair amount for your time (assuming you don't have a fatal flaw from overheating).

 

Wait a minute. At this stage all we know is water and oil mixing. So probably a bad head gasket. You can determine where the failure is with a compression test, and/or inspection through the spark plug hole. Bad cylinder might have water in it.

Then you can pull the head in question, and inspect. If you are lucky, all you need is a head gasket. If the head is warped, obviously that is a bigger problem. Talk of new engines is way premature. So, really is talk of rebuilding the heads, at 78K. Normally all I would do is replace the gasket, skim the head, and dress the block carefully to get it smooth.

 

I agree. At least take the head off first and inspect. You can always buy another used engine.
Then check if the head is warped or even usable.
Let us know either way!
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You can visit the website of atlantic british, they have some videos that can help you. Different vehicle but the same engine

https://www.roverparts.com/resources/videos/

 

so i started to take the car apart today.
i took all the plags out and will do tomoro a compasion test to know which head gone bad.
i have some questions doo
1.can it be thet there are water coming in to the oil and not oil in to the water?
the water is clean but the oil is brown color which meen thet water came in.
2. what number of psi i suld look for in cylinders? what is ok and whats not?
3. can water came in the oil in some way other then bad head gasket or warpge off the head or bolck?
tanx for your help!!!

 

Udiasi, the pressure that you will see on a tester is dependent on a lot of variables. Based on the motor you have, assuming the rings are still sealing well, you should be seeing around 150 psi in all 8 cylinders. What you should be more interested in is where a number of the cylinders are reading a high pressure (say 165 psi), then you have 1 or 2 that read low (say 60 psi). that would be an indication that you have a problem with those cylinder(s). As engines wear, the amount of compression you will get, but all the cylinders should drop by the same amount. Hence why you are more interested in all the cylinders reading the same value, not so much what that value is as long as it is a fairly high value.

As for water getting into the oil or oil into the water, this is dependent on where the leak is. The oil as a general rule runs at a higher pressure than the water. But, this is only true on the up stream side of a bearing or other component in the engine. On the downstream side (the side going to the oil pan), that will be at a very low pressure (less than what the water is pressurized to). So, the two can mix either way. As a general rule though, water gets into the oil because most leaks happen at the head gasket and all the oil passages there are at a very low pressure and the water can push its way into the oil.

 

If there was water in the oil, but no other symptoms, I'd think oil cooler failure - but you have rough running.

Shame you didn't inspect the plugs as you took them out, the ones in the affected cylinders often look different - suspiciously clean, or even with coolant on them.

 

i will do the tast and came back whit resolts.
i asks this questions becose all the plags are look the same when i took them out.
no oil no collnet on the plags
thay all dry. i will post a photo later.
many many tanx!!!

 

as i look online for parts i have some issue.
do the head gasket in the supergarg model is the same as the non supercharg?
have anyone have the spacific part no of the 2 head gasket? (2010 xj 5.0l non supercharge)
do any off you have good online shop whit good prices thet ship wordwide thet i can look in to?
tanx.

 

Any chance you can post pictures of the plugs?
Might help?
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can some one plase tell me were is the oil coller located? And how it looks?
Tanx

 

Here are the plugs from the car