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Jaguar xj engine hydro-locked engine

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Old 08-20-2019 | 10:28 AM
Eduardo Miranda's Avatar
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Default Jaguar xj engine hydro-locked engine

My mechanic is saying that they think that the engine was hydro-locked but that they don't have the tools to check it. Is it possible that the engine was hydrolocked and it is only showing this codes?

 
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Old 08-20-2019 | 03:39 PM
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The only tool required to check for Hydro lock is a standard'spark plug wrench. If your mechanic didn't know that the search for
someone different.

The code you've highlighted above does not point to Hydro locking so I wonder what made him or you conclude that that was the problem
 
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Old 08-20-2019 | 03:57 PM
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Looks like injectors to me
 
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Old 08-20-2019 | 04:18 PM
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this is what they told me

Currently the vehicle is not starting, we have some information that points to a hydro-locked engine. Basically a fuel injector blows a large quantity of fuel into a cylinder because of the high pressure system no slowing the flow of fuel into a worn out injector. typically causing a bent rod in the engine, battery power is not the issue.
 
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Old 08-20-2019 | 04:20 PM
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Im not sure how much they looked into it because they didn't even charge me anything.
 
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Old 08-20-2019 | 04:51 PM
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Hydro locking is water in the cylinder, not fuel., Sounds like you got your money's worth from your garage!

Have you at least taken spark plugs out yet?
 
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Old 08-20-2019 | 06:17 PM
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And on a more basic level : What is the symptom? "Not starting" is a useless fault description. Does it crank?

Instead of us having to ask basic questions like this, why don't you start with a proper description of the problem, what has been done to diagnose it, and so on.

"we have some information that points to a hydro-locked engine" What information? Is it a secret?

Sheeesh.
 

Last edited by Mark SF; 08-20-2019 at 06:19 PM.
  #8  
Old 08-20-2019 | 08:50 PM
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You probably should take it somewhere else, like the dealership. You don’t have to have them repair it, but you should have someone diagnose it fully. Otherwise you may be writing off a good car.
 
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Old 08-21-2019 | 06:31 AM
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Like was eluded to, if you are able to crank the car and the motor physically rotates, the motor is not "hydrolocked". If the motor was hydrolocked, you should attempt to start the motor and only hear a single click (granted, this can point to a host of other things).

A trick that you can try is if it is bad injectors, you can try depressing the gas pedal all the way to the floor, hold it there, as you attempt to start the car. This should cause the fuel injectors to not admit any fuel (minimal if they are leaking) and after about 5 seconds of the engine cranking, you can ease off the gas to allow the fuel injectors to again admit fuel to the engine. At this point the engine should want to start.

Based on the codes, you have either an injector problem on the bank2 side of the engine or the coils associated with bank2 are having an issue. Either way, the shop that you initially took the car to either is trying to get you to spend lots of money for a relatively easy job on their part (ie, replacing the engine, which is what would be needed most likely if you truely have a hydrolocked engine due to bent components inside the car) or they simply do not want to work on your car and am telling you something to make you go find someone else.
 
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Old 08-21-2019 | 10:37 AM
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IMHO the low fuel pressure code seems to suggest a bad fuel injector or pump. My recollection is that there is a coil for each cylinder on this car, thus it seems unlikely that all 4 coils on bank 2 went bad at the same time.

All the best.
 
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Old 08-21-2019 | 10:44 AM
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This is what the other mechanic said:

Found vehicle to be a no start/no crank on arrival. Checked
and found the main 400 amp fuse blown.
Tested the circuit to the starter for a short and none found.
On further inspection found the engine hydrolocked.
Removed all 8 spark plugs and found cylinder 4 full of fuel.
Suspect the injector failed and flooded the cylinder.
Need to replace the #4 injector, spark plugs, the main fuse
and perform an oil change. Clear codes and recheck
operation.
 
  #12  
Old 08-21-2019 | 10:47 AM
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Originally Posted by Eduardo Miranda
This is what the other mechanic said:

Found vehicle to be a no start/no crank on arrival. Checked
and found the main 400 amp fuse blown.
Tested the circuit to the starter for a short and none found.
On further inspection found the engine hydrolocked.
Removed all 8 spark plugs and found cylinder 4 full of fuel.
Suspect the injector failed and flooded the cylinder.
Need to replace the #4 injector, spark plugs, the main fuse
and perform an oil change. Clear codes and recheck
operation.
If you’re lucky the cylinder filled when it was off and because it couldn’t crank caused no damage to the engine. Thanks for following up.
 
  #13  
Old 08-21-2019 | 11:04 AM
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Is there any way of knowing if there was any damage to the engine before changing all of that?
 
  #14  
Old 08-21-2019 | 11:59 AM
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Originally Posted by Eduardo Miranda
Is there any way of knowing if there was any damage to the engine before changing all of that?
Others can probably provide more direct ways to diagnose this, but at minimum I would suppose you could remove the extra fuel from the cylinder and then see if the engine now cranks smoothly.
 
  #15  
Old 08-21-2019 | 01:05 PM
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Your first post was this :

"My mechanic is saying that they think that the engine was hydro-locked but that they don't have the tools to check it. Is it possible that the engine was hydrolocked and it is only showing this codes?"

Here's what the mechanic actually said :

"Found vehicle to be a no start/no crank on arrival. Checked
and found the main 400 amp fuse blown.
Tested the circuit to the starter for a short and none found.
On further inspection found the engine hydrolocked.
Removed all 8 spark plugs and found cylinder 4 full of fuel.
Suspect the injector failed and flooded the cylinder.
Need to replace the #4 injector, spark plugs, the main fuse
and perform an oil change. Clear codes and recheck
operation."

I will leave everyone to come to their own conclusions.
 
  #16  
Old 08-21-2019 | 01:07 PM
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They are different mechanics, the first didn't do anything and he recommended me the other one.
 
  #17  
Old 08-21-2019 | 01:47 PM
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Sounds like the second mechanic has taken the appropriate steps, and you should follow his recommended course of action.
 
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