5.0L Engine coolant leaking from strange location.
#1
5.0L Engine coolant leaking from strange location.
2010 5.0L XK 45k miles,
Got the alert coolant low after starting my car today, popped the hood and noticed dripping coolant
from one of the upper fittings on the hoses in front of the engine passenger side,
could anyone tell me what this part is?
Is there any other cooling hoses/parts I should change while I'm doing this?
Thank you in advance.
Last edited by trkyam; 06-30-2018 at 05:51 AM.
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Queen and Country (07-12-2018)
#6
Of course the best bet would be to obtain the correct hose from parts.com or your favorite US mainland Jaguar dealer selling parts at a discount.
In your original post you asked what other hoses should be replaced. I would say "all". I did that on my 2007 4.2 over the last year (82K miles on odometer currently), and no longer smell coolant in the engine compartment. I also replaced the coolant reservoir and the plastic coolant outlet assembly that holds the thermostat and coolant temp sensor. It's not easy - you have to remove the intake manifold for access to the hose that connects to the engine "valley", as one example.
None of the hoses were obviously leaking or bad, this is a peace of mind issue - not waiting for a leak to happen before taking action. The plastic coolant outlet assembly definitely needed to be replaced as the interior was discolored and the plastic around the thermostat was starting to break. (Of course your 5.0 engine does not have a plastic coolant outlet.)
What is the condition of the engine coolant pump bearing - any fluid leaking from the weep hole?
Last edited by Patrick Wong; 07-06-2018 at 05:33 AM.
#7
Ditto. Plastic cooling system parts age at a pretty consistent rate and I assume yours has spent it's life in a warmer climate that exacerbates the problem. Ten years or 100k due to heat cycles is about the same. The real question is do you want to replace them pell-mell or all at once? I chose to only replace those that are bad as they go bad. On my sons '05 Lincoln LS that turned into a three year saga of replacing anything plastic in the cooling system as it all failed. There is also a huge problem when using the wrong coolant (which I'm sure I did on the LS) which is not compatible with the plastic bits. The end diagnosis from a thread a while back is Ford / Jaguar used several different plastic compositions and none are compatible with one type of coolant. The pink Jaguar stuff is compatible with most and the green Wal-Mart / auto parts place stuff is compatible with very little. The orange GM stuff is horrible...
Google coolant types versus plastic cooling parts for an insightful read. You'll need to find the three letter code for the type plastic you have and see what's compatible. It's a design flaw and an engineers train wreck.
Google coolant types versus plastic cooling parts for an insightful read. You'll need to find the three letter code for the type plastic you have and see what's compatible. It's a design flaw and an engineers train wreck.
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#9
With the original hose, what is the condition of the plastic adapter? If you cannot timely obtain the correct hose, and the plastic is OK, it seems that it would be better to buy two hoses that have the correct inner diameters, and reuse the plastic.
Of course the best bet would be to obtain the correct hose from parts.com or your favorite US mainland Jaguar dealer selling parts at a discount.
In your original post you asked what other hoses should be replaced. I would say "all". I did that on my 2007 4.2 over the last year (82K miles on odometer currently), and no longer smell coolant in the engine compartment. I also replaced the coolant reservoir and the plastic coolant outlet assembly that holds the thermostat and coolant temp sensor. It's not easy - you have to remove the intake manifold for access to the hose that connects to the engine "valley", as one example.
None of the hoses were obviously leaking or bad, this is a peace of mind issue - not waiting for a leak to happen before taking action. The plastic coolant outlet assembly definitely needed to be replaced as the interior was discolored and the plastic around the thermostat was starting to break. (Of course your 5.0 engine does not have a plastic coolant outlet.)
What is the condition of the engine coolant pump bearing - any fluid leaking from the weep hole?
Of course the best bet would be to obtain the correct hose from parts.com or your favorite US mainland Jaguar dealer selling parts at a discount.
In your original post you asked what other hoses should be replaced. I would say "all". I did that on my 2007 4.2 over the last year (82K miles on odometer currently), and no longer smell coolant in the engine compartment. I also replaced the coolant reservoir and the plastic coolant outlet assembly that holds the thermostat and coolant temp sensor. It's not easy - you have to remove the intake manifold for access to the hose that connects to the engine "valley", as one example.
None of the hoses were obviously leaking or bad, this is a peace of mind issue - not waiting for a leak to happen before taking action. The plastic coolant outlet assembly definitely needed to be replaced as the interior was discolored and the plastic around the thermostat was starting to break. (Of course your 5.0 engine does not have a plastic coolant outlet.)
What is the condition of the engine coolant pump bearing - any fluid leaking from the weep hole?
the waterpump weap hole area is dry.
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I had a T fitting on the Lincoln that I turned and welded up as it was cheaper than $179 for the hose and fitting. Plastic looked like gray wool on the inside from using the wrong coolant.
#13
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Where the plastic meets a hose, resist the use of a worm-drive hose clamp as the plastic must be able to expand and contract. Use the constant-tension hose clamps supplied with the OEM hose.
The plastic cooling system parts can only withstand a finite number of cold/hot cycles before failing. Given the age of many of the early production vehicles, the plastic parts should be replaced when the coolant is replaced.
DEXCOOL meets Jaguar specification for OAT coolant.
The plastic cooling system parts can only withstand a finite number of cold/hot cycles before failing. Given the age of many of the early production vehicles, the plastic parts should be replaced when the coolant is replaced.
DEXCOOL meets Jaguar specification for OAT coolant.
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Queen and Country (07-09-2018)
#14
But, this is probably what I'd do. No sense in spending MORE for an inferior OEM part that will undoubtedly just go bad again.
#15
Where the plastic meets a hose, resist the use of a worm-drive hose clamp as the plastic must be able to expand and contract. Use the constant-tension hose clamps supplied with the OEM hose.
The plastic cooling system parts can only withstand a finite number of cold/hot cycles before failing. Given the age of many of the early production vehicles, the plastic parts should be replaced when the coolant is replaced.
DEXCOOL meets Jaguar specification for OAT coolant.
The plastic cooling system parts can only withstand a finite number of cold/hot cycles before failing. Given the age of many of the early production vehicles, the plastic parts should be replaced when the coolant is replaced.
DEXCOOL meets Jaguar specification for OAT coolant.
can DEXCOOL be mixed with the factory coolant?
Thanks
#16
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