If not water pump, then what? X351 3.0
#21
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Is there anything behind the front engine plate that would leak? I believe all that is there are the crank, sprockets, chains and oil seals. All the cooling stuff if above that, correct?
BEFORE I REASSEMBLE: Please let me know if you have any other opinions or ideas as to where this leak may originate. Are there any hoses, tubes, outlets. or gaskets I can expose and inspect without the pressure test?I would like to eliminate the top of the engine as a source of the leak.
BEFORE I REASSEMBLE: Please let me know if you have any other opinions or ideas as to where this leak may originate. Are there any hoses, tubes, outlets. or gaskets I can expose and inspect without the pressure test?I would like to eliminate the top of the engine as a source of the leak.
I'm in this same identical situation. I did not do a leak down test. All the usual suspects for coolant loss are fine, don't show any failure.
I'm considering reassembling the car and pressure testing from there, hoping that the water pump although it does not look like it failed was the culprit (or gaskets on the plastic tube behind it).
#22
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What was the outcome for you?
I'm in this same identical situation. I did not do a leak down test. All the usual suspects for coolant loss are fine, don't show any failure.
I'm considering reassembling the car and pressure testing from there, hoping that the water pump although it does not look like it failed was the culprit (or gaskets on the plastic tube behind it).
I'm in this same identical situation. I did not do a leak down test. All the usual suspects for coolant loss are fine, don't show any failure.
I'm considering reassembling the car and pressure testing from there, hoping that the water pump although it does not look like it failed was the culprit (or gaskets on the plastic tube behind it).
First was the cooling line going to the front of the water pump: The plastic nipple that inserts into the WP had worn off to the point it was several cm too short and could not be held by the retainer clip inside the hole (which also was defective) of the WP.
Second: I found a minor leak on the hose to/from reservoir tank. The “O”-ring inside gray plastic connector on the line from the reservoir (part shown) had failed. It leaked just enough to leave the sweet smell of coolant on a daily basis and eventually, in stealthily way, it sucked and dripped coolant that convinced you it was the water pump. Through trial and error I eventually found the issue and bought some generic o rings, replaced the faulty one and smeared a little silicone around the interior of the gray part and a light coat around the o-ring nipple for good measure and as added incentive to hold coolant. I then let everything sit for 24-36hrs to cure. Also, because I no longer feel confident in a design that screams future failure, I then Zip tied every connection within reach for added holding security. A lot like suspenders plus a belt to hold up your pants. Hope this helps you or someone else.
BTW: I also replaced the WP gaskets, O ring to the oil cooler and the plastic insert. I figured in for a penny, in for a dollar.
Good Luck
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Last edited by Quietgiant; 09-25-2021 at 04:54 PM.
#23
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scotster9822
XJ XJ6 / XJ8 / XJR ( X350 & X358 )
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12-06-2019 12:44 PM
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