Researching a 204k mile 97 Nissan Quest that's been left sitting for 3 years because of a cooling leak that seems to be dripping above the oil filter. It's currently a crank no start, but I would like to make sure the cooling system is sealed before tackling that issue.
The coolant reservoir tank was empty so I added half a gallon of distilled water before using a pressure tester. It initially dripped below the oil filter, but I think it finally bridged below the crank pulley because I jacked the front to get a better view.
It's still too tight & dark a space to definitively find the location of the leak so I uploaded a clip ( https://streamable.com/w97ti7). Around the 16 sec mark, I have noticed a wiring harness that's looks moist so I'm not sure I'd that could've been from the c shaped hose above, but there was a drip around the 36 sec mark. I didn't feel any wetness from the coolant hoses though.
According to the owner, the water pump along with the timing belt was replaced around 140-170k. He has driven it for months after, but then didn't drive it as much. He stopped driving it when he noticed the leak so it's been sitting for years.
I think it might be this ( https://repairpal.com/coolant-leak-from-plug-behind-timing-cover-335) :
"Coolant Leak From Plug Behind Timing Cover on Nissan Quest
Problem Description
A coolant leak may develop from a plug on the front of the rear cylinder head, behind the timing cover."
I haven't seen YouTube videos about fixing just that plug or if that part is even available. I don't even know what it looks like. Any one have videos or pictures if it?
I've read about coolant leaking from the timing cover, but some have reported that even after replacing the water pump, it still leaked. I know that there is a possibility that the new water pump replacement croaked, but what are the odds? Looking up YouTube videos, the first one that pops up is a faulty bypass hose (uploader initially replaced water pump as well), but that was for a Q. Hopefully the clip will give better data for someone who has experienced this issue. Thanks.
Stop guessing with expensive parts -
For the crank no start -
https://carkiller.com/scottykilmer/qa/nostart/
While I do appreciate he expediency of your reply, it was more of a generalized answer. I was hoping for a more specific direction from someone who might've experienced the same problem with this or a Villager. That's why I tried getting a video clip to show the location of the leak while trying to avoid coolant drops on me & my phone while crawling under it. There wasn't a better perspective since I'm only a diyer & don't have a lift or better lighting. I'm trying to avoid guessing that's why I asked & being prepared for possible worse kinds of scenarios should be a staple in fixing cars as things don't usually go as planned.
Best case scenario, the lip on the bottom part of the c shaped bypass hose isn't sealed tight enough by the clamp when it was reinstalled on the thermostat housing. Both that & the upper radiator hose didn't feel wet underneath.
In-between, the plug behind the timing cover. I've only seen videos of the outer timing cover removal when changing the belt & water pump so I don't know if repairpal comments were saying there's a plug after the inner timing cover removal & what does it look like? People have complained that even after water pump replacement, there was still leaking.
Worst case, the coolant leaked from the water pump which then soaked the timing belt as well because of the stupid hidden design. In that case, the water pump, timing belt, & might as well replace the thermostat since everything's out.
I do like watching Mr. Kilmer's videos. Already seen the coolant leak & crank no start videos a while back, but there are other circumstances not covered, that's why I was hoping Mr. Kilmer or somebody else that's fixed this specific problem could've answered. Fixing cars is admittedly a huge PITA, but you can only learn if you study & ask someone with experience if you don't know. That's why I did. I'll only tackle the no start after I figure out what to do with the coolant leak first. Thanks.
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The parenthesis & period are accidentally included when clicking. Please try again.
Hard to see, but maybe your coolant temp sensor is loose.
