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Discussion Starter · #1 ·
Hey fellow piloteers,

I got down to the underbelly of the pilot today and saw a massive oil leak spilling over the oil pan and the passenger-side frame. There is oil above the oil pan so it's not a leak from the oil pan or the drain plug.

Is it the from the VVT/sppol filter next to the oil filter housing? The oil filter housing is dry when looking from the passenger side tire. There is oil spill under the belt on the main pulley.

Anyhow, I included a few photos taken today and I hope to get some input from piloteers before tackling the problem. The pilot in question is a '07 EXL with 192K miles.

btw I also noticed the power steering pipe is severely rusted and I will replace it when I take the tire off.
Automotive tire Gas Rim Electric blue Metal
Automotive fuel system Automotive tire Vehicle brake Automotive exterior Motor vehicle
Automotive tire Automotive lighting Tire Motor vehicle Hood
 

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Nobili spiritus embiggens pequeño sparus tyre.
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FWIW, I concur. The VTEC (Yo!) spool gasket would be my first suspect.

BTW, good of you to label of few things in your pictures (y), since it helps the viewer get his bearings faster. Everybody should do that when what you're looking at isn't dead obvious.

IIRC, @Nail Grease is big on the VTEC spool gasket, so it'll be good when he chimes in as well.
 

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2019 EX AWD
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If not sure what the source of leak is I would try oil UV dye. Few years ago I tried one to locate refrigerant leak and it worked great (it was minor ac compressor seal leak I would have never located without it).
 

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It looks like you have your diagnosis, but also check the rear main seal. That's a common source of leakage here, that doesn't normally get fixed because it requires disassembling a lot of the engine. Also AT-205 to keep it manageable.

--Chris N.
 

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What I would suspect from looking at that would be a crank seal. I've got an oil leak that looks similar to that and mine was the crank seal. It looked like it was leaking during a timing belt change, but I didn't have the seal at the time to install so I skipped it and regret it every day; gotta undo the timing belt again to get it changed out. Mine leaks pretty bad losing about 0.5 to 1 qt per 500 miles just from the crank seal plus can smell the oil burning as it goes on the exhaust pipe.
 
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Nobili spiritus embiggens pequeño sparus tyre.
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Also AT-205 to keep it manageable.
Sure does, if it's not too far gone. Post where you locate some, as it's hard to find these days.

Over to you, Scotty. :)

 

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2007 Pilot EXL, 2012 Civic LX, 2007 VTX1300C
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sometimes PS fluid can leak down there making it appear to be engine oil. good to replace that spool valve gasket though anyway because at that mileage it will be trashed as mine was completely hardened. check your PS hard line along the frame it looks like it needs replacing
 

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Glorificatus Oleum Mutante
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With age, this engine will begin to leak oil from most all the places it can.
  • Valve cover gaskets grommets and spark plug tube seals
  • PCV valve
  • Cam seals (2)
  • Front main seal
  • Oil pump with oil hole gasket, oil pump is sealed using Honda Bond or a gasket maker (I use Permatex Ultra Black)
  • Oil pan is sealed using Honda Bond or a gasket maker
  • Oil filter housing gasket (spool valve gasket)
  • VVT solenoid gasket
  • Main bearing cap bolts
  • Cam Thrust cover gaskets (2)
  • Rear main seal
  • Rear main cover plate with O-ring gasket, sealed with Honda Bond or gasket maker
Wood Sleeve Gesture Knee Floor
 

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Looks like mine at similar mileage. Ended up having to reseal the oil pump, which requires taking the timing belt off.
You are at the mileage and age where you could knock out both at once.
Search the forums, I posted on it a while ago Has Anyone actually done the oil pump reseal?
There are some YT videos on how to do it, as well as some writeups on the RL forums. While you have it all apart replace the spool gasket, as you'll have to take that all off anyways. It will likely be hard and brittle.
 

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Looks like mine at similar mileage. Ended up having to reseal the oil pump, which requires taking the timing belt off.
You are at the mileage and age where you could knock out both at once.
Search the forums, I posted on it a while ago Has Anyone actually done the oil pump reseal?
There are some YT videos on how to do it, as well as some writeups on the RL forums. While you have it all apart replace the spool gasket, as you'll have to take that all off anyways. It will likely be hard and brittle.
Yes, fun stuff.
This was my experience on my 2012 Crosstour. Much the same. Some photos included.
 

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Discussion Starter · #13 ·
With age, this engine will begin to leak oil from most all the places it can.
  • Valve cover gaskets grommets and spark plug tube seals
  • PCV valve
  • Cam seals (2)
  • Front main seal
  • Oil pump with oil hole gasket, oil pump is sealed using Honda Bond or a gasket maker (I use Permatex Ultra Black)
  • Oil pan is sealed using Honda Bond or a gasket maker
  • Oil filter housing gasket (spool valve gasket)
  • VVT solenoid gasket
  • Main bearing cap bolts
  • Cam Thrust cover gaskets (2)
  • Rear main seal
  • Rear main cover plate with O-ring gasket, sealed with Honda Bond or gasket maker
View attachment 154574
That's a very comprehensive list. Thanks!

I have replaced PCV (right next to the oil stick for this model year) which had oil stain outside it; 3 gaskets in/on top of the oil filter housing. Test driving for ~10 miles seemed to have reduced the leak at least: it used to have oil droplets at the drain plug and now I don't see it.

I still suspect that oil pump is leaking, given that some oil stains are above the oil filter housing. so @RonnieJ Thanks for pointing me to the thread. At the next timing belt change, I will ask my mechanic to replace the gasket inside the oil pump assembly. Speaking of which, is there any way to get it done without dropping the exhaust pipe?
 

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Glorificatus Oleum Mutante
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That's a very comprehensive list. Thanks!

I have replaced PCV (right next to the oil stick for this model year) which had oil stain outside it; 3 gaskets in/on top of the oil filter housing. Test driving for ~10 miles seemed to have reduced the leak at least: it used to have oil droplets at the drain plug and now I don't see it.

I still suspect that oil pump is leaking, given that some oil stains are above the oil filter housing. so @RonnieJ Thanks for pointing me to the thread. At the next timing belt change, I will ask my mechanic to replace the gasket inside the oil pump assembly. Speaking of which, is there any way to get it done without dropping the exhaust pipe?
No. The exhaust must be dropped. I'd replace the exhaust flange gaskets too.
 
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