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Hey all, longtime lurker first-time poster. Great site and community here!
1999 Honda Odyssey with 167k miles.
I'm in the middle of changing my timing belt as I've been getting a rattle/ticking sound when it's cold out and it's definitely coming from the inside the timing belt cover, and reading around here I diagnosed it as a failing hydraulic belt tensioner. Which is what it looks like after I got the cover off (yay, I think I was right!).
But here is where it gets interesting, when I jacked up the Ody to start the work on the timing belt I noticed oil on the bottom of the pan which has never been there before. I do all my own maintenance and changed the oil 3k miles ago and there were no leaks at that time, so I assume it has something to do with the cold causing a seal to start weeping. It was dripping down the passenger side of the pan from the timing belt area so when I first started the work I assumed it was the crank seal and I would change it along with the other parts (easy), but now that I have the timing belt cover off I see the oil comes from above the crank, kind of in front (towards the bumper) of the water pump and works its way down through the lower timing belt area. After reading around here and other places I now think it's the oil pump gasket or something related to the oil pump as that's pretty much the only source of oil leaks above the crank apparently.
Questions: Should I be able to change the gasket and reuse the pump and all other related parts or should I replace the whole oil pump assembly? What parts should I change so I don't have to worry about this coming back after I button it all up?
Here's a link with the oil pump assembly diagram: OIL PUMP - OIL STRAINER Honda OEM Parts -- 1999 HONDA ODYSSEY for 5DR EX - Automatic
I'm also attaching pictures of my leak behind the timing belt cover.
Thanks,
-EW
1999 Honda Odyssey with 167k miles.
I'm in the middle of changing my timing belt as I've been getting a rattle/ticking sound when it's cold out and it's definitely coming from the inside the timing belt cover, and reading around here I diagnosed it as a failing hydraulic belt tensioner. Which is what it looks like after I got the cover off (yay, I think I was right!).
But here is where it gets interesting, when I jacked up the Ody to start the work on the timing belt I noticed oil on the bottom of the pan which has never been there before. I do all my own maintenance and changed the oil 3k miles ago and there were no leaks at that time, so I assume it has something to do with the cold causing a seal to start weeping. It was dripping down the passenger side of the pan from the timing belt area so when I first started the work I assumed it was the crank seal and I would change it along with the other parts (easy), but now that I have the timing belt cover off I see the oil comes from above the crank, kind of in front (towards the bumper) of the water pump and works its way down through the lower timing belt area. After reading around here and other places I now think it's the oil pump gasket or something related to the oil pump as that's pretty much the only source of oil leaks above the crank apparently.
Questions: Should I be able to change the gasket and reuse the pump and all other related parts or should I replace the whole oil pump assembly? What parts should I change so I don't have to worry about this coming back after I button it all up?
Here's a link with the oil pump assembly diagram: OIL PUMP - OIL STRAINER Honda OEM Parts -- 1999 HONDA ODYSSEY for 5DR EX - Automatic
I'm also attaching pictures of my leak behind the timing belt cover.
Thanks,
-EW



