Xterra Catalytic Converters
- Adam
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Xterra Catalytic Converters
How common is it for the catalyst to break off on the manifold mounted ones and get sucked into the motor? My shop that is swapping the engine says one of the cats is damaged and it likely scored the cylinder walls.
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- Snafu
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Re: Xterra Catalytic Converters
How the hell can the exhaust suck the catalyst into the engine???
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- Adam
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Re: Xterra Catalytic Converters
I googled it. Apparently it is true. I saw it and it has some chunks missing and they are nowhere to be found...
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Re: Xterra Catalytic Converters
If the catalyst is physically broken, then yes, that is a possibility.
I have seen it multiple times.
Exhaust pulses as the engine goes through its 4 cycles.
During that moment it pulses, there is negative pressure in the exhaust.
Being a manicat, the catalyst material is right there at the engine, and can be sucked back into the engine.
To tell how badly, you could do all the work of pulling the head, or trying to look with a borescope through the spark plug hole.
I have seen it multiple times.
Exhaust pulses as the engine goes through its 4 cycles.
During that moment it pulses, there is negative pressure in the exhaust.
Being a manicat, the catalyst material is right there at the engine, and can be sucked back into the engine.
To tell how badly, you could do all the work of pulling the head, or trying to look with a borescope through the spark plug hole.
- Snafu
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Re: Xterra Catalytic Converters
Well I'll be...
Do a compression test?
Do a compression test?
Worlds Greatest Acronym:
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RIP - Keyser - July 2000 to September 2010 - hope we were as loyal to you as you were to us.
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RIP - Keyser - July 2000 to September 2010 - hope we were as loyal to you as you were to us.
- Adam
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Re: Xterra Catalytic Converters
I already know two of the cylinders on that side have low compression. Going to source an aftermarket cat and move on. The old engine actually ran well, just burnt a ton of oil.
There is more stupidity than hydrogen in the universe, and it has a longer shelf life. -Frank Zappa
- Morpheus
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Re: Xterra Catalytic Converters
Scored piston walls will cause high oil consumption.
Burning oil causes plugged cats
It's a vicious cycle
Burning oil causes plugged cats
It's a vicious cycle
- Adam
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Re: Xterra Catalytic Converters
I probably made it worse by just driving it anyway. I had to add about a Liter of oil every 200km haha. I was starting to just put the used oil from my pathfinder in it.
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Re: Xterra Catalytic Converters
Wow, that's almost as bad as my old jeep. 5L per tank of gas... (I went through as set of spark plugs in a week.)Adam wrote:I probably made it worse by just driving it anyway. I had to add about a Liter of oil every 200km haha. I was starting to just put the used oil from my pathfinder in it.
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Re: Xterra Catalytic Converters
Crap that sucks. The truck is awesome. Is there compatible engine swap?
- Adam
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Re: Xterra Catalytic Converters
I purchased a used VG33ER engine from someone in this group that is getting put in tomorrow. I had it compression tested before and I got to hear it run in the truck before it was pulled.
It burned way less if you only drove in the city and kept your foot out of the pedal. But I drove it to work for 3 days and on the third day, the dipstick was dry. I was driving 30k one way at that point...
It burned way less if you only drove in the city and kept your foot out of the pedal. But I drove it to work for 3 days and on the third day, the dipstick was dry. I was driving 30k one way at that point...
There is more stupidity than hydrogen in the universe, and it has a longer shelf life. -Frank Zappa
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Re: Xterra Catalytic Converters
Yup, Titan's are known for this one too. Nissan manifolds are the gift that just keeps on giving.Adam wrote:How common is it for the catalyst to break off on the manifold mounted ones and get sucked into the motor? My shop that is swapping the engine says one of the cats is damaged and it likely scored the cylinder walls.
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- Adam
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Re: Xterra Catalytic Converters
My pathfinder never had this problem. Then again it has only 1 cat and it probably passes with the same cleanliness as an X that has 4.
There is more stupidity than hydrogen in the universe, and it has a longer shelf life. -Frank Zappa
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Re: Xterra Catalytic Converters
To Nissan.Miner wrote:Nissan manifolds are the gift that just keeps on giving.
- Adam
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Re: Xterra Catalytic Converters
As a (not so) funny side note. The "new" engine had aftermarket manifolds, and one was already cracked. I made the choice to have them reuse the manifold from the old motor. We will see if that bites me in the ass or not. If I had the extra 500 dollars in the budget for this thing I would have just bought headers.
There is more stupidity than hydrogen in the universe, and it has a longer shelf life. -Frank Zappa
- Adam
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Re: Xterra Catalytic Converters
Update, the truck is done. It runs great and instead of putting a new cat in I just hollowed out the bad one and will put headers on it at some point. No need to worry about the e test as I got it to pass before the swap...
Cost me a little more than I wanted but it has a new clutch, all new gaskets, oil pan, belts, etc. Body is mint so that is the only reason I proceeded.
Cost me a little more than I wanted but it has a new clutch, all new gaskets, oil pan, belts, etc. Body is mint so that is the only reason I proceeded.
There is more stupidity than hydrogen in the universe, and it has a longer shelf life. -Frank Zappa
- Snafu
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Re: Xterra Catalytic Converters
Good to hear!
Worlds Greatest Acronym:
A.D.O.S.S: Attention Deficit Oooooo Something Shiny! (thanks Simon!)
RIP - Keyser - July 2000 to September 2010 - hope we were as loyal to you as you were to us.
A.D.O.S.S: Attention Deficit Oooooo Something Shiny! (thanks Simon!)
RIP - Keyser - July 2000 to September 2010 - hope we were as loyal to you as you were to us.