Oil Pump & timing chain Question
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Oil Pump & timing chain Question I need some help with a Gen V 5.3l I am working on. My daughters Suburban's camshaft lost oil pressure without any warning. I have gotten the cam out & back in. While I was trying to get the camshaft gear loose, I loosened the oil pump for more space. I know this is a no, no, but it was to late at that point. I noticed when moving the oil pump, the pickup tube did not seem to move with the pump? I think there should be a bolt to remove the pump from the tube, but should the pump move without the pickup tube moving? I really don't want to drop the oil pan as it is a 4wd. Is the oil pump pickup loose, & should there be around a 1/4" space between the 2 parts? I went ahead & set the heads back on the motor with the lifters, but the oil pump concerns me. I can't find a DIY on this motor that shows the pickup tube bolting to the oil pump, so any help would be appreciated.
Thanks
Thanks
The pickup tube is bolted to the oil pump. It slides inside the pump with an o ring to seal it and a bolt to hold it. The pickup tube is bolted to the main support as well if it moves around loose it's broke and may be why you lost oil pressure.
On gen 5 there is no conventional tube or bolt.
The oil pan has a built in pickup and an o ring on the pan that smashes into the pump when you bolt the pan down. That's why you were able to slide the pump back and forth.\
But now the pump will be pushed up by the o ring and may not be down far enough to seal on the o ring.
On gen 5's you're supposed to install oil pump locating tools before removing the pump to put it back in the same spot, it's a weird deal.
I would lightly snug the bolts and watch the pump and try to pry down on it 30 thousandths or so to make sure the o ring is pinched well enough.
Hopefully it didn't get cut or anything moving the pump back and forth, but I've seen where other people said they did the same thing and all was fine after putting it back together and I don't think they put any focus on how far down the oil pump was, just bolted it back and ran it and were fine.
The oil pan has a built in pickup and an o ring on the pan that smashes into the pump when you bolt the pan down. That's why you were able to slide the pump back and forth.\
But now the pump will be pushed up by the o ring and may not be down far enough to seal on the o ring.
On gen 5's you're supposed to install oil pump locating tools before removing the pump to put it back in the same spot, it's a weird deal.
I would lightly snug the bolts and watch the pump and try to pry down on it 30 thousandths or so to make sure the o ring is pinched well enough.
Hopefully it didn't get cut or anything moving the pump back and forth, but I've seen where other people said they did the same thing and all was fine after putting it back together and I don't think they put any focus on how far down the oil pump was, just bolted it back and ran it and were fine.
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I found this out tonight & went ahead & dropped the oil pan. Since The cam lobes were wiped, I needed to clean the inside of the pan anyway. There does not seem to be a lot info on the Gen V motor that can be found, along with no oil pan & timing cover gaskets. I am told to use Permatex to make the seal for both, I really would rather have a gasket! The timing marks are also different on the cam gear with a pencil type line, verses the dots. It took me a few times to get the marks to line up together, but that seems to get people a lot.
When removing the cam shaft gear & pulled the phasor off the gear, is there a trick to get it back on correctly? Hopefully tomorrow I will get the pan & cover back on, & give my daughter her car back.
Thanks for the help & replies!
When removing the cam shaft gear & pulled the phasor off the gear, is there a trick to get it back on correctly? Hopefully tomorrow I will get the pan & cover back on, & give my daughter her car back.
Thanks for the help & replies!
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I pieced the cam phasor spring back together, & got it to hold in place by holding the spring holder while tightening. I think it should have some pins holding it in place, & mine were damaged. Once it was held in place, it seem to seat itself. The only info I could find on the tension, was to turn it clockwise around 1 inch. Mine took a little more than a inch to snap in place, not sure if this will be a problem? I am not really sure what the spring actually does, as many seem to remove them when a cam upgrade is done.
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The RTV instead of gaskets is different but actually works better/lasts longer. So there is good reason for it.
As for the phaser and cam gear and turning things one inch.. I don't know what that all means. The phaser is the cam gear, not two different pieces. A lot of guys put the chain on the gear then put the gear up on the cam, align it with the pin, then tighten down.
As for the phaser and cam gear and turning things one inch.. I don't know what that all means. The phaser is the cam gear, not two different pieces. A lot of guys put the chain on the gear then put the gear up on the cam, align it with the pin, then tighten down.
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The RTV instead of gaskets is different but actually works better/lasts longer. So there is good reason for it.
As for the phaser and cam gear and turning things one inch.. I don't know what that all means. The phaser is the cam gear, not two different pieces. A lot of guys put the chain on the gear then put the gear up on the cam, align it with the pin, then tighten down.
As for the phaser and cam gear and turning things one inch.. I don't know what that all means. The phaser is the cam gear, not two different pieces. A lot of guys put the chain on the gear then put the gear up on the cam, align it with the pin, then tighten down.
When mounting rhe oil.pump, there was not movement t o center the pump. It was tight on the pickup tube seal.
I can't picture it for some reason. the only spring I'm picturing is the timing chain tensioner spring, but that's not on the phaser
I'd have to see what you're working with to say anything about it.
I'd have to see what you're working with to say anything about it.
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What could be causing a huge oil leak from the top rear of the engine, either the high pressure fuel pump, or the intake valley gasket. What ever it is, it must be under pressure. It is coming down from the bellhousing from the top of intake area. I thought it was a valve cover, I changed it with no improvement. My best guess might be the metal gasket on the high pressure fuel pump, but I do not know if it is under oil pressure or not. It is a big leak after a few minutes running the engine. I can't get a good look from the bottom of the engine, but it is pouring oil.
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I did find my big oil leak from the oil pressure plug that is used to access the oil screen, it was not fully tightened. I had oil everywhere under the foam protector for the bottom intake. The oil was leaking off the back of the motor.
Thanks for the help.
Thanks for the help.