cam swap without removing oil pump
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From: toronto ontario canada
cam swap without removing oil pump has anybody done it that way ?
all you have to do is make a line on both the timing chain and timing gear and place the car in to 6th gear (you prabaly have already to remove the balancer) to make sure the crank does not turn and when you install the cam you just line up the mark you have made on the cam gear and the chain
has anybody done it that way or am i just being lazy ?
all you have to do is make a line on both the timing chain and timing gear and place the car in to 6th gear (you prabaly have already to remove the balancer) to make sure the crank does not turn and when you install the cam you just line up the mark you have made on the cam gear and the chain
has anybody done it that way or am i just being lazy ?
What the heck are you talking about? Everybody & their brother knows that you don't have to remove the oil pump to do a cam swap. What's all this about not moving the crank? You need to find TDC, degree the cam & align the sprockets dot to dot, that's it.
You only have to remove the oil pump if your doing a crank sprocket change or a timing chain upgrade.
You only have to remove the oil pump if your doing a crank sprocket change or a timing chain upgrade.
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From: toronto ontario canada
^^ i thought you need to remove the oil pump to see the dot on the timing chain gear on the crank so that you can line up the dots with that and the cam gear
Nah you can see it. just roll the crank over til it shows up. You may need to get a flashlight to look if you dont have adequate lighting where you are performing the swap.
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From: toronto ontario canada
it is strange that he changed just the timing chain , i would of asked the previous owner as to why he changed it but unfortunately he has passed away
Sometimes people swap the stock cams back in after they realized that a 240+ duration was more than what they wanted and were not going to be able to sell the car if it was virtually slower with that cam. I know that when I get down to replace the timing set that the cam is coming out though! I used to change cams like underwear.
Here is the deal, if the timing chain has multiple key ways for advancing or retarding the cam it will have multiple marks on the crank sprocket. You would have to remove the oil pump in order to see which key way the key is in and then line up the top sprocket dot to the correct mark on the crank sprocket for that key way.
Or do like I do, install a degree wheel on the nose of the crank, find TDC #1 with the piston stop, set the degree wheel, and degree the cam in acording to your cam card that should have come with your cam. I degree every cam in even if I can see the dots. You would be suprised how many cams are not exactly were they are supposed to be by just using the dots.
My advise is either degree it in, or if you do not have a degreeing kit and if you are not sure you can do this, then drop the pan down some, pull the oil pump, REPLACE the o-ring, and use the aftermarket bracket for the pick up tube. I can never remember the name of the bracket! Maybe someone on here will chim in with the name. It goes on around the pick up tube and uses two bolts to secure the tube to the pump from both sides. It will help prevent screwing up the o-ring and having leaks there.
Good luck and let us know how it goes.
Or do like I do, install a degree wheel on the nose of the crank, find TDC #1 with the piston stop, set the degree wheel, and degree the cam in acording to your cam card that should have come with your cam. I degree every cam in even if I can see the dots. You would be suprised how many cams are not exactly were they are supposed to be by just using the dots.
My advise is either degree it in, or if you do not have a degreeing kit and if you are not sure you can do this, then drop the pan down some, pull the oil pump, REPLACE the o-ring, and use the aftermarket bracket for the pick up tube. I can never remember the name of the bracket! Maybe someone on here will chim in with the name. It goes on around the pick up tube and uses two bolts to secure the tube to the pump from both sides. It will help prevent screwing up the o-ring and having leaks there.
Good luck and let us know how it goes.
Last edited by Texas_WS6; Mar 29, 2010 at 07:40 AM.
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From: Turnin' Wrenches Infractions: 005
JK, but I don't think I would ever change a timing chain on an LS1 at 75K unless I had been beating the heck out of the car..... Wow! Why so harsh? I would think if it was swapped for routine maintenance reasons, they would have went back with a stocker chain, not a more expensive double roller chain/sprocket. Who knows why? It realy does not matter. Does it?
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From: toronto ontario canada
how does the top dead center method work ?
you place the #1 cylinder at top dead center and the mark on the cam gear should be pointing straight down on to the crank ?
you place the #1 cylinder at top dead center and the mark on the cam gear should be pointing straight down on to the crank ?
Dot to dot is TDC for the first firing position (cyl #1,6), and each 90 degree rotation of the crank follows the firing order (the respective pair of cylinders will be at TDC).
Last edited by squirts11; Apr 1, 2010 at 12:58 PM.
