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Old 04-29-2021, 01:52 PM   #1
Rmkuper
 
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CAM Pin broke/pushed into CAM core GPI VVT

This is the latest issue on my VVT CAM install on my L99. Apparently I did not get the CAM dowel pin aligned properly with the CAM phaser/gear this damaged the dowel pin causing the cam to spin freely when I try to remove it. Has anyone ran into this issue before? I'm considering putting a couple 1/4 steel rods throught the hole just above the cam under the timing chain cover(picture attached)to hold the CAM still so I can get it off. I don't like the idea but not sure what else I can do...

Hopefully someone has ran into this before....

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Old 04-29-2021, 04:18 PM   #2
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No, no issues here with a 2015 install.
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Old 04-29-2021, 07:28 PM   #3
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put the pushrods and rocker arms on and snug them down. That will help hold the cam in place. THen use an impact gun to remove the cam gear/phaser bolt.
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Old 04-29-2021, 08:55 PM   #4
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put the pushrods and rocker arms on and snug them down. That will help hold the cam in place. THen use an impact gun to remove the cam gear/phaser bolt.
That's what GPI recommended. I ended up taking rockers off spinning it a few times to get the lifters in the tray. Used a 18V not a air gun. Set it to lowest setting am made my way up to high pressing the trigger for about 1 second after about 8 times it spun loose. Now I just have to put the dowel rods in the oil channels to hold the lifters in, pull the cam reset the dowel pin and make sure I don't miss the hole in the cam phaser/gear.

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Old 04-29-2021, 08:57 PM   #5
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No, no issues here with a 2015 install.
So tell me how did you go about verifying the down pin was inserted properly in the cam phaser/gear because you can't see it. Or did you go with a 3bolt?

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Old 04-29-2021, 09:32 PM   #6
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That's what GPI recommended. I ended up taking rockers off spinning it a few times to get the lifters in the tray. Used a 18V not a air gun. Set it to lowest setting am made my way up to high pressing the trigger for about 1 second after about 8 times it spun loose. Now I just have to put the dowel rods in the oil channels to hold the lifters in, pull the cam reset the dowel pin and make sure I don't miss the hole in the cam phaser/gear.
Nice save man. Glad you seem to be on the road to recovery. I can't even begin to imagine the stress this is causing you. You have a bunch of people rooting for you and a successful first start.
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Old 04-29-2021, 10:00 PM   #7
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Nice save man. Glad you seem to be on the road to recovery. I can't even begin to imagine the stress this is causing you. You have a bunch of people rooting for you and a successful first start.
Thanks brother I need all the I can get. By the end of this I'm going to have the best how NOT to install a CAM video on the internet.

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Old 04-30-2021, 03:44 AM   #8
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for sure. Makes me glad I paid a good shop to do mine. lol. And I would definitely keep the vvt.
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Old 04-30-2021, 05:35 AM   #9
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Thanks brother I need all the I can get. By the end of this I'm going to have the best how NOT to install a CAM video on the internet.

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Lol. Keep at it though. The results are very much worth it
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Old 05-01-2021, 09:25 AM   #10
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So my buddy wants to tack weld the cam dowel pin to the phaser gear. What are your thoughts on this? Said it will insure alignment and help the pin stability. What are the thoughts on this? I feel like it will be tough to get the timing chain back on.

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Old 05-01-2021, 02:20 PM   #11
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If that was what is needed it’d come from factory like that.
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Old 05-04-2021, 12:01 AM   #12
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How'd you figure out it was the dowel pin? If you tack weld the gear to the cam, the gear has to be perfectly perpendicular to the cam at all angles. Or else the gear could have a slight wobble that could cause engine damage when spinning at max RPM. I don't think it's a good idea to tack weld. You don't want to chance it.
Be careful when doing the dowel rod trick. I had 2 wood dowels all the way in on my L99 cam swap and 2 lifters passed the dowels and started to fall. Luckily I saved it, but remember that the dowels are not fool proof. I was using 5/16" round wood dowels.
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Old 05-04-2021, 09:23 AM   #13
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Haven't heard from you in a while how's everything going?
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Old 05-04-2021, 09:31 AM   #14
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Quote:
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How'd you figure out it was the dowel pin? If you tack weld the gear to the cam, the gear has to be perfectly perpendicular to the cam at all angles. Or else the gear could have a slight wobble that could cause engine damage when spinning at max RPM. I don't think it's a good idea to tack weld. You don't want to chance it.

Be careful when doing the dowel rod trick. I had 2 wood dowels all the way in on my L99 cam swap and 2 lifters passed the dowels and started to fall. Luckily I saved it, but remember that the dowels are not fool proof. I was using 5/16" round wood dowels.
He was talking about tacking the pin to the gear then torqueing it down into the cam. Reguardless we did not do that. It's at the machine shop now geting the pin removed and a new one installed. Hope to have it back today.

Troubleshooting I took the cam phaser out. You can see (picture) where it either popped out of the hole on the gear or I never had it lined up correctly.

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