Drivetrain Cam Swap.
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Joined: Mar 2008
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From: Lake forest, California
Cam Swap.
While swapping my cam last night I made a few oversights.
Due to the late night nature of the work, i made a few skips...
I Tightened the rocker shafts in the wrong order. i tightened from the outside in. and brought the shaft down evenly.
But alas i did not have a Tq wrench. so i tightened it down pretty heartly.
Im worried about the concequences of over tightening the bearing caps on this car. if it would crush my awesome new cam.
I would have run out and bought a tq wrench but it was 905 at night and sears had just closed so i evenly tightened it down and hoped.
for the bearing caps and everything else from there on out till the car was fully installed.
I did to the break in process where i held the revs at just over 3K for about 4 minutes at 11:19Pm much to the unhappiness of my friends neighbors.
I know i sound like i have no business doing this but i was unaware of the fact there was no Tq wrench.
So what I'm asking is Is this fine to leave how it is. or Should i disassemble the car and then re assemble the car and re Tq it to specs?
i don't want to have to pull the car down but i also don't want to have to have a cam or something worse go belly up on it.
Let me know what you think.
colin
Due to the late night nature of the work, i made a few skips...
I Tightened the rocker shafts in the wrong order. i tightened from the outside in. and brought the shaft down evenly.
But alas i did not have a Tq wrench. so i tightened it down pretty heartly.
Im worried about the concequences of over tightening the bearing caps on this car. if it would crush my awesome new cam.
I would have run out and bought a tq wrench but it was 905 at night and sears had just closed so i evenly tightened it down and hoped.
for the bearing caps and everything else from there on out till the car was fully installed.
I did to the break in process where i held the revs at just over 3K for about 4 minutes at 11:19Pm much to the unhappiness of my friends neighbors.
I know i sound like i have no business doing this but i was unaware of the fact there was no Tq wrench.
So what I'm asking is Is this fine to leave how it is. or Should i disassemble the car and then re assemble the car and re Tq it to specs?
i don't want to have to pull the car down but i also don't want to have to have a cam or something worse go belly up on it.
Let me know what you think.
colin
2nd Gear
Joined: Mar 2008
Posts: 108
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Problem is that when you have bolted the cam caps on you may have over done them therefore you will have stretched the bolts, so if you strip it down again and use a torque wrench to rebuild then the bolts still won't be to the correct torque.
If it was me I would buy a new set of bolts and fit them with a torque wrench (also check that the cam caps are not crushed in any way)
If it was me I would buy a new set of bolts and fit them with a torque wrench (also check that the cam caps are not crushed in any way)
Last edited by Jaw_F430; Jun 15, 2008 at 05:53 AM.
6th Gear
Joined: Jan 2007
Posts: 3,362
Likes: 1
From: Winston-Salem, NC
Problem is that when you have bolted the cam caps on you may have over done them therefore you will have stretched the bolts, so if you strip it down again and use a torque wrench to rebuild then the bolts still won't be to the correct torque.
If it was me I would buy a new set of bolts and fit them with a torque wrench (also check that the cam caps are not crushed in any way)
If it was me I would buy a new set of bolts and fit them with a torque wrench (also check that the cam caps are not crushed in any way)
Go get a tourque wrench and back off the bearing cap bolts in the proper sequence noticing where they break loose. The bolts will likely be ok as they're going into aluminium. However, you can't beat new fasteners! 
Then torque her up and enjoy!
Jeremy
Then torque her up and enjoy!Jeremy
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