[Shotimes] how to change cams?

Adam Parrott Adam Parrott" <parrotta@usa.net
Sat, 19 Feb 2005 09:52:49 -0600


FWIW, Jason, I had 3.0L cams installed into my ATX 3.2L last summer and 
frankly, I haven't noticed that much of a power shift or increase.  If 
anything, my tuning has resulted in more power than the cam swap.  I plan 
to go back to my original 3.2L cams when the 3.3L and blower go in.

Adam


----- Original Message ----- 
From: "Jason Hartberger" <at3hartberger@mail.com>
To: "Ian Fisher" <dataflash@yahoo.com>
Cc: "Zach Leahy" <leahyz@gmail.com>; <shotimes@autox.team.net>
Sent: Friday, February 18, 2005 2:44 PM
Subject: Re: [Shotimes] how to change cams?


> I was under the impression that swapping out MTX cams for the ATX cams 
> (intake) would yield better power? The MTX cams give greater lift... so 
> how would this not be a good upgrade? I'm genuinely curious... I mean, I 
> didn't spend a whole lot on these cams so I'm not *too* worried, but I 
> need to do a 60K anyway, I figured this would be a good excuse to get a 
> *little* more power out of it... and don't worry, I won't be getting new 
> tensioners.
>
> Jason
>
>
>
> Ian Fisher wrote:
>> I would also buy new timing chains...but I really
>> don't know if any of this is worth it for an
>> automatic.
>>
>> Don't buy new tensioners because you'll be depleting
>> obsolete stockpiles and I want to get mine first. :)
>>
>> Ian
>>
>>
>> --- Zach Leahy <leahyz@gmail.com> wrote:
>>
>>
>>>Jason,
>>>
>>>I have been in many a SHO motor, so let me say that
>>>this is a
>>>reasonably large amount of work.  If you are pretty
>>>comfortable with
>>>tools, go for it.
>>>
>>>First, look at a 60k maintnance, and that will get
>>>you most of the way
>>>there.  Yes you do have to take the timing belt off
>>>as it is attached
>>>to 2 of the cams.  basically once you are stripped
>>>down for a 60k
>>>(don't need to remove the water pump though) you
>>>will take the cam
>>>gears off (3 10mm bolts each) and the rear timing
>>>belt cover off which
>>>is a whole pile of 10mm bolts.  Then take all the
>>>camshaft bearing
>>>caps off and also the 4 on the briver's end that
>>>hold in the
>>>tensioner.  from there you can pick up the cams as a
>>>unit.
>>>
>>>Depending on what you get with your cams, you will
>>>probably have to
>>>swap the chain pullies onto them, unless your new
>>>set still has them
>>>on.  There is an alignment link on the chain to help
>>>line it all up
>>>when you put it back together.  It has been a little
>>>while, but iirc
>>>the alignment links line up with the dots on the
>>>cams, which will be
>>>the farthest passible apart.
>>>
>>>Put the cams and tensioners back it, I don;t know
>>>the torque spec off
>>>the top of my head, and torque it all.  This is also
>>>a great chance to
>>>change in new camshaft seals.  New valvecover seals
>>>are not a half bad
>>>idea either.  put the rear timing cover back on, and
>>>the cam belt
>>>gears (they are pin indexed) and continue the
>>>reassembly per the 60k
>>>installation.
>>>
>>>Perhaps it would be a good idea to find someone who
>>>has done it before
>>>to help you through it.  Where are you located?
>>>
>>>Z