aackshun

iTrader: (3)

What "Shims" do people use in their "double shimming" experiments on 3.5's???

VQ30 sure, I can double shim those buckets but...

VQ35DE? Rev-UP? HR? Da fuh you use to "double shim" those buckets?

Lets say I want HR Cams w/ HR springs, HR Retainers and HR Buckets in a 3.0 head what duh fuh do I double shim with?

MoncefA33

iTrader: (6)

You shouldn't need to double shim the buckets, that's only ever been done on 3.0 engines.

NmexMAX

iTrader: (22)

http://forums.maxima.org/all-motor/3...ec-charts.html
http://forums.maxima.org/all-motor/3...revup-etc.html
http://forums.maxima.org/all-motor/3...ta-2007-a.html


~140$ for 24 valve springs/48 shims from Courtesy.

aackshun

iTrader: (3)

What shims? Which has been my question.... 3.0 shims? b cause 3.5's do not use shims.....

[edit] The answer I've been looking for is here...

http://forums.maxima.org/1626393-post5.html

I've been going about this all wrong, the goal that you guys have been talking about was to increase pre-load on the spring, not shimming the buckets (which is what I thought was going on).

Back to work for me.

mightyMax95

iTrader: (5)

i'd like to point out
a) i'm the one that finally found the answer to that question

and

b) there's a missed opportunity to respond to nmexmax that "i searched and saw those, but they didn't have what i'm looking for..."

NmexMAX

iTrader: (22)

I bought my shims from DAVEB.

Chris Gregg

iTrader: (59)

Can someone educate me (Readers Digest version) on the shims. I've not done head work on the VQ30 or 35. But, I know on the VG that hydrolic lifters are used and fill the gap between the lifter itself and the rocker arm. I also know the rocker arms have little steel "caps" between where the aluminum rocker and the top of the lifter meet. Are these caps what everyone is referring to as a shim on the VQ's?

Just trying to understand a shim. In my mind the hydrolic lifter should be filling any gap once it pumps up. Though, it makes sense that by having a larger shim, it would in effect increase how far open the valves travel each time they move. I can see the benefit of doing that as opposed to modifying the actual cam.
Thanks!

NmexMAX

iTrader: (22)

http://forums.maxima.org/all-motor/3...revup-etc.html