Thread: Les Cooke Valve Retainers?
11-13-2009, 10:01 AM #1
Les Cooke Valve Retainers?
Been reading up on the retainers and shims and I have a few questions.
1. Can the shims be installed without removing the head?
2. Are the shims necessary with stock springs and 8600 RPMs?
11-13-2009, 10:05 AM #2
I have the Les Cooke retainers and we didnt have to install any shims..And Yes you can run his retainers up to 8600+ on stock springs..And No you do not have to remove the head..
11-13-2009, 10:07 AM #3
No need to remove the head if you have the riva install tool.
With Les's retainers you are good to 8600, although depending on hours you might look at replacing the stock springs for a new set. If this is the case I would prob just go with the Riva kit. Im going to do my valve train this winter, I have 117hours on my springs now and wouldnt trust them at higher RPM with just retainers so im going with the riva Kit and having my valves lightened.
1 thing to consider tho with the riva kit is that it can cost you a little power due to the springs being higher rated and being harder for the engine to compress. Real small details here tho. R88
11-13-2009, 10:22 AM #4
11-13-2009, 10:41 AM #5
11-13-2009, 10:48 AM #6
So you do not have to remove the seals to install the shims?? Should we install the shims then??
11-13-2009, 10:51 AM #7
11-13-2009, 10:53 AM #8
11-13-2009, 10:55 AM #9
Sno has you on the right track. Don't forget to hook up the air hose to each spark plug hole for the cylinder you are working on or the valves will drop. Using a small flat tip screw driver that has been magnetized will also help with those pesky half moon retainers.
My Riva valvetrain upgrade kit came with shims but we didnt use them.
11-13-2009, 11:08 AM #10
you dont need shims with the les retainers because his retainers are shaped differently than stock as to put more tention on the spring therefore no need for the shims. riva includes shims because there lightweight retainers are same shape as stock
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