sr20det SOLID LIFTER shimming problem - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

ilovmy13 · 03-24-2012, 01:06 AM

im having a problem. I have installed valve springs and tomei solid cams. I did the calculations with a feeler gauge, and the results ive gotten seem as if the valve are sitting to low. Most off the numbers i got are to high that tomei doesnt even make shims that large( above 3mm). I even put the stock shims (3mm) on top of the retainers and after installing the rocker and cam the rocker just can be moved around easily ( there is to much clearance between the cam and rocker). WHAT IS WRONG?!?!? is it the cams, the valves ?!?!?

ilovmy13 · 03-28-2012, 06:20 AM

anyone any input

jedi03 · 03-31-2012, 08:54 PM

u try calling tomei yet?

2_Liter_Turbo · 04-07-2012, 02:36 PM

I had a similar problem a couple years ago. What happened with me is that the machine shop ground the top of the valves too much (they used 91 SE-R Specs) so it caused too much of a gap. If that's the case, you'll need new valves.

UNITEDMASTER · 04-08-2012, 06:15 PM

^^^^ what he just said is spot on.

I just had a customer with a similar situation,except machine shop xyz,sunk the hell out of his valves(cut seat toooo much) so his head was too tight. So i had to take it all apart & grind the stem tips & hand fit each valve!!!!

jilo · 04-12-2012, 10:03 PM

i had this same problem and fixed it by cutting shims from feeler gauge and putting it under the sla in its bore. it just shims the sla up higher so you need a smaller shim. works fine for me, no problems at all.

03-24-2012, 01:06 AM	#1
ilovmy13 Leaky Injector Join Date: Jun 2011 Location: vegas Age: 35 Posts: 120 Trader Rating: (5) Feedback Score: 5 reviews	sr20det SOLID LIFTER shimming problem im having a problem. I have installed valve springs and tomei solid cams. I did the calculations with a feeler gauge, and the results ive gotten seem as if the valve are sitting to low. Most off the numbers i got are to high that tomei doesnt even make shims that large( above 3mm). I even put the stock shims (3mm) on top of the retainers and after installing the rocker and cam the rocker just can be moved around easily ( there is to much clearance between the cam and rocker). WHAT IS WRONG?!?!? is it the cams, the valves ?!?!?

04-07-2012, 02:36 PM	#4
2_Liter_Turbo Zilvia Addict Join Date: Mar 2005 Location: DFW, TX Age: 41 Posts: 803 Trader Rating: (28) Feedback Score: 28 reviews	I had a similar problem a couple years ago. What happened with me is that the machine shop ground the top of the valves too much (they used 91 SE-R Specs) so it caused too much of a gap. If that's the case, you'll need new valves. __________________ 96 S14: Grip Track Car 90 R32: Bucket List Car 92 S13: Just for Fun Car Instagram: @SS.Maxey

04-08-2012, 06:15 PM	#5
UNITEDMASTER Nissanaholic! Join Date: Apr 2006 Location: Anaheim Posts: 1,626 Trader Rating: (10) Feedback Score: 10 reviews	^^^^ what he just said is spot on. I just had a customer with a similar situation,except machine shop xyz,sunk the hell out of his valves(cut seat toooo much) so his head was too tight. So i had to take it all apart & grind the stem tips & hand fit each valve!!!! __________________ MR JACKSON.

04-12-2012, 10:03 PM	#6
jilo Zilvia Junkie Join Date: Jun 2006 Location: ct Posts: 312 Trader Rating: (2) Feedback Score: 2 reviews	i had this same problem and fixed it by cutting shims from feeler gauge and putting it under the sla in its bore. it just shims the sla up higher so you need a smaller shim. works fine for me, no problems at all. __________________ "just throw in like 8 packs of BBs and do a burnout. DIY shot peen, done and done."

03-28-2012, 06:20 AM	#2
ilovmy13 Leaky Injector Join Date: Jun 2011 Location: vegas Age: 35 Posts: 120 Trader Rating: (5) Feedback Score: 5 reviews	anyone any input

03-31-2012, 08:54 PM	#3
jedi03 Nissanaholic! Join Date: Jul 2008 Location: albuquerque Posts: 1,842 Trader Rating: (8) Feedback Score: 8 reviews	u try calling tomei yet?