Tomei Powered VALVE SPRINGS - Manual (Page 8)

PRECAUTIONS
■ This is designed for competition use only and is to be installed by an experienced qualified professional.
■ Installation must be done with the correct tools and place to avoid any possible injuries.
■ Please refer to the official maintenance manual for detailed information with disassembling and
reassembling the valve train during the valve spring install.
■ Please select the correct valve springs to suit the camshafts profile that you will use.
■ All valve train components and the cylinder head must be clean and free from grime before reassembly.
■ Check the clearances of the camshaft cam lift to be sure that it suit the valve springs capabilities. If the cam
lobe is too high then it can catch the valve spring and cause terminal damage.
■ It is highly recommended to use the camshafts that Tomei recommends with the valve springs you have
chosen (or vice versa) as excessive stress can burden the valve springs when the wrongly selected
camshaft profile is chosen which will greatly shorten the valve springs life.
■ Take extra precautions when installing the valve springs to ensure no details are overlooked.
【Irregular Spring Pitch】
Install the valve springs with the tighter pitch down.
* The 4G63 has no paint colour indication so in this case you install with the tighter spring pitch end side down.
Equal Pitch (P1=P2) Unequal Pitch (P1＞P2)
【Double Spring Conditions】
Install the inner spring sheet before you install the stem seal.
【RB26DETT Type B/ Type C Conditions】
With the RB26 Type B and Type C packs they are to be used with the special retainers that are included
in the kit. Special Tomei valve lifters are required when using the TOMEI φ30mm core camshafts.
【SR20 Type B (Double Spring) Conditions】
Install the inner spring sheet before the stem seal.
The retainers that are to be used on the
Type B for SR20 can at times interfere
with the rocker arms so depending on the
application of the setup may require the
rocker arm tip to be shaved about 1mm
to allow appropriate clearance.
Look at the illustration to the left for
reference.
* Shave the rocker arms as shown to suit the application.
* Refer to the guide when shaving the shims surface.
8
P1
P2
P2
P1
TOP
BOTTOM
P
P
Large
0.5mm approx
2～3mm