Naprec Valve Guide - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Kaisen · 11-02-2017, 02:52 AM

Any guys here using Naprec valve guides? I installed a set on my SR20VE head and it seems that the outer diameter of the valve guide is smaller than the stock ones at where the valve seals should sit, meaning the valve seals would not form a tight seal. What should I do? Measure the outer diameter and find a suitable valve seal?

kyral · 11-02-2017, 11:29 AM

how did you install them if they are a smaller diameter? these are interference fit parts I thought? id toss them and get a new set of steal or brass ones. valve guides are less than a dollar a piece usually (brass are about 4-5 ea)

11-02-2017, 02:52 AM	#1
Kaisen Leaky Injector Join Date: Feb 2015 Location: Singapore Age: 34 Posts: 67 Trader Rating: (0) Feedback Score: 0 reviews	Naprec Valve Guide Any guys here using Naprec valve guides? I installed a set on my SR20VE head and it seems that the outer diameter of the valve guide is smaller than the stock ones at where the valve seals should sit, meaning the valve seals would not form a tight seal. What should I do? Measure the outer diameter and find a suitable valve seal?

11-02-2017, 11:29 AM	#2
kyral Zilvia Junkie Join Date: Nov 2012 Location: wisconsin Age: 31 Posts: 448 Trader Rating: (7) Rides Gallery: kyral Feedback Score: 7 reviews	how did you install them if they are a smaller diameter? these are interference fit parts I thought? id toss them and get a new set of steal or brass ones. valve guides are less than a dollar a piece usually (brass are about 4-5 ea) __________________ The Game you lose haha