94legturbo

iTrader: (6)

Hi all,

I have an early Legacy turbo which is renowned for suffering with noisy tappets.

Knowing the best way to combat this is to swap the heads for Impreza ones, I have aquired some early Classic heads, which I believe come with the hydraulic lifters.

So my question really is, are they just as likely to tap, or are Impreza heads not as prone to doing it for whatever reason as I dont really hear much about noisy Imprezas?

Or do I need v3/4+ to get the solid lifters and hopefully therefore no tapping?

Thanks in advance for any tips

joz8968

iTrader: (13)

My MY93 WRX is pretty quiet (hydraulic lifters) - v. quiet in the driver's seat (when it matters ). By comparison, my mate had a v.5 STI Type R (over bucket shims?) and his was a bit rattley by comparison. Of course, they may have been running too much of a gap and might have needed adjusting (if they can be?!), obviously.

You should be fine re. the noise if the Impreza heads are any good, etc...

dj219957

my 93 wrx has a lazy lifter when cold every now. its been fine now the warmer weather is here.

94legturbo

iTrader: (6)

thanks for the replies so far. It really bugs me in warm weather when i have the windows down and it sounds like a tank, winters great however, just up the stereo a bit and jobs a goodun. So these Impreza heads could be ok then

joz8968

iTrader: (13)

Before you shell out on getting different heads fitted, etc, have you thought about trial running a 15W-50 oil (as thick as you want to go for both cold and hot weights)...? Motul 300V Competition has this weight combo.

merlin24

iTrader: (1)

Why not just adjust the valve clearances on your Leggy heads - IIRC they are screw and locknut adjusters so a doddle to do.

Mick

joz8968

iTrader: (13)

...Get yourself a feeler gauge and you're sorted.

2_sxc_4_u

av got the same problem bt from a v4 sti loud tapet noise to start of in the morning,then qietens down just a little bit dho,all power and boost is still there

merlin24

iTrader: (1)

STI V3~4 have under bucket shims and are not normally noisy - it might be a slight exhaust gas leak from the up-pipe area which sounds like a noisy tappet when cold, and as the exhaust gets hot and expands its tends to get quieter - might be worth a look.


Mick

2_sxc_4_u

av just had my headers on last week and checked the up pipe,and its defo nt blowing,so i think it is the tapets dats makin the noise,is dat someting major
regards
uzy