jimhc

iTrader: (1)

i have a 2wd cosworth the piston slap has been there since i bought the car but went away when warm now after av changed the oil to 10/60 fully syn oil the noise seems to be stayin alot longer and slight noise even when warmed up. the oil a was using was 10/40 fully syn only reason a used it was a had it sitting for my old car a sold

botters

iTrader: (2)

my car used to have noisy tappets on 10/60 and stupidly high oil pressure as well lol
since i changed to 10/50 its a lot quieter

cossie4i+

iTrader: (15)

Always use 10/40 in mine.

Steve

jimhc

iTrader: (1)

pain in the arse think al change the oil again waste of good oil tho but worth it if the noise go,s

botters

iTrader: (2)

fully or semi mate?

jimhc

iTrader: (1)

its always ran fully

tabetha

I had piston slap even when warm, oil didn't help, yours may just be getting a bit long in the tooth, how many miles has the bottom end done ?, mine had 200K so was entitled to be noisy!!
tabetha

jimhc

iTrader: (1)

77000miles. rebuilt 15000m ago roughly. if a,d a done 200k ad be noisy

tabetha

15,000 rebuild should be dead quiet, you sure it's slap you can hear, and not a lazy tappet that quietens down as the oil heats up ?
tabetha

jimhc

iTrader: (1)

its a diff sound to a tappet a had them done on my old cossie

tabetha

Did you swap oil brands at the same time, some oils do seem to make the engine noisier than others ?
tabetha

jimhc

iTrader: (1)

yeh a did a had millers 10w60 sittn when a had ma evo n thot al use that tae use it up