Mi16 Top End Noise

[matthewm 1]

Hi Gents, noticed a top end tapping on my MI16 during a recent event, can only be heard on tick-over, seems to disappear above 3k. Finished the event off and hasnt seemed to got any worse. 99% sure its from the top end (recently been drysumped so bloody hope its not the bottom!).

 

Have taken engine out and removed cams and lifters, all valve springs seem o.k. Going to strip and clean the hydraulic lifters, but debating taking the head off to get checked over - although with an event looming time is against my side. Any suggestions?

Thanks

[welshpug 1,657]

given it seems to go with revs, how long was it since an oil change and what oil were you using?

 

what oil pressures are you getting?

[matthewm 1]

10 litres of Comma Motorsport 5w50 put in when I fitted the dry sump at start of October, its done 2 road rally's since. Have used this oil for a few years so wouldn't of thought it'd be oil.

Out of interest, what would be the best oil to run in it?

[matthewm 1]

Sorry, pressure is around 50psi cold idle, 25psi warm. Think its around 40-50psi hot at 4k - have a mechanical gauge fitted.

[welshpug 1,657]

pressures seem rather low, given standard engine hits 6 bar at 4k!

[matthewm 1]

I'll whack that up abit then! Just looked at my gauge as my memory is on where the pin was rather than the numbers - usually 60psi at 4k hot, still bit low. On initial start up its around 85psi for first few mins, hot idle 25-30.