hallo cosworth owners
i could use your advise for a coupkle of issues i have with my 2wd cossy
well its been sitting for the last 3 months . now back on the road i heAR a lot of tapping even after agood run. and occasionaly smoke from the excaust. my oil prerssure is about 20 psi at idle and hot. could the lack of oil pres effect the hydraulic tappets ? i ll be measuring iol pres tomorow straight from the block is ther anything to look out for?

 

I'd be removing the rocker cover and sump and checking the oil strainer isn't blocked. IIRC my oil pressure sits around 40psi when warm.

 

i ll be changing the oil tomorow using an engine flush liquid for 10 15 minutes before drain just in case ther is sludge or oil deposites blocking if this dont help then its sump . my pressure is round 20 25 warm and rises with the revs

 

I would advise against using any engine flush. It can cause more harm than good.
Engine hot dump the oil and fit new filter and refill. 15/50 synthetic is best.
20 psi hot is a little low at idle needs to be around 28 to 30 psi.

 

the mistake i did 3-4 dayw ago was pooring in some additive for noisy valve lifters- tappets, which probably blocked somethintg thatw why i wanna use the flush to waterfy the oil the valve additive i poor in