I have this 20XE that I bought (not seen running)but assured its good. The head had been repaired some 10k ago. I wanted to just strip off the ancilleries and clean it up, paint the block, get rid if the oil leaks and put it in the Astra.
I have the inlet manifold off and notice that the small beather pipe from the cam cover is blocked as it enters the banjo on the inlet manifold. There is also a water connection here from one side of the manifold, through the banjo and out to I think the header/expansion tank (didnt see it in the car so cant be 100% sure)
Right, IF I do the breather mod which I think was to vent the rocker cover to a catch tank and atmosphere via the big cam cover hose, do I also block the small hose at both ends. Logic says I must or unmetered air will loop through to the inlet.
OK, if I am doing the mod above, what point is there to the water hose connection at the banjo bolt? surely that was only to stop oil vapour from solidifying as it entered the manifold and so blocking the recirculation of crankcase fumes?
I would just go straight to the header tank bypassing the banjo.
The crankcase breather pipe by the dipstick to cam cover is well smothered in old oil and the sump gasket has been leaking some, I guess that this is due to increased crankcase pressure as the small pipe into the manifold was blocked and the only venting then is either to push out the dipstick or get past gaskets.
Another Q, I am right in saying that I can get a static leakage test done on the bore/piston ring wear using a leakage tester with hand cranking the engine.