jinata
40 nm does,nt sound very tight for head bolts, especially a big turbo diesel.
it sounds like the pistons are sucking coolant in through the new gasket and also pressurising the crankcase.
i would back off the head bolts a half turn, then pull them down a bit more than 40 nm and see if it improves it .
if it does you,ll know your on the right track !
