Cracked Block SP6?
Discussion
The abridged version.
White smoke in breather, slight milkyness at TOP of stick, but not in oil at bottom.
Drained oil (50 miles old) has no milkyness and no signs of water, perfectly reusable.
Only steamy when hot, car starts runs drives PERFECTLY. Headgasket test shows nothing.
No Oil in water, just water in oil.
THE FULL VERSION:
Speed 6, Original problem, water in oil. Smokey from exhaust, white.
Strip down, remove blah blah. Had an obviusly cracked head, AFAIK in at least 2 places between valve seats and in a port, maybe more, but didnt look too hard after I found those.
Great! Problem identified. had a good check of the block and liners several times to check for any impending doom, none found. Bores worn a little on thrust side, nothing too major. In all honestly could do with some liners, at the very least a hone. Not for now.
Put back together. Renew water pump seals. Torque head to 20lbs, then to 80 lbs, set timing check rotation, great.
Put back in car, reasemble and put everything together.
Fill with water and oil, prime fuel.
Turns over once and fires (not primed oil or anything at this point, this is the first time its been spun over by motor since removal). Oil pressure 60 PSI within a few seconds.
Great stuff, balance throttle bodies. Didn't notice a spring hand fallen out between the bodies, made balancing interesting for 15 minutes..... Eventually got there! At this point, car is up to temp, 90 ish deg water and about 75+ oil. Idling healthily at 900 rpm and a steady 18psi oil.
Great stuff, except, there is a reasonable amount of white smoke from breather.
Residual water from "water-in-oil" from previous problem I think, probably just go away.
Box back up, omitting bonnet for ease of access, take car for test drive. Performance is perfect, starts idles and works exactly as they all do, if anything else better! Return to garage, only to find the smoke remains....
Pull the dipstick theres definatly water vapor. Top of the dipstick has droplets on it, but the oil itself is perfectly clear and shows no signs of milkyness.
Walk away and come back next day, start car, perfectly. Idles perfectly, no smoke from breather. As car warms up, smoke starts again, do head gasket test. Clear.
Pull apart oil cooler, reseal and reasemble, no difference.
So I pull apart the fron chain case in situ, suspecting a doddgy water pump seal install.
Drained oil (50 miles old) has no milkyness and no signs of water, perfectly reusable.
Put pressure test on coolant system, pressure holds no problem (cold at this point), no signs of any leak around water pump @ 40 psi, no sign of water ingress in cylinders etc etc.
Reasemble, same problem remains, as in slightly milky stick and steam when hot.
hair pulling out commenced.
Your thoughts guys?
White smoke in breather, slight milkyness at TOP of stick, but not in oil at bottom.
Drained oil (50 miles old) has no milkyness and no signs of water, perfectly reusable.
Only steamy when hot, car starts runs drives PERFECTLY. Headgasket test shows nothing.
No Oil in water, just water in oil.
THE FULL VERSION:
Speed 6, Original problem, water in oil. Smokey from exhaust, white.
Strip down, remove blah blah. Had an obviusly cracked head, AFAIK in at least 2 places between valve seats and in a port, maybe more, but didnt look too hard after I found those.
Great! Problem identified. had a good check of the block and liners several times to check for any impending doom, none found. Bores worn a little on thrust side, nothing too major. In all honestly could do with some liners, at the very least a hone. Not for now.
Put back together. Renew water pump seals. Torque head to 20lbs, then to 80 lbs, set timing check rotation, great.
Put back in car, reasemble and put everything together.
Fill with water and oil, prime fuel.
Turns over once and fires (not primed oil or anything at this point, this is the first time its been spun over by motor since removal). Oil pressure 60 PSI within a few seconds.
Great stuff, balance throttle bodies. Didn't notice a spring hand fallen out between the bodies, made balancing interesting for 15 minutes..... Eventually got there! At this point, car is up to temp, 90 ish deg water and about 75+ oil. Idling healthily at 900 rpm and a steady 18psi oil.
Great stuff, except, there is a reasonable amount of white smoke from breather.
Residual water from "water-in-oil" from previous problem I think, probably just go away.
Box back up, omitting bonnet for ease of access, take car for test drive. Performance is perfect, starts idles and works exactly as they all do, if anything else better! Return to garage, only to find the smoke remains....
Pull the dipstick theres definatly water vapor. Top of the dipstick has droplets on it, but the oil itself is perfectly clear and shows no signs of milkyness.
Walk away and come back next day, start car, perfectly. Idles perfectly, no smoke from breather. As car warms up, smoke starts again, do head gasket test. Clear.
Pull apart oil cooler, reseal and reasemble, no difference.
So I pull apart the fron chain case in situ, suspecting a doddgy water pump seal install.
Drained oil (50 miles old) has no milkyness and no signs of water, perfectly reusable.
Put pressure test on coolant system, pressure holds no problem (cold at this point), no signs of any leak around water pump @ 40 psi, no sign of water ingress in cylinders etc etc.
Reasemble, same problem remains, as in slightly milky stick and steam when hot.
hair pulling out commenced.
Your thoughts guys?
Edited by cerdad on Monday 20th March 22:41
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