21-04-2019, 09:40 AM
Significant leakage past rings is usually evident from crank handle resistance and the hissing noise at oil filler. Broken or stuck rings usual culprits.
Because a cracked block was suspected my car years ago was assembled with .010 bore taper, old type wide rings. Despite this fumes were not evident until a critical high speed over 50 mph when suddenly very evident. In the days when many cars were very worn, I have seen the same effect in other makes.
If the car is burning oil for any reason and exh fumes are being drawn into the car, a very distinctive fumey smell.
We were concerned about crankcase condensation and I ran the car with recon motor for a decade with pipe into the export air filter. Often wonder if it drew too much oil mist from valve chest.
Although performance was otherwise excellent and it used almost no oil my 1960s 1600cc car had excessive blow by for 30 years until recently. The external breather was extended to near road level which largely avoided fumes in the car.
Because a cracked block was suspected my car years ago was assembled with .010 bore taper, old type wide rings. Despite this fumes were not evident until a critical high speed over 50 mph when suddenly very evident. In the days when many cars were very worn, I have seen the same effect in other makes.
If the car is burning oil for any reason and exh fumes are being drawn into the car, a very distinctive fumey smell.
We were concerned about crankcase condensation and I ran the car with recon motor for a decade with pipe into the export air filter. Often wonder if it drew too much oil mist from valve chest.
Although performance was otherwise excellent and it used almost no oil my 1960s 1600cc car had excessive blow by for 30 years until recently. The external breather was extended to near road level which largely avoided fumes in the car.