Blow-By check details please.

[78240D]

Short and sweet. Does the engine have to be up to operating temp. to do the 'oil cap dance' check?

Thanks.

Oh, '78 240D 4Spd. 128,000MI

[Knightrider966]

Originally Posted by 78240D

Short and sweet. Does the engine have to be up to operating temp. to do the 'oil cap dance' check?

Thanks.

Oh, '78 240D 4Spd. 128,000MI

No, it doesn't have to be, but your more likely to get a more accurate and complete reading, even by this crude method if you wait untill the engine is warmed up! 128,000 is not a lot of miles to put on one of these!