SuddenlyIts1960!
Member
Is it normal for there to always be a little "blow by" fumes coming from the vented oil cap on these cars? Every one I've seen has done it.
Engine question
- Thread starter SuddenlyIts1960!
- Start date
commando1
Old Man with a Hat
Let's put it this way, 50 years ago they didnt have any blowby.
Fifty years ago. Five-oh.
Fifty years ago. Five-oh.
There shouldn't be any. The PCV will create enough of a vacuum in the crankcase that the blow by shouldn't come up through the cap.
Two things could be wrong.. Simplest cause is a bad PCV. The FSM shows a good method for checking using just a parts tag. The other cause is blow by and that could mean bad rings or some other problem. I once blew a hole in the top of a piston in my SFGT. It still ran OK, but there was an oil mist that puffed through the cap like a steam train.
Two things could be wrong.. Simplest cause is a bad PCV. The FSM shows a good method for checking using just a parts tag. The other cause is blow by and that could mean bad rings or some other problem. I once blew a hole in the top of a piston in my SFGT. It still ran OK, but there was an oil mist that puffed through the cap like a steam train.
Of course I just happened to think... We are talking Forward Look cars. I don't know what year they went to a PCV and eliminated the road tube.
The road tube dropped down into the air stream under the car and created a vacuum. Not near as good for everything (environment and oil contamination) as a PCV and the reason why I converted my 53 Windsor to a PCV system.
The road tube dropped down into the air stream under the car and created a vacuum. Not near as good for everything (environment and oil contamination) as a PCV and the reason why I converted my 53 Windsor to a PCV system.
sb61fury
Well-Known Member
My '61 has 1 of those . I have not seen smoke coming from the bottom . When I fuel I use a fuel with additives . I learned when you use fuel with no additives you are decreasing the life of your engine. I plan to use shell but I will add lucas ethanol treatment in my tank before the fill ups.
An older motor will have blow-by, it's almost a given.
SuddenlyIts1960!
Member
I just wondered because every forward look ive seen seems to have a little vapor coming from the oil breather.
My '62 New Yorker did, and it had the PCV too.
twostick
Senior Member
Yeah tired engines will do that...
Kevin
Kevin
PCV systems were first required by California on all 1961 and later automobiles sold new in the state. New York followed in 1962, and then most cars had it by 1964 across the nation. My 1957 Chrysler 300C with a rebuilt 392 hemi engine with about 4K miles on it doesn't show any visible blowby nor does my original 29K miles 300F show any blowby yet either. My 1958 Dodge Custom Royal Lancer with the 361 cu. in. engine doesn't show anything either with the original 43K miles on the clock. If the engine is in good shape, it shouldn't really show much of anything out the road draft tube. Much less likely to show anything significant with PCV equipped engines until high mileage and significant wear.
If that were asked of me, no, not in '62. As was said above, all cars in California had PCV in '61. My New Yorker was from Texas, but it had a PCV.
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