Re: IML: 1961 oil preasure should I be concerned

[kevin Highstreet <rcjm60@xxxxxxxxx>]

Hi,

 

My 61 does the exact same thing.  The oil pressure reads pretty low and I get some smoke out of the breather cap until it warms up.  I only have 81K miles on mine and it runs great.

It may be normal for this engine with some miles on it.

Kevin

"Steve B." <Imperial59@xxxxxxxxxxxxxxx> wrote:

> > My 1961 oil preasure gage has always on the low end. It has never even 
> > read dead center. I have had the car for 15 years and rarely drive it , 
> > and it runs good. But now it needs to be my main and only car to get 
> > around. Im curiose if the preasure is low why then does oil blow out 
> > threw the breither cap . Wouldnt that appear to prove that there is 
> > plenty of preasure? What is the normal amount of preasure on the oil for 
> > this
>  413 wedge moter? Als the car does not ever over heat wouldnt low oil 
> > preasure tend to heat the moter up ?
>
> Oil pressure gauges are kind of like fishing buddies... You can trust them 
> to tell you the basics but when it gets down to the nitty gritty they might 
> not tell you the whole truth. The best way to know for sure what is 
> happening is to temporarily connect a mechanical calibrated gauge and see 
> what your pressure actually is. I consider 10psi per 1000rpm (hot)to be 
> safe. Anything below that I start to worry a bit.
>
> The oil blowing out the breather cap has nothing to do with oil pressure. 
> As an engine wears more and more of the combustion gas blows by the rings. 
> These gasses have to get out somehow and the breather is the easiest way 
> out. You have to have a pretty good bit blowing out to carry the oil with 
> it. I dont remember what year PCV came out, but if you have a PCV valve 
> make sure the valve is good and the
>  hose and passages aren't clogged.
>
> >From your description of the low oil pressure and excessive blowby it sounds 
> like you have an engine that is starting to get old and tired. A rebuild 
> would bring it back to good as new, but you likely have thousands of miles 
> of life left in it. Change the oil often and make sure you keep it full and 
> watch the oil pressure. I would expect it to slowly get worse and worse 
> until it reaches the point that it will be obvious to you that it is time 
> for a rebuild.
>
> Steve B. 
>
>
>
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