1985 Ford Mustang Oil Pressure is to high!

Tiny
JH_MASTERSON@ROADRUNNER.C
  • MEMBER
  • 1985 FORD MUSTANG
1985 Ford Mustang V8 Two Wheel Drive Manual NA miles

I have replaced the "1972" Ford 302 engine in a "1972" boat with Volvo sterndrive. The engine I replaced it with is a used "1980" to "1988" Ford 5.0 High Output engine out of a Mustang. I used the single breaker points Mallory distributor, Edelbrock intake manifold, water pump and starter from the original "1972" 302 engine.
Then I had the heads rebuilt. Put a brand new Holley 600 Four Barrel carb and new 140 amp marine alternator.
The old "1972" engine had a mechanical fuel pump that wouldn't work with the "1980's" engine because it had fuel injection so I put a universal electric fuel pump on.
Now after I got everything put together it was time to "TRY" to start it. Well at this time I was still using the original Holley 4 BBL carb from the "1972" engine that a friend rebuilt for me but I didn't know that, that carb was shot, the float ajustment screws and mixture screw didn't work. The amazing thing was it started but ran real rough so I shut it down and was taking care of some other minor lose end around the engine and left the key in the on position which means the electric fuel pump was still runing. By doing that I guess it did what I think is called Hydro-seized the engine. ( It filled up two cylinders with fuel. So I pulled the plugs and hand cranked the engine toeject the fuel from the cylinders and changed the oil and oil filter to get the fuel out of the lower end but not before I started again which was the wrong thing to do with fuel in the lower end because that seized the oil pump. Now I'm working in reverse.
Anyway I pulled the engine "AGAIN" and got a new high volume oil pump and put it in.
So after all that I thought my problems were over!
WRONG!
Took the boat out a couple of times not for to long and kept my foot out of it so the engine can get broken in.
THEN WENT OUT YESTERDAY WITH A FULL TANK AND DROVE ALL AROUND THE LAKE, STOPING AND FISHING A LITTLE AND KEPT MOVING AND TRYING NEW SPOTS MAINLY GIVING IT A GOOD WORKOUT THAT SEEMED TO BE GOING WELL TELL WE WERE ABOUT TO HEAD IN WHEN I HEARD A HISSING SOUND LIKE A AIR NOSSEL ON A COMPESSOR. SO I SHUT IT DOWN AND PULLED THE ENGINE COVER TO FIND THE NEW DIPSTICK I PUT IN HAD STOT OUT ABOUT 6 INCHES AND THE HISSING WAS COMING OUT OF THE DIPSTICK TUBE. I STILL HAD IT IDEALING AND THE OIL PRESSURE GAUGE WAS READING ALMOST 80 PSI. AND THE TEMP GAUGE WAS ONLY AT ABOUT 130 DIGRESS.
I've never come across this problem before so I'm not sure what's causing it.
I would very much appreceate some suggestions of things to check or try.
Thank You, Murphies Scapegoat
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Wednesday, July 8th, 2009 AT 6:46 AM

5 Replies

Tiny
RACEFAN966
  • EXPERT
I would pull all the plugs and check compression first. Let me know what you find.
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Wednesday, July 8th, 2009 AT 9:46 AM
Tiny
JH_MASTERSON@ROADRUNNER.C
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The plugs are in it and it seems to run fine - except the hissing sound and the dipstick being blown out 6in. With oil spraing out of the tube. It runs real strong!
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Wednesday, July 8th, 2009 AT 10:24 AM
Tiny
RACEFAN966
  • EXPERT
The dipstick will only blow out if there is enough blow by to push it out or there is no crankcase ventilation (PCV SYSTEM). You do have a pcv system on this right? If not because it is a car block you need to have one or it will do this too. Let know.
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Wednesday, July 8th, 2009 AT 8:21 PM
Tiny
JH_MASTERSON@ROADRUNNER.C
  • MEMBER
I don't have a PCV system on it.
One valuve cover has no ports at all on it and the other only has the oil fill spout that is a air tight screw cap. So I'll be putting a PCV system on it.
I got close to the same responce from my other resources earlier today.
Thank You Very Much! This is a good site and I'm glad I found it. I consider it money well spent and you'll be hearing from me again.
Till Then, Thanks, John Masterson
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Wednesday, July 8th, 2009 AT 8:41 PM
Tiny
RACEFAN966
  • EXPERT
Now what I would do if the valve cover allows is use the ford oil cap that has the hole in top with the rubber grommets that way you can put the pcv in that and then just find a way to put a breather in the other so you can hook a hose to the bottom or side of the air cleaner. The first pic is of the oil cap with hole that comes with groumet to put a pcv valve in and the second pic is of the breather with the tube so you can connect it to the air cleaner somewhere. Hope this helps. Thanks again.


http://www.2carpros.com/forum/automotive_pictures/249564_BTYzTgCGkKGrHgoHCQEkJwwr3WBKINFS5Ng_1_1.jpg




http://www.2carpros.com/forum/automotive_pictures/249564_images_2.jpg

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Wednesday, July 8th, 2009 AT 8:54 PM

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