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!
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
have the same problem?
Wednesday, July 8th, 2009 AT 6:46 AM