Old Engine
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=2458
Printed Date: November-23-2024 at 3:41am
Topic: Old Engine
Posted By: brimeg
Subject: Old Engine
Date Posted: September-17-2005 at 12:04pm
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I just picked up a 67 Mustang rather cheap as the previous owner felt there was block damage. The boat has a 302 Interceptor in it that my guess went in around 77 or so.
After playing with the engine (new hoses, impellor, wiring, etc.) I was able to get it to start. Prior to starting I lubricated the cylinders with oil and turned the engine over by hand. Also put new engine and tranny fluid in. Very smooth. . . I then proceeded to start the engine on a small test tank and it started and idled great. Running it there is some nose under the valve covers but I would think just based on age this is normal. It appears evenly distributed amongst all of the valve cover. What should / could I do to this engine. Engine Flush Tranny Flush Rinse the Cooling System with Something Rebuild Something Else I have want I think is solid oil pressure just above 20 psi at idle which jumps to or above 40 at middle RPM's. Engine temp is a solid 140. Not that hours means anything but I have no clue in regards to the engine. Thanks for the help and insight. |
Replies:
Posted By: jameski
Date Posted: September-17-2005 at 12:58pm
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I wonder what made your P.O. thing it had block damage. If it doesn't smoke, doesn't knock, and has good oil pressure, run it. You chould also do a compression test, but if it's running smoothly, then the compression must not be too far off. The tapping under the valve covers is probably just stuck lifters. They might free up after running it a few hours... even if they are still tapping, it won't hurt anything to run it; it just sounds bad... you can put a pint of transmission fluid in your oil and it might help. If that doesn't work and you want it quiet, replace the lifters. Sounds like a good engine to me.
One time I bought a great lawn mower at a yard sale for $10. The P.O. said the engine was bad. Turned out, the blade bolt was loose. That was 5 years ago, and I'm still mowing once a week with it.  ------------- current boat http://www.correctcraftfan.com/diaries/details.asp?ID=1977 - 94 Sport Nautique previous boat http://www.correctcraftfan.com/diaries/details.asp?ID=601 - 78 Martinique |
Posted By: GottaSki
Date Posted: September-17-2005 at 1:10pm
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Exactly,
My 25 year old 351 has had noisey lifters since I bought it in '96, its very strong, responsive and still uhm, tickin. It'll get fixed in due time. ------------- "There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing." River Rat to Mole |
Posted By: jameski
Date Posted: September-17-2005 at 1:38pm
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Yea, mine had one bad lifter when I bought it... the P.O. said it had tapped for 4 or five years. I replaced all 16 and it has been VERY quiet for 3 seasons and about 250 hours now.
But it won't hurt anything, 'a loose valve is a happy valve'. ------------- current boat http://www.correctcraftfan.com/diaries/details.asp?ID=1977 - 94 Sport Nautique previous boat http://www.correctcraftfan.com/diaries/details.asp?ID=601 - 78 Martinique |
Posted By: tleed
Date Posted: September-17-2005 at 2:05pm
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Keep an eye on the oil pressure.
I had a 1968 car motor with low miles that went south when the valve seals started falling apart. I replaced the seals, but a month later the oil pickup blocked up, starved the motor, and spun a bearing. My brother had the car at the time. I just didn't get to the valve seals in time, and enough little pieces were already making their way down into the oil pan. Car was running great, and only smoked a little on startup and throttle lift-off. Wasn't burning through much oil. The oil pressure sending light was coming on, but would go back off. I replaced the sending unit, but apparently it was telling the truth. Take off the valve covers and have a peek. |
Posted By: Tim D
Date Posted: September-17-2005 at 3:12pm
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You might need to adjust the valves. If the cam is worn, that could cause some of the lifters to make a loud tapping sound. ------------- Tim D |
Posted By: GottaSki
Date Posted: September-18-2005 at 11:35am
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'cept I think 68 1/2 was the last year with adjustable rocker studs. ------------- "There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing." River Rat to Mole |
Posted By: Guests
Date Posted: September-18-2005 at 4:06pm
If it sounds like running solid cam/lifters, i would change the lifters (or adjust. rockerarms). A faulty lifter will flat-spot your cam, break a pushrod or rockerarm. A boat i running higher rpm (but less load) then a car, and it is therefore more critical that the top rotary is in good condition. |
brimeg wrote: