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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

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Old 07-17-2012, 11:22 PM
husky390 husky390 is offline
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90 5.8l Making a knock or ticking noise when cold

Before I bought this truck I test drove it and did not hear any knocks or ticking noises. Now, when the engine's cold and I start it, I hear a knock or ticking noise coming from the top right hand side of the motor. Once the motor warms up, the noise goes away. Motor oil is fresh, of course and was told it's 10w30. Oil gauge is reading on the high end of "normal" and doesn't really drop that much.

One thought that I had is the top end may be sludged up and takes awhile for the oil to get up to the valve train. Any ideas?
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Old 07-20-2012, 12:45 AM
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Toplait Toplait is offline
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How many minutes till the knock goes away? Few seconds should be okay till the oil gets circulating but a few minutes.....eh

I have no idea other then your not getting enough oil circulation. Those oil pumps are pretty tough but sometimes the gears can wear out. I don't believe that is the issue though since the problem goes away.

The screen on the oil pump could be caked up also

I'd recommend trying to flush out the engine or taking off your valve covers and checking whats going on.

or, just change the oil. Try some slick 50 engine oil treatment. I usually put a bottle of that in my truck every 50k miles or so....almost 300k miles and going strong still. "Knocks on wood"

Clean that crap out!
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Old 07-20-2012, 09:05 AM
husky390 husky390 is offline
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Thanks. I'm going to run some seafoam through the brake booster line and dump the rest in the crankcase to flush it out. I definitely agree with you on synthetic. I plan to switch both my vehicles over to it. I almost bought a 96 F250 w/ a 460 that had 320,000 miles on the original engine. The guy ran mobil1 through it since he bought it with 60,000. I was impressed with that.
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Old 07-20-2012, 01:22 PM
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Roger T. Pipe Roger T. Pipe is offline
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How are the exhaust manifolds?
Roger
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Old 07-20-2012, 01:51 PM
husky390 husky390 is offline
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I haven't checked the bolts but it does not sound like an exhaust leak.
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Old 10-31-2012, 08:16 PM
wpiccian wpiccian is offline
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My 94 5.8 had a lifter that leaked off over night. Mine would tick a bit too when cold, but went away as it pumped up again. Not worth fixing.

I also put seafoam in the crankcase to try to fix the problem, but my #8 oil control ring broke and it smoked like a b!tch at idle and decel. Never again will I add seafoam to oil. Just my 2 cents.
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Old 10-31-2012, 10:35 PM
husky390 husky390 is offline
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I'll be replacing the valve cover and intake manifold gaskets on the 10th. Hopefully I can see what's happening as it has not gone away. I hear it every now and then when accelerating when the engine is warm. I'm guessing carbon is built up in the back of the head or the lifter is out of adjustment.
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Old 11-01-2012, 01:20 AM
OMT OMT is offline
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Mine does the same. Passenger side front of the valve train. On first start up it ticks for few seconds then goes away. Im figuring its an oil galley sludged. Cause it's esp loud if my truck gets a little low on oil. I have used Seafoam a couple times on the truck. It's got 224,xxx and counting. Drive it 70 miles almost everyday.
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Old 11-01-2012, 01:20 AM
 
 
 
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