Engine Clatter on Startup
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New User
Joined: Oct 2001
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Engine Clatter on Startup
MY 1990 6 banger sometimes (not always) bangs like crazy for a few seconds on startup.
I does not always do it, but it is sure scary when it happens.
THe truck only has 78,000 miles and does not use oil or smoke.
Any Ideas?????
I does not always do it, but it is sure scary when it happens.
THe truck only has 78,000 miles and does not use oil or smoke.
Any Ideas?????
Senior User
Joined: Mar 2003
Posts: 378
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From: Corvallis oregon
Engine Clatter on Startup
Hate to say it, but it sounds like main bearings. Does it ever made noise under heavy load at low rpms?
If it does, (and it isn't pining) just use heavier oil untill you feel like rebuilding it.
If it does, (and it isn't pining) just use heavier oil untill you feel like rebuilding it.
Elder User
Joined: Dec 2002
Posts: 925
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From: Quaker Hill ,CT U.S.A.
Engine Clatter on Startup
Main bearings may not be the problem I think it is the rod bearings .
If you are not running a motorcraft oil filter the 300 will knock like crazy .
Get the Fl-a1 filter at a part store and your engine will not knock!
My 300 had 149000 miles on it when I bought the truck . It didn't have the motorcraft filter on it and it too knocked at start up . I switched it out and no more problems .
If you are not running a motorcraft oil filter the 300 will knock like crazy .
Get the Fl-a1 filter at a part store and your engine will not knock!
My 300 had 149000 miles on it when I bought the truck . It didn't have the motorcraft filter on it and it too knocked at start up . I switched it out and no more problems .
Posting Guru
Joined: Apr 2000
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Engine Clatter on Startup
I agree with the oil filter issue. Get one with a good anti drainback valve. (Wix, Motorcraft,) . Also watch for parking on excessive angles. My truck clatters more if I park on side slope of driveway !! Go figure.
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Engine Clatter on Startup
I am currently using a Ford Motorcraft FL1A filter...does not seem to make any difference.
I believe the bearings are fine, as the oil pressure is good, and I keep the oil clean. I am using 10w30 Valvoline and may switch to 10w40 next time, just to see if it makes any difference.
Also, I am going to try a WIX filter next time...this has been recommended before...thanks
I believe the bearings are fine, as the oil pressure is good, and I keep the oil clean. I am using 10w30 Valvoline and may switch to 10w40 next time, just to see if it makes any difference.
Also, I am going to try a WIX filter next time...this has been recommended before...thanks
New User
Joined: Dec 2002
Posts: 8
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From: Rome US
Engine Clatter on Startup
The filter is astart to the problem, The ford 300 does not have a check valve in the filter system to stop the oil from draining back into the base pan after the engine is shut off. The oil drains out of the filter and the clatter you hear is just verious engine parts such as valve train making the noise on startup. There is an adapter that that screws on before the oil filter, but I'm not sure where you might get it. It was intended for the 302 but does work on the 300.
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