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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

351W an interference engine?

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Old Dec 30, 2003 | 12:24 PM
  #1  
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351W an interference engine?

Sorry for the cross-post, but this is fairly urgent. Does anyone know if the 351w is an interference engine, or not?

THANKS!!!
 
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Old Jan 1, 2004 | 07:20 AM
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No, it is not!
 
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Old Jan 1, 2004 | 02:10 PM
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an interference engine

an interference engine ????


What is : an interference engine ??


Al
 
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Old Jan 1, 2004 | 05:15 PM
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An interference engine is one that is designed such that if the timing element (chain/belt, whatever) breaks or gets out of place, the pistons can impact the valves if they are down when the piston is on the upstroke - you end up with bent/broken valves, scored pistons, bent lifters, even potentially a broken/bent cam. It ain't pretty, when it goes bad.
 
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Old Jan 1, 2004 | 05:22 PM
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Originally posted by 8 Lugs
No, it is not!
Thanks, that's what I thought, but I wanted to make sure.
 
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Old Jan 2, 2004 | 10:55 AM
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What is : an interference engine ??

What is : an interference engine ??


Thanks for that info, Gavin

So! I guess it's a good thing, not to have an Interferance Engine.


By the way? I have a post thread "1986 f150 still bogging out"
maybe you can help me with my delemma?

Thanks: Al
 
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Old Jan 2, 2004 | 02:08 PM
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I have seen Windsors bend valves when the nylon top gear loses its teeth. Not always, but can happen.
Bob
 
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Old Jan 2, 2004 | 09:12 PM
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Is the 351HO an interference motor? If it is then that might explain why you've seen some that will bend valves and some that won't.

Justin
 
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