351w timing chain maintenance
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Freshman User
Joined: May 2020
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351w timing chain maintenance
Got a 94 f250 with the 351w. Got almost 200k miles but the thing runs like I bought it new. Is it necessary to replace the timing chain? I heard they are coated and the stuff can come off and contaminate your oil
Logistics Pro
Joined: Mar 2011
Posts: 4,197
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From: Central Wisconsin
I'm confused. You bought it new and it has 200k on the original timing chain? Or you bought it with 200k and it runs like new? Either way, timing chain is good for about 70-100k before it should be replaced. After that long there is quite a bit of slack in the chain and the stretched chain will lead to retarded valve train events causing a lack of power, and will eventually have enough slack to skip teeth on the gears.
Laughing Gas
Joined: Oct 2014
Posts: 946
Likes: 186
From: Carnation, Wah
My take, since it's not an interference engine:
replace it when you do the water pump, since you'll probably end up having
to fix bolts anyway when you go in.
At 140k, mine was at 'about the limit' for chain flop, so for $20- odd for a Cloyes set,
it was honestly the easiest thing about the entire job.
t
replace it when you do the water pump, since you'll probably end up having
to fix bolts anyway when you go in.
At 140k, mine was at 'about the limit' for chain flop, so for $20- odd for a Cloyes set,
it was honestly the easiest thing about the entire job.
t
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