Im with Pete..got a set of shims and injector orings waiting. When i find my sack in wifes purse, ill go for it. I rented them just to do gp's. But, will presdurize cups and replace ONLY whats broke. So far, nuth'n in bottle, thank god!..290k n 170k

 

I need to vote 12 more times.......

I voted in the "no" 251+ area but need to put "no" for 100K, 150+k, and another 251+k. On the personal side.

A few 150+k "no" answers and a whole lot more 251+k ones for work.

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I don't know of a way to let you vote 12 more times, but it would be great if we could add that granularity of detail from your experience.

Where is Stuart when we need him?

 

As above; fix it when it breaks. If nothing breaks, preserve the factory goodness. Just do maintenance and drive it like you paid for it.

Said the guy with bald tires and a hood not opened in 6 months. Thought about it after reading this thread, but today it was 57* and sprinkling, like hell if I'm going out in that weather.

These engines are well travelled paths of engineering, millions of iterations, assembled by folks who could probably do it in their sleep. Yes there will be the random omission of sealant or mis-torque that somehow slipped past QC, but they are manifestly rare. The track record speaks for itself, and I trust American and Mexican labor backed by ISO certification. Except for the unlucky sod who inherits cavitation from the PO it's almost always a problem with something bolted on.

When I find DB Cooper's lost bag of cash and I get 160/80s I'll inspect the degas bottle closely. But without other symptoms I doubt I'll spend the time to pressurize the system. I don't think I can seal the cups better than IH did.

 

If you look at them and they're not cracked or leaking, I wouldn't touch them. I had three cracked and leaking. Coolant in the fuel filter and oil in the coolant was the problem I found when my truck started running like crap. I replaced the cups twice, each time having trouble getting them to seal. Then I removed and re-installed two cups again before I finally got them to seat properly and quit leaking. I had all the special tools for the procedure, and thought I had it right each time, but they are a PITA to do. The worst part of it is you can't tell if they are right without putting it all back together and starting the engine. The secret to success is absolutely clean and dry parts before trying to seat the cups and don't buy cheap cups. Ford says you have to pull the heads to do it, but that's not true if you have the special tools. I would do it again if I had to, especially before I paid someone else to do it, but I wouldn't like it.

 

Good info and quality thread btw.

 

As of today (01/21/2018):

NEVER Changed = 86% of responses, per the survey chart.

HOWEVER, if you count the extra "never changed" values from cleatus, the value increases up to 89%

For those who HAVE changed at least one cup, that occurred at >250K miles @ 50% of the responses.

 

Watch.....

Tomorrow morning I'll have one sitting outside of the big door with fuel in the coolant.

 

Trying to catch up with Chris..... but at 480,000.... never had a cup problem

 

I'm jealous.... severely....only at 283k....45k miles on my clutch job from two summers ago though.

 

Should be easy now. Son in law doesn't drive that much, and my current truck is about 395k behind you.