DI pump. Does it need a gasket?

[HKusp]

I am assembling my built engine and looking at the DI pump which has an o-ring where it engages with the head, but there is a recession in the surface of the pump that looks like it might need a gasket. The surface of the head where the two meet is machined smooth so I am trying to figure out if there is anything else needed to seal these two together.

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[ice445]

Did one come off with the original engine? I do know you're supposed to replace the bolts though

 

[Jaymar]

Not speaking from direct experience, but the way that o-ring seals you should not need anything additional on that surface. The o-ring will take care of it all. Also, I doubt you need to replace the studs. There would be no reason that they would be torque to yield.

 

[ice445]

Not speaking from direct experience, but the way that o-ring seals you should not need anything additional on that surface. The o-ring will take care of it all. Also, I doubt you need to replace the studs. There would be no reason that they would be torque to yield.

Sorry, I was misremembering. It's the bracket bolt that's one time use for some reason. I agree though, since it's only sealing oil that oring should be sufficient.

 

[StangTime]

That O ring will seal the hole just fine. The bolt has red Loctite on it and it's a bit of a bitch to take off. Ford's standard shop procedure is to throw away ANY bolt that comes with Loctite pre-applied. I re-used my bolt. There was enough remaining Loctite on it as it was. No issues doing doing so.

 

[Jaymar]

Yes, Ford says to throw away bolts that have thread locker installed but all you have to do is clean it up and reapply if you'd like.

 

[HKusp]

Thank you guys.

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