Any of you fellas ever been in this situation? I was drilling the head off a stripped screw and I ended up drilling straight thru the screw and stripping the bottom center screw hole on the oil pump & oil pump cover. My plan is to clean out the hole, fill it with JB Weld, redrill it, put the cover back on, then apply a bead of FIPG to the seam all the way around on the oil pump & oil pump cover, then call it good. Unless you guys have a better Macgyver trick up your sleeve.
Oil pump screw hole stripped.
- Thread starter jbyrd78
- Start date
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It would appear you need one of these.
And a pair of these:
I think @Pin_Head has the best suggestion, just replace the cover for the reason cited.
How does replacing the cover solve the problem? Isn't the problem that the threads holding the cover on are drilled out?And a pair of these:
View attachment 2291507
I think @Pin_Head has the best suggestion, just replace the cover for the reason cited.
I think the Heli-Coil solution makes the most sense, though centering it might be tough as the hole now looks off center.
Are you suggesting the entire oil pump housing or just the front cover? Because he jacked the THREADS in the HOUSING, not just the hole in the cover.
I'm thinking pick up a new cover (or used one) and JB Weld / Epoxy fill the hole, drill and do helicoil (or equivalent. Do not slobber caulk on the sealing area unless you gouge it for some reason. The rubber seal of the cover seals against that surface, it doesn't use sealant like FIPG.
My concern is the messed up screw hole on the block. Yeah the cover is easy, get a new one, the block is the kicker.
having not been that deep yet, is the thread in the block or in the timing chain cover?
The offset holes are a real mother. Is that hole in a flange or in a solid portion? From the dirt showing in the hole it appears to be a flange.
The offset holes are a real mother. Is that hole in a flange or in a solid portion? From the dirt showing in the hole it appears to be a flange.
Yes. The whole enchilada. It is not that expensive and they are made by Aisin.
Whole new can of worms......
OP has two issues. Cover (because of what looks to be excessive wear in the thrust area) and partially drilled out threads. Replacing the cover solves the first issue. If it were me, to address the threads, I'd run a tap down the remaining/original threads insert the mounting screw with release agent on it, fill the void with JB Weld (or epoxy made for this) and then reassemble using minimal torque.
Can you pull the timing chain cover without pulling the head and oil pans?
But, it's best if you pull the head and upper oil pan to replace it, right? Can be done otherwise with a bit of difficulty......
It depends on the though of what it's worth.
Also, if it' truly a flange, can you place a screw in it, then nut it from the BACK side?
You could try to helicoil it in place. The trick to drilling the hole straight is to drill a pilot hole in a piece of half inch steel plate using a drill press and then use that over the pump surface to guide the drill. Fuggedabout JB weld. It just won’t do.
davidp14
SILVER Star
If it were mine, this is what I would be doing. Maybe try helicoil as a temporary fix, but I'd want a new cover asap.
Of course knowing me, I'd find a way to put a new short block behind the new timing cover.
Fill the hole on the old cover with liquid steel. Let cure, then drill from the backside as you can see the outline of original hole. Bolt that to the timing cover, use good quality drill bit to open up timing cover hole to accept insert. Install new cover.
Or fill timing cover threads like Flintnapper says. Its only one of the threads buggered, the screws should be put in with locktite anyways.
Or fill timing cover threads like Flintnapper says. Its only one of the threads buggered, the screws should be put in with locktite anyways.
Dirty Koala
SILVER Star
Evaluate how much time and effort it will be to have to pull it all apart again if/when a patch up job fails. If it were me I would be replacing the timing cover and oil pump cover with new.
