lito
Senior Member
This is what was used for the gasket maker:
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Oh no, that engine is doomed now! lol.
Looks like loctite 518.
This is what was used for the gasket maker:
![]()
Oh no, that engine is doomed now! lol.
Looks like loctite 518.
Use a NPT tap?
Yes sir! After looking at the picture it does look weird, but it's 1/8 NPT. will be plugged until time for turbo.

After sitting at work and having nothing else to do but think about what weight oil I should use for break in, it leads me to this.
The motor was assembled within factory specs, mains/rods: .0015", PTB: .002", Rod Clearance was: .011-.014". I will still be using VCT and all that good mess, so should I stick with 5w-20 or switch to something else for break in?
It's always easy to give information to others, but then when it comes to your own stuff you start to second guess yourself.
I've always used conventional 5w-20 for break in. I got a little fancy with the current motor and added some jegs break in additive with the second oil fill. The whole reason I use stock clearances is so I don't have to reengineer things including fluids.
No matter what you go with I'd advise that the start up oil gets dumped rather quickly. Maybe 50 miles and a few light pulls at most. We don't have clean rooms to assemble our motors in and it shows in the amount of debris they collect just from sitting. I always bag the motors when not working on them but they still get lint all over the oiled surfaces so it must be inside too.
IMO it's very important that the oil be able to flow and form a wedge. We know without a doubt that 5w-20 does that with stock clearances. I'm sure you will get lots of opinions. I try to stick with what works.
If you want to go for some oil that is more dedicated for break in and not break the bank, the the mineral valvoline 10-30 VR-1 is quite good.
Only comes in 30 and 50
** Also can anyone tell me the part numbers or sizes of the freeze plugs for the heads? I removed them and kept them in a baggie and have no freaking idea where the bag is now.. and the heads are at the machine shop so I have no clue. Every head kit I find is just big brass plugs, but I usually stray away from brass plugs and aluminum heads/blocks.
I know small ones that go in near the exhaust ports and then the normal bigger sized ones on the ends of the heads. I do have the screw in plugs so I guess that's a plus.