I bought p/n MOR-25000 from summit to keep the valvetrain pieces seperate from the bottom end if it breaks.now, this kit has 2 basket shaped screen plugs which i assume go in the drain holes at the back of the motor, 2 flat screens which go in the timing cover drain holes?

but then it has 8 little plugs for each hole in front of the lifters, these arent screens, they are threaded plugs. Is there a reason for these, i was under the impression seeing the pic from summit that there were 8 little screens?

Any ideas on what i should or shouldn't do?

Thanks!

 

What myself and most people do is tap the 8 little holes and insert the plugs. They also make an oil ristrictor that lets air circulate but not oil. They also screw into the holes, but I don't think you can use the oil restrictor because of the lifter spider.

sw

 

the plugs are used to keep the oil flowing to the front and back of the valley where the screened returns can catch the foreign particles.

JB

 

so its not hurting anything by plugging those?

 

ttt, with normal engine wear, will these screens get blocked?

 

Mindgames on vaca so dont wait on him
I dont have experience with those parts so i dont have an answer for ya, but im curious too...

 

 

no, it's not hurting anything at all. plugging the holes just reduces windage on the crank. we've been doing the same on competition motors for years now.

thats just the "other" reason for plugging but in context to your original question, you want to control where the oil drains so you can catch little needle bearings and stuff that ends up in the oil when something breaks.

JB

 

so its not gonna plug up and trap all my oil in the top end, right?

EDIT: i guess i could always stick a magnet stick down to them once in awhile.

 

no.
a couple of things you can do to help oil drainback... smooth the cast surface in the lifter valley and paint it. of course you'll want to keep paint out of the lifter bores but this will help speed up the oil return. also, use a good standard volume oil pump. if using a mechanical roller, use restrictors.

JB

 

paint inside the lifter valley? wont it come off? what kind of paint do oyu recommend? and how do you recommend smoothing it?

 

Nope, the vacation has come to a momentary pause..... that is, until I get to Vegas Tuesday!

Jeff is right.
You need to do all this block prep stuff before any building starts though. Bare block.... no bearings, no nothing.

Use a cartridge roll on a rotary grinder to smooth out the casting flash. Clean everything really well so the paint adheres and use a paint specifically made for engines... Krylon, dupli-kolor, just as long as it's for high heat apps. Keep it out of the lifter bores (an old set of lifters comes in handy).

When you finish and the paint is dry, wash everything thoroughly with water and bit of detergent. The grit from the sanding will get into everything, so clean clean clean. Even if you don't do the "sanding", the paint helps speed the oil drain. That's a good thing.

-Mindgame

 

doh. ive already got the cam bearings and crank in. maybe ill just paint the lifter valley and not sand it.

what about the little plugs though

hmm what to do....

 

No machining unless you plan to take everything back apart. When you make any kind of cut on cast iron (tapping etc) you have metal fragments (duh) and possibly a bit of core sand. Bad stuff for a motor.

So, while the plugs are a nice thought, skip it and get on with other things.

-Mindgame

 

good idea, should i still paint the lifter valley or not? need to get this bitch running!!!