Simple things first...
Are the valve guide clearances correct?
What type valve seals were installed.?
We're seals placed on intake and exhaust guides.?
Is the valve lift within limits for the valve seals?
What kind of valve spring retainers were used?
We're O-ring valve seals used?

 

Yes, Clearance correct, valve lift also correct, is just a rebuild because i go from 4.560 bore to 4.600 bore, so i use the same things that works before rebuild.

valve stem seals are this ones: https://www.summitracing.com/dom/parts/cca-517-16

Compression test that side. If it's similar to the other three, then hopefully it's the intake gasket leaking oil from the bottom side or a rocker stud thread. Other than that - rings in upside down.

My best guesses - good luck.

I will compresion test it, also i will remove injector to see through injector hole if there's oil on intake.
I have never remove rocker stud, but i will check that also
I Have more valve stem seals, so i will change them also

Engine don't have more than one day rebuilded, i don't drive the jeep yet

THANKS

 

Compression test that side. If it's similar to the other three, then hopefully it's the intake gasket leaking oil from the bottom side or a rocker stud thread. Other than that - rings in upside down. Perhgaps broke a ring when installing, but that should show up on a compression check.

My best guesses - good luck.

 

Finally compression was between 185 and 195 on all cylinders, also change valve steam seals from cylindet 2, then i remove throttlebody and saw oil inside where intake joint with heads, but on cylinder 8 and 6.
Finally change all plugs and now the cylinder 8 is burning oil, so i think i have an intake gasket problem here

 

That's good news. Sounds like you have an alignment issue if it is leaking at more than one spot. How far was the block, heads, intake cut?

 

Block,head and intake was never cut, i buy this engine like this (555 edelbrock/pat musi 697hp), so maybe i install the intake bad.
Also i put some load to engine yesterday and it smokes like a train.
I will remove intake and install it with new gaskets.

Pd: the head and intake gaskets are the same model that comes with the engine

Regards

 

The 555 is a tall deck,,are you using a Mark IV or a Mark 5 intake,,

What heads Square port or Oval

 

Hi, my 555 is a small deck 9.8, it's 4.25 stroke and 4.560 bore, Dart big m block

Heads and intake are square port

 

I Found the problem, heads are cracked from upside to intake runner, i never touch this heads, so this is a problem that i have since the engine was new (it always smoke a little but now it's a lot), i think they ported it too much when they build it.

this is the engine, and heads are 51559 (discontinued btw) : Performance Crate Engines - Chevy - Big-Block - Edelbrock/Musi 555 RPM EFI 10.0:1 (697 HP & 643 TQ) - Edelbrock, LLC.

picture attatched, i remove intake with engine cold and clean the runners (some have a lot of oil), then remove valvecovers and drop oil to rocker and spring, and this is what happend in 4 runners.

So i dont know if i can fix them :/

Thanks for answers btw

 

A good welder can repair those.. Do most of the repair from the top side. Then blend in the port wall. Used to have similar problems on the old GM L-88 heads.:thumbup:

 

Dover heads in Chattanooga can make the repair almost invisible,,they repaired a set of Brodix for me,,yhat was overported by Big name machine shop,,but it can happen to anyone I guess,

 

Dover heads in Chattanooga can make the repair almost invisible,,they repaired a set of Brodix for me,,yhat was overported by Big name machine shop,,but it can happen to anyone I guess,

The problem is that i'm from Chile, South America, so send to repair to USA or buy a better set it almost the same cost

Regards

 

There must be someone near you that can fix that. That's a real nice looking port, but I don't think a blemish in the port is going to have much of an effect because of the boost.

 

This engine is N/A, my sbc is the turbo one :thumbup:

I Know this heads are not the best, and maybe i can gain some power with better ones??

i was looking for brodix and afr, but there is a lot of heads, i'm confused

 

Maybe i have to make a new post about this...

but engine specs are this ones

Dart Big M 9.8 deck
4.25 crank
4.600 pistons
10.2:1 CR
Dry Sump oil system
Victor jr 454 Intake
Holley dominator efi mpfi with DIS
camshaft: Intake / Exhaust
Solid Roller
Duration @.050” 254 262
Valve Lift – 1.7 Ratio .680 .646
Centerline 105 115
Lobe Separation: 110

Actual Heads edelbrock 51559

This head is 118cc combustion chamber,open chamber desing with 2.300/1.880 Valves 11/32", springs are matched to camshaft, scorpions rocker arms 1.7 Ratio, and 344/352 Intake Runner
Also exhaust ports are on stock location

There are head that will be a real upgrade to my combo?, now it's making 700+ hp to the crank