The SK 396 LT1 inspection.

Scott Knight (SK) is one of the founding fathers of LT1 modifications.
 He sent his 395/396LT1 to me for a tear-down and inspect.

 

The motor as delivered in a clean dry box.  On the right is a photo of the Oliver billet main caps, Oliver billet rods and JE custom pistons.



I am very impressed with the block prep. SK smoothed the block inside and out and enlarged the oil drain back holes.


The motor has AFR heads, Jesel shaft rockers and coated JE custom pistons.


The Crower lifters and bushed lifter bore and lifter valley stands/vents.

Here I'm taking out all the rod/piston sets to measure rod bearing clearance.

All of the rod/piston pairs are out.

All rod bearing clearances were measured and most were .0025 to .0027" but a few were .0020" to .0023".  I'll work on that and adjust with different bearings.

The rear main bearing oil hole never fits well over the LT1 block oil hole.


After careful grinding with a Dremel tool there is a bit better fit.


Before taking off all the main caps I checked crank end play and it's at .006"
With the rear main bottom cap off it's .010" which is a sign that the thrust cap was not set and torqued so that the rear main bearing shells share the load evenly.

All main bearing clearances were checked and it's .0025, .0025, .0025, .0030, .0030 from #1 to #5 which is right at where Golen and the other shops I use shoot for.

Piston ring gap is .030" top and .030" 2nd ring.
Set crankshaft in place and torqued main caps.  Found that the crank did not spin freely.  It had a slight drag every 180deg.  Humm.   Well the block and crankshaft went to Brinkley Auto Machine and he found that the align hone was off and also the crank was tweaked about .0015".  Scott and I think that was from the Cryo treatment.  As of 6-27-08 crank is in the block and it spins freely.  Final assembly soon.

Measuring main bearing clearance again.  This time using uncoated Clevite H-series, Standard and .001 under.

Mains #1, 2, 3 get standard size on top and .001" on bottom.
#4 and #5 get standard/standard.  (#1,2,3,4=.0030" and #5=.0035")

GM extreme timing set.

BRE cam.

Working with dip stick and windage tray.

This Moroso tray might fit with some tin-snip action.

Lokar dipstick and Moroso windage tray trimmed to fit.

This set up will require very careful reading and interpretation of oil on stick.

Messaged the corners of the tray.

Billet Fabrication oil pan.

Heads on and torqued.

Jesel rockers all on with Crower lifter pre-load set at 1/2 turn.

The BF pan fit quite nicely but it is 8.5" deep and my Titan oil pumps are 8.0".

So I talked SK into a brand new (custom made to fit around a Titan gerotor oil pump) Stef's oil pan.

Remember, if you order one of these pans from Stef's it will not fit over a Titan oil pump unless you specify that it be made to the Ellwein Engines design.  Stan at Stef's can make one for you.

These pans are not easy to fit even with all the custom design features.  I still need to clearance some areas inside the pan and then I make sure to use Permatex "Right Stuff" RTV.  The pan is bolted down without RTV here check for interference with the rotating assembly.  This is a non-stroker notch pan by the way and it fits on this 396LT1 stroker pretty well.


www.Karl-Ellwein.org 2008, Ellwein Engines 2008, , email Karl Ellwein