Marty's Z22SE Rebuild

Marty64

Regular Member
Investigated on low oil pressure cause, i found another mistake :

In my oil pump, i saw that the spring is smaller compare to a Z22SE one.
What is the standard Z22se spring size ?
Does a smaller spring could have caused low oil pressure and damaged conrods bearings ?
P3040142.JPG


Mine (3.15"):
P3040146.JPG

The little spring was in my oil pump rebuilt engine and have part number 16804230 (not a gm)
I saw that on my VX220 engine the part number is GM 24450057

Also, can you give me the correct length that the oil filter housing spring must have ? Mine is 34.6mm (1.34 inchs)
P3040148.JPG
 
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the later oil pumps had a shorter spring to lower the oil pressure.

The vx220 oil filter spring looks fine.

I would say that your big end bearings failed due to the conrod caps being the wrong way around.
 

Marty64

Regular Member
Some news about my project:

I drive my Harrop SC VX220 with stock engine with 5400rpm rev limiter since 2 years.
I decided that was time to continue my rebuilt project.
Before that, a dyno test was done :

 

Marty64

Regular Member
Starting the third rebuild !!!


I found a good German offer of a redone engine block painted in black.
86.5mm rebored and balancing shafts removed.
The crankshaft was controlled and polishing the crank pins.
With the advice of Gil-lig I measuring clearance gap between the crankshaft and the bearings of rods:



Gap is within the constructor tolerances so I can continue.
I think, on previous build I had reversed the direction of connecting rods and also dispatch them not in order with their conrods.
As Vocky said to me : surely the main cause of my blocked engines.
 

Marty64

Regular Member
Pistons into new block :

I get my old chain sprockets of balance chain with a home-made tool (inspired from masses of inertia of coachbuilders) because they are inserted in brute force:

 

Marty64

Regular Member
Now time to remove my N/A standard engine from vx:


Doing this, i saw that the slave clutch cylinder is a little seek:

So, i decided to put a new LUK one:

Also fitting a lightweight flywheel:
 

Marty64

Regular Member
Fit the new forged engine into VX:

Without rocker cover to see if oil lubricate timing chain.

In same time, put on the board oil temp, pressure temp and boost gauges to see if all values are fine:
 

Marty64

Regular Member
After that, i tried a start of the engine without fire it to see if oil pressure is growing.
Hummm, few seconds at 0.2 bar and after 0 bar.
Pffff i though another problem camed.
Control all pipes and wire connexions : all good.
Loking under car : oh noooooooooo : 3 liters of oil are on floor. WTF ?
After inspecting, oil flow by gearbox housing.
Only 2 possibilities : a crank seal failure or a leaking oil gallery.
 

Marty64

Regular Member
Once again, i remove the engine from the car to analyse situation.
Found this:

Find the mistake !!!
Really disapointed that the old owner addn't remove black tape who's hiding oil gallery hole .
Angry to see this........
 
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