4g54 block

[Fingers]

Gday all,
I have a 4g54 question or two… I have searched the forum and I think I am more confused now than when I started.

I have acquired a GJ Scorpion that has thrown a con rod through the block.

As the car is an auto with power steering, it will be a narrow block, and have a different timing cover for the power steer pump to attach to (I think).

Being a GJ it should be an Astron I, yet it has the lump at the back of the rocker cover, does this mean it has an Astron II in it?

The main question I have is regarding a replacement. Will any narrow block Astron fit ?(or be made to fit) and which ones are the best/easiest, and which to avoid?

Thanks

[Scorpma82]

As far as I'm aware, all 4G54s run the same conrods
It is a common mod to put an Astron I head on an Aatron II block to up the CR.....you may have one of these engines

[Fingers]

I was wondering if it was the other way, someone had put a late head on an early bottom end.

[C_Fernance]

GJ Sigmas still ran an Astron I, but in the Scorps they started using the Astron II in 1980 with the release of the GJ Scorp.

[Fingers]

So it's probably factory.
Either way, the block, crank, and a couple of rods, are junk.
Can I just go and get a Magna engine from the wreckers/scrappies for a rebuild, and use the sump, timing cover, and manifolds from the Scorpion engine?

[Scorpma82]

Yeah pretty much.......they are fairly interchangeable

[Sigmaproject]

So it's probably factory.
Either way, the block, crank, and a couple of rods, are junk.
Can I just go and get a Magna engine from the wreckers/scrappies for a rebuild, and use the sump, timing cover, and manifolds from the Scorpion engine?

If you have a Japanese Astron I or II (eg Scorpion..Triton..Pajero) then the Magna Engine block is a totally different animal. The sump and timing cover will not fit.

[Fingers]

Ok, so what block etc do I need to find?

[Fingers]

Yeah pretty much.......they are fairly interchangeable

This sounds better.... lol

[Fingers]

See why I am confused

[Sigmaproject]

Ok, so what block etc do I need to find?

Any 4g54 block that has a REMOVABLE BALANCE SHAFT COVER under the inlet manifold. That's if you are after a sump and timing case cover as well as internals.
If you want to use the block itself then it also has to match your gearbox belhousing.

[Fingers]

All I need is a rebuildable block, with crank and rods. The rest will be either salvaged from the dead 2.6 or replaced with new parts.