2.6L Astron Engine Differences

[Sigmaproject]

Actually every time this is bought up it usually finishes in a shitfight

The trouble is so much stuff has been swapped between makes , models and transmission types over the years that you dont know what components might turn up in your Sigma or Scorpion.

Often someone will have a 2.6 Narrow block with a manual box behind it and declare that the 2.6 manual also came in a narrow block. Well this didnt happen from the factory. Someone has obviously stuck a 2 litre manual box behind a 2.6 auto block.

Peace brothers

[cheaterparts]

just to throw a cat among the pidgens

I have a astron 1 block in my sigma that has both narrow and wide patterns
and as far as I know its factory
all the side holes have counter bores for the hollow dowels

[Billsy]

just to throw a cat among the pidgens

I have a astron 1 block in my sigma that has both narrow and wide patterns
and as far as I know its factory
all the side holes have counter bores for the hollow dowels

ive seen this before aswell, i think it was a replacement engine under warranty, so they must have made them multi-fit to save on spares after they used up all the originals

[DragonCypher]

I've seen one of those multifits too, on a 2L

Also.. The replacement engine I'm putting in my car (old one is only engine mounts away from coming out.. pieces everywhere ).. its an astron 2, narrowblock REAR wheel drive with a jap 5spd

But its a different jap 5spd to the one I had behind my TN magna motor

And finally.... being astron 2, but not a magna its got adjustable tappets

Was told it came from a ute, presumably L200 considering its rwd. There's also some small strange differences like the fact the fuel pump comes out easy as piss in the magna motor with a little tilt, no way in hell i could get it out without removing bolts from beside the valve train that it was resting against, so I didn't bother.

[Astron Boy]

so that's what those extra holes on my 52 are!
Had no clue in heck why they were there.

[stealth]

i have also seen this
and figured was the gen 3
factory warrenty to suit both 1 and two available from mitsi factory to this day but thay want like $4000 for a bottom end
cheers stealth

[DragonCypher]

i have also seen this
and figured was the gen 3
factory warrenty to suit both 1 and two available from mitsi factory to this day but thay want like $4000 for a bottom end
cheers stealth

4 grand? jesus

Better off just doing a custom job cutting and rewelding a new pattern..

Or even better - use a gear box that fits

[cheaterparts]

Better off just doing a custom job cutting and rewelding a new pattern..

Or even better - use a gear box that fits

or maybe drill and tap a new pattern - I was going to make up a jig to drill wide pattern blocks to narrow . but I haven't run out af narrow blocks as yet

[C_Fernance]

I found another difference today. Rear main oil seal carriers.

Putting a new rear oil seal into a 2.0litre i have here i discovered that the threads that the sump bolts to were stripped. Grabbed a spare i had, put the seal in, and when i went to fit the original pressed metal bit it was too long.

The 2 carriers were a different thickness. They both use the same oil seal, same gasket, etc, but one was about 3mm thicker. Good to know that if your crank is worn causing the seal to leak you may be able to move the seal along the crank rather than having to do an expensive repair job.

[DragonCypher]

Well I've (finally) got the old engine out of the car.. only to find the input shaft location on the L200 jap 5spd is about 2 inches further to the front of the car than a TN magna jap 5spd (or whatever one was attached to my TN motor )

The box mount is wrong too, but thats fixable.. If the input is out, I can't fit it in can I?

In any of the top gears (1,3,5) the gearstick will probably smash right into the head unit or air con controls.. or at least get close. I did a quick measure and it'd probably still fit through the same hole in the floor but right at the front edge.

[cheaterparts]

Well I've (finally) got the old engine out of the car.. only to find the input shaft location on the L200 jap 5spd is about 2 inches further to the front of the car than a TN magna jap 5spd (or whatever one was attached to my TN motor )

The box mount is wrong too, but thats fixable.. If the input is out, I can't fit it in can I?

In any of the top gears (1,3,5) the gearstick will probably smash right into the head unit or air con controls.. or at least get close. I did a quick measure and it'd probably still fit through the same hole in the floor but right at the front edge.

the input shaft or the gear shift ?
the scorps / starion and late sigmas had an extention to the gear shift that moved the gear shift about 3" back

[amgis_obrut]

Anyone care to shed some light on the ASTRON 80

[81GL]

Anyone care to shed some light on the ASTRON 80

It's a 2lt and this thread says 2.6

[amgis_obrut]

Anyone care to shed some light on the ASTRON 80

It's a 2lt and this thread says 2.6

Theres a bit of 2.0l info in this thread as well, maybe it should be a thread on the entire ASTRON range including the 4g51!

[77GDWAGON]

The astron 80 is the 2.0 with balance shafts. They are found in late GTO and early scorps. They are no different than the sigma 2.0.

[DragonCypher]

the input shaft or the gear shift ?
the scorps / starion and late sigmas had an extention to the gear shift that moved the gear shift about 3" back

The part on the box where the gear lever goes into is 2-3" forward, so we're definitely thinking of the same thing..

But I cant just change that and swap it with the old box as only the mounting surface where the gear lever bolts onto is removable.
So am I going to have to now put the old box onto the new engine?

[cheaterparts]

the input shaft or the gear shift ?
the scorps / starion and late sigmas had an extention to the gear shift that moved the gear shift about 3" back

The part on the box where the gear lever goes into is 2-3" forward, so we're definitely thinking of the same thing..

But I cant just change that and swap it with the old box as only the mounting surface where the gear lever bolts onto is removable.
So am I going to have to now put the old box onto the new engine?

yes I changed my gear box the other way by removing the ext from my boxs and fitting the forward style shifter

[DragonCypher]

Sorry but can you explain that one a little better for me?


To fit in the scorp the gear lever bolts onto the box RIGHT above the shroud covering the driveshaft.. new box is a few inches away

But I was also under the impression that I couldnt swap over the mounts that the lever bolts onto, since it wouldnt line up

[Astron Boy]

LOL, I thought the Astron 80 was a 1.8L
Compiling all my data currently, but dont have anything on the 80.

[amgis_obrut]

LOL, I thought the Astron 80 was a 1.8L
Compiling all my data currently, but dont have anything on the 80.

4g51 was 1850cc Astron 80 is 2000cc the one thats in my G spec sigma has the oil gal plug in the head and another big plug in the side of the timing case

I was told the 80 is an unleaded import engine

[stealth]

the astron 80 was also standard in forklifts on duel fuel set up
cheers stealth

[Astron Boy]

LOL, I thought the Astron 80 was a 1.8L
Compiling all my data currently, but dont have anything on the 80.

4g51 was 1850cc Astron 80 is 2000cc the one thats in my G spec sigma has the oil gal plug in the head and another big plug in the side of the timing case

I was told the 80 is an unleaded import engine

ahhhh,

Was the 4g51 used in the old square shaped Hyundai Excel?

[leoca]

1987 Chrysler Conquest TSi (i.e.Widebody Starion)
ENGINE TYPEFour cylinder,SOHC,2.6-liter,MCA-JET turbocharged ,intercooled, electronically controlled fuel injection (ECI)
Bore and Stroke:3.59" times 3.86"
Fuel delivery:dual point throttle body fuel injection
Compression Ratio:7.0 to 1
Horsepower:176@5000 rpm
Torque:223lb-ft@2500 rpm
Turbo boost: 8.7 psi maximum

POWER TRAIN
Synchronised five speed manual overdrive transmission with reinforced driveshaft and rear limited slip differential
Axle Ratio: 3.54

[Paddles]

http://en.wikipedia.org/wiki/Mitsubishi_Astron_engine

Hope this helps.

Paddles

[MrBishi]

Starion G54BT Turbocharged 2.6
Exclusive to the United States, all other country variations were 2.0L Turbo and Japan offered an unpopular N/A variant
TD05-12A turbocharger
Fuel injection (Single point injection or TBI, same as Cordia)
Intercooler is found only on the latest model to come out in the States: ESI-R (Conquest TSi)

Some corrections are needed here.
The G54BT was available in Starions in the UK, Japan, Euro market and the US. For everywhere other than the US, they only came in widebody Starions typically from about '87 to '89, while the US had them from '83 to '89. No factory 2.6s in Australian delivered Starions.
All came with an intercooler except pre '87 US spec.
They did come with nitrided cranks and piston oil squirters (good!) but unfortunately used jet-valve heads (bad - crack city).
Compression ratio is low (from memory 7.8:1), but the small turbo makes it fairly easy to drive.

All are wideblock including automatic Starions.

[516MA]

i have a 2.0 litre auto does this mean i have a narrow block?

Nick

[81GL]

i have a 2.0 litre auto does this mean i have a narrow block?

Nick

Yes, no wide block 2lt's that I'm aware of.

Nick.

[516MA]

great thanks mate

[sigtool]

SO Silly question to ad but 94 TR magna 5 speed IS narrow block?

[Rallyant]

The oil pump on the US starions runs its pickup out the botom of the pump itself, down the front of the motor to the sump.

The first design in 2.6 astron, pre astron 1, whats that? an astron 0 i guess was in the Canters and forklifts and had no balance shafts and much better oil pumps (nice to retrofit to any 2.6
they also have bigger mains or big end, i cant remember what (i think mains)