Thread: Is this a Series three Stage 1 3.9 Isuzu

Originally Posted by Col.Coleman

I just read your other post, and you learn something new every day

No bolts, but definate flat blank castings where they should be. They are not evident on the photo on the motor in question, so the more I look at the photo's the more I think it is the common series conversion of the 2.8l isuzu.


CC

You do learn something new every day. The grainy B&W photo of the engine in the road test article showed what I thought were bolts but now that you mention blank castings that's exactly what they are.

Rob W

Originally Posted by isuzubob

You do learn something new every day. The grainy B&W photo of the engine in the road test article showed what I thought were bolts but now that you mention blank castings that's exactly what they are.

Rob W

The acoustic cover uses a steel inner rocker cover, not the aluminium one pictured.
The aluminium is for the early industrial versions of the 4BD1. Every automotive (truck) 4B series Isuzu has a two piece steel cover.

The hump at the back of the acoustic cover is for a PCV valve system which is not used on the industrial motors, the industrial ones have the breather out the cam inspection cover.

Originally Posted by Dougal

No chance of it being the 2.8
The 2.8 exhaust is on the other side.

???
Pretty sure you are wrong on that one.

This is a 4BA1 (2.8).


I agree with col. Looks like a conversion from a 2.25D to a 2.8 isuzu.

If the grille is in the original spot, it most likely has the original series gearbox in there. I have seen 4BA1, 4BC1/2 and 4BB1 conversions

If the above is true, none of the bits will be any use, but at least the engine and the adaptor plate are worth something...

Originally Posted by Dougal

The acoustic cover uses a steel inner rocker cover, not the aluminium one pictured.
The aluminium is for the early industrial versions of the 4BD1. Every automotive (truck) 4B series Isuzu has a two piece steel cover.

The hump at the back of the acoustic cover is for a PCV valve system which is not used on the industrial motors, the industrial ones have the breather out the cam inspection cover.

I think you are wrong on that too. I know people who have bough ex-truck 4BD1s, and they have had the alloy cover under the steel acoustic cover.

Here is a genuine 4BD1 early industrial motor, factory fit in a Stage1.





CC

Originally Posted by isuzurover

???
Pretty sure you are wrong on that one.

This is a 4BA1 (2.8).


I agree with col. Looks like a conversion from a 2.25D to a 2.8 isuzu.

If the grille is in the original spot, it most likely has the original series gearbox in there. I have seen 4BA1 and 4BC1 conversions

If the above is true, none of the bits will be any use, but at least the engine and the adaptor plate are worth something...

Yes the 4BA1 is 2.8 litres, but have you ever found one? The only reference I've been able to find was a jeepney in the Phillipines.

It's the 4JB1 that i was talking about the exhaust side, I should have made that clear. Colemans reference to the "more common conversion" is why I went 4JB1, the 4BA's don't fit the "common" part.

You will need a completely flat acoustic cover to have an aluminium one underneath. If it's got a hump then it's steel.

Originally Posted by Dougal

Yes the 4BA1 is 2.8 litres, but have you ever found one? The only reference I've been able to find was a jeepney in the Phillipines.

It's the 4JB1 that i was talking about the exhaust side, I should have made that clear. Colemans reference to the "more common conversion" is why I went 4JB1, the 4BA's don't fit the "common" part.

You will need a completely flat acoustic cover to have an aluminium one underneath. If it's got a hump then it's steel.

I often see small isuzu trucks of the correct vintage with 2.8 on the side driving around.

The local perth truck wrecker list one in stock (near the bottom)
ISUZU TRUCK PARTS

I have never seen a series conversion using a 4JB1 in OZ, however I have seen plenty of C240 conversions, heard of a few 4BA1 conversions, and tried to buy the engine and adaptor from a 4BC1/2 converted series.

EDIT - here is one for sale with a 4BA1
http://criseramachinery.com.au/Deskt...1&TabID=204949

Originally Posted by isuzurover

I often see small isuzu trucks of the correct vintage with 2.8 on the side driving around.

The local perth truck wrecker list one in stock (near the bottom)
ISUZU TRUCK PARTS

And it's done over a million km too.

Originally Posted by isuzurover

I have never seen a series conversion using a 4JB1 in OZ, however I have seen plenty of C240 conversions, heard of a few 4BA1 conversions, and tried to buy the engine and adaptor from a 4BC1/2 converted series.

EDIT - here is one for sale with a 4BA1
Don Crisera Machinery Truck Dealers - IHub Australia

When they went to the NPR models in 85 they switched to the 4JB1 in the 1.5 and 2 ton trucks. That TLD44 would be one of the last of the non-npr's.

The 4JB1(T) conversions are common outside aus where the 4BD1T parts aren't easily sourced, you can buy bellhousing kits from the uk.