Isuzu starter motors

[isuzuscott]

G'day all,

I have had enough of pulling out my starter and doing half assed rebuilds. I got a quote for a new one. 12v 2.3kW 9 tooth ccw jobby for $530. Seems a bit steep. I don't have dual battery so I can't run 24v. Anyone want to shed some light on starter motors. I see some previous threads talking about overseas suppliers.

[Vern]

Anymore info scott? Is yours an Isuzu truck one or a landy one??

[steveG]

Just had a quick look on ebay, and apart from the usual suspects from USA, there's this local supplier with 5 year warranty for $400
Specs say its 11T and CW but you've said 9T and CCW so I'm not sure which is correct.

Starter Motor Fits Landrover 110 3 9L Diesel 4BD1 Engine 1984 TO 1994 | eBay (http://www.ebay.com.au/itm/Starter-Motor-fits-Landrover-110-3-9L-Diesel-4BD1-Engine-1984-to-1994-/301199189600?pt=AU_Car_Parts_Accessories&hash=item4620dee660)

Search ebay on "4bd1 starter" from seller Auto8 if the link dies in the future.

Steve

[workingonit]

I'm using a new JAS Oceania - eJAS Home (http://www.jasoceania.com.au) The websites not much help unless you register.

Reading off the box - model SNJ004 12v 2kw 9 teeth clock wise (CW), suiting denso, application holden Jackaroo, Rodeo. Haven't run it yet as my vehicle is in pieces.

My engine is from a truck - going into a RRC chassis - missing 12v alternator and starter (it actually came with a 24v alternator). I was buying an adaptor from Outcast in Brisbane so I asked them what alternator and starter they were fitting to their RRC conversions and asked them to get the same.

Dummy fit gives about 10-15mm clearance between starter and chassis.

[Ancient Mariner]

4bd1 are CW starters I would have bet money on it being 11 teeth:o maybe different flywheels used? The 4he1 are 11xCCW as they are mounted to the rear of the bellhousing .The 4bb1 in my boat is
CW x 11

AM

[isuzuscott]

Should have put a bit more detail in my first post.

My truck is a 4be1 in an 85 county. I am going off what starter is in it at the moment.

[workingonit]

Looking on ebay I can only see 11 teeth. Does it matter if 9 or 11 as long as same modulus or pitch or what ever?

[Dougal]

There are different ring gear sizes to fit with 9t or 11t.

[workingonit]

Any information on this. For example, is the ring for the 9 tooth common to the LRover units and the 11 tooth to the truck, or vice versa.

I'm not an expert on this and what I did understand is rusty :) I have a module 1 set of gear cutters - 8 cutters to the set from memory. Not precise but by way of example, the first cutter is used to cut a gear containing 11 to 13 teeth, the next cutter for 14-16...the final cutter for a gear or rack with 30 or more teeth. So you can have a varying number of teeth. The small gear can have 11 or 12 or 13 teeth and will run with a larger gear having say 25 or 26 or 27 teeth. I believe if they have the same form and pressure angle the number of teeth can vary but they will run happily. Happy to have someone with industry experience chime in here...please!

[Dougal]

Any information on this. For example, is the ring for the 9 tooth common to the LRover units and the 11 tooth to the truck, or vice versa.

It appears to be 9T on the truck engines with 2 bolt starter motors.
11T on the truck engines with the 3 bolt starters.

Info here:
Isuzu Starter Info (http://www.4btswaps.com/forum/showthread.php?15935-Isuzu-Starter-Info)

The US engines all got 12V starters with the 3 bolt mount.

Somewhere on 4BTswaps.com there was a count-up of flywheel teeth on the ring-gears. I haven't had time to search it out.

[isuzurover]

I just checked my landrover oem version and it is 11t.

[workingonit]

Much appreciated Dougal.

Mine is a two bolt truck engine, so looks like I'll be OK with a nine tooth. I have to remove the engine later this week and disconnect it from the gearbox, so I'll figure some one way holding the throw out on the motor so I can hand crank to check smooth operation in the ring gear.

[Boof Ed]

The flywheel I got from wreckers had a different tooth count to the original Landy flywheel. (can't remember numbers sorry) the wreckers one had a badly damaged gear from loose starter. I end up using the Landy flywheel and a two bolt 12v truck starter front different truck. So I would suggest mix n match is ok, but don't know what tooth count I'm running. I just ran the gears round each other while out of vehicle, seemed smooth, crossed my fingers and it worked.

[workingonit]

Tried following up on Dougals comments about tooth count differences and found this link - with Dougals finger prints all over it of course :) Not sure if its what Dougal is referring to. May not really help much as it compared the 6bd1 and 4bd1 fly wheels, unless of course they were interchangeable, depending to which country the NPR truck was sent ie US or Oz.

6BD1 vs 4BD1T Flywheels and Housings (http://www.4btswaps.com/forum/showthread.php?23734-6BD1-vs-4BD1T-Flywheels-and-Housings)

Dougal, you mentioned wanting a heavier fly wheel. In that link, it talks of the compatibility of the 6bd1 flywheel to the 4bd1 engine and that it is heavier than the original 4bd1 flywheel. Have you considered it - down side? ie not commonly available, machining required, to big for the bell housing?

PS just done some more reading. You mentioned this "The Australian 4BD1 and 4BD1T landrover market however is just getting around to fitting Isuzu OD gearboxes as the landrover items get more and more scarce A heavier flywheel for them will be snapped up, especiall since many have landrover flywheels fitted and need an Isuzu replacement anyway". Is the truck engine flywheel different to the LRover supplied fly wheel in terms of weight? http://www.4btswaps.com/forum/showthread.php?19294-4BD1-2T-Flywheel-Sources

[Dougal]

Tried following up on Dougals comments about tooth count differences and found this link - with Dougals finger prints all over it of course :) Not sure if its what Dougal is referring to. May not really help much as it compared the 6bd1 and 4bd1 fly wheels, unless of course they were interchangeable, depending to which country the NPR truck was sent ie US or Oz.

6BD1 vs 4BD1T Flywheels and Housings (http://www.4btswaps.com/forum/showthread.php?23734-6BD1-vs-4BD1T-Flywheels-and-Housings)

Dougal, you mentioned wanting a heavier fly wheel. In that link, it talks of the compatibility of the 6bd1 flywheel to the 4bd1 engine and that it is heavier than the original 4bd1 flywheel. Have you considered it - down side? ie not commonly available, machining required, to big for the bell housing?

PS just done some more reading. You mentioned this "The Australian 4BD1 and 4BD1T landrover market however is just getting around to fitting Isuzu OD gearboxes as the landrover items get more and more scarce A heavier flywheel for them will be snapped up, especiall since many have landrover flywheels fitted and need an Isuzu replacement anyway". Is the truck engine flywheel different to the LRover supplied fly wheel in terms of weight? 4BD1/2T Flywheel Sources (http://www.4btswaps.com/forum/showthread.php?19294-4BD1-2T-Flywheel-Sources)

In that link is a short SAE #3 housing which was sold on US based engines compared to the stanard 4BD1T truck bellhousing. The SAE #3 item is not really an obtainable part.

The industrial 4BD1T catalogue I have shows about 8 different flywheels. But the different configurations of ring-gears and thickness mean I couldn't guarantee fitment without modes even if I found a suitable one. So instead I'll be bolting an inertia ring to my existing one eventually. This will roughly double the inertia which is more than any of the other automotive flywheels will do.