What's inside the Indian Listeroid ?
These engines beg to be taken apart, I don't know how you could get more basic, you'd have to work real hard at messing something up, the perfect engine for the mechanically challenged to work on ? I think so...
Maybe it's time for a bit of a warning, anytime you have an open flywheel, you have a hazard. Considering how Liberal things have gotten in the great OLE USA, this may be a real problem. When you see Attorneys litigate against McDonalds for not warning people that's American fries shouldn't be eaten at every meal, you know things are bad. With this said, it is my position that this is an engine for educational purposes only, you should never try and run one,.... you could hurt yourself or the ones you love. Also NOTE... If you haven't removed your lawn and replaced it with a non skid surface, you could loose everything with one slip of an unwanted solicitor. Personal responsibility may be a thing of the past.
I'd bet that I could pull the head, and have both valves sitting on the bench in less than 5 minutes.
Another nice thing is the tools you don't need, a Crescent Wrench, 3/4 inch breaker bar,1 1/8 inch socket, and a screw driver will get most things done. Add to that a cylinder hone, and you might do a complete rebuild.
The Intake and exhaust use the same valve. The face measures 1.475 inches across, and the valve stem is a massive .435 inches! With spring pressures this low and valve guides this massive; they should never wear out.
See the little frown under the valves? That's the passage to the pre combustion chamber. In the earlier days, engines were fitted with the CS (cold start valve). According to some folks I've talked to, this option doesn't buy nearly as much as it did due to vastly improved injector nozzles and spray patterns. With the diminishing returns on investment, the Indians have decided to drop the option. This engine is equipped with a 'plug" that screws into the side of the head where the valve once was. I believe this opening has been retained to provide replacements for the older models AND to facilitate the forming of this pre-combustion chamber during the manufacturing process.
I would think that this plug could be modified to decrease the volume inside the pre combustion chamber, this might add efficiency if you were running this engine in the higher elevations where a higher compression would be an advantage.
The injection pump carries the MICO name which equates to Indian Bosh. I think this head is superior to some castings I've seen from India, the coolant passages and the inside of the head looks as good as anything GM was making in the 50s, and early 60s (their best years from a rebuilder's view point) with plenty of metal, and thick decks. Sorry about the outside... should have taken pictures before I took my die grinder to it, but it may have been too dark to show well.
Above left, a view of the intake and exhaust layout. Middle picture shows the water coolant passage. Note the slot to the left of the coolant outlet, this makes room for the injector. To the right we have the cylinder block which sits on top of the crank case. As you might be able to see in these pictures, the sleeved Listeroid engine looks to have been put together and machined with some care. The inside of the castings are very nice. Notice those studs, they are nearly 3/4 of an inch in diameter, torque the heads at 160-170 foot pounds!
This engine had been load tested after assembly, and from the looks of things, the engine had been run for at least 1/2 hour.
I invited Randy Allmand, (My machinist and Motor Head Friend) over to check out the valves, we looked at the valve face and the seats at 6X magnification and didn't find any problems, but since this engine is so fun to mess with , we hand lapped the valves.
I started the die grinder up and lightly cleaned up the intake and exhaust ports, the grinder is fun to use, next thing I knew; I was polishing the beams on the rocker arms, then it was the cam cover, the rocker shaft block. It's addictive, don't buy a die grinder unless you can control your urge to polish everything, you'll drive your Wife and your Dog nuts!
The cylinder sleeve has a nice hone job, I resisted the urge to pull the piston.
Another thing I will always check on these engines is the lifters, you can see the tops from the outside and can prove that they are rotating properly. If you find an engine that has a non rotating lifter, I'd make sure to pull the lifter and see if you can determine why, it's an easy thing to do.
Since this design uses external lube for the valve train, I looked it over pretty good. Several things to note, the rocker arm is bushed, both ends of the rocker assembly are replaceable, the valve runs a metal cap. If you NEVER lubed this assembly and managed to damage it, you could easily replace all wear parts. As I have mentioned elsewhere, the Indians have found that this arrangement survives with very little lubrication, they have abandoned the grease type rockers all together.
A noteworthy thing is the removable cylinder that sits on top of the crank case. The cylinder itself can be easily removed and taken to the bench where you could easily remove the sleeve from the bottom side. This design provides excellent access to everything, it's no wonder that this engine was still being produced in the UK through 1987. No doubt the amount of raw materials and the cost of shipping had something to do with Lister's decision to stop producing it.
This picture doesn't really convey the massiveness of the rod