Straight 6 Cylinder Engine

[Sprocket]

I got the new timing belt I ordered and installed it today. It has the same number of teeth and they are of the same distance apart as the original belt had but it could have been 2 teeth shorter. I just moved the belt tightener over to compensate.
I had two of the original belts and I tossed them both in the garbage. I still don't know what they are for but now they won't mess with me again.

This time when I set the valve timing everything worked as it should.
View attachment 157928

I then set the ignition timing and tested for spark using this plate.
View attachment 157929

All that worked out fine so I made up and installed the plug wires.
I also made three wire standoffs to support the longer plug wires.
View attachment 157930

Thanks for looking
Ray

Can’t be much more to do before it runs! Looks good.
Doug

 

[Lloyd-ss]

This has come together incredibly quickly, based on my very limited efforts. Nothing like experience to make the job go faster.... and smoother.
Lloyd

 

[Rdean33422]

Can’t be much more to do before it runs! Looks good.

Thanks Doug
Not too much left but it will still take some time.

Thanks Lloyd that's very kind.
Ray

 

[Rdean33422]

I decided to work on the exhaust next. The local hardware store has some 5/16" inside diameter tubing with a wall thickness of 0.014 that has a gold finish and kind of looks like brass. A 3 foot piece is $7.49 so you can tell it isn't high quality stuff but I fill the pipe with a low melting point metal before bending.
This is a my bender I made a couple of years back and works just fine.


All six pipes installed.


I also cut, sanded, stained, and finished a piece of poplar for the base.
It should be ready for tomorrow.


Thanks for looking
Ray

 

[petertha]

Nice, Ray. What kind of ignition module are you using to drive through the distributer?

 

[Rdean33422]

I use this module but with a different hall sensor for my distributor type models.
Thanks for asking
Ray

 

[Rdean33422]

Lawn work this morning but I did get the engine mounted and 4 rubber feet mounted under the board.


Thanks for looking
Ray

 

[Rdean33422]

Many things came together today and the cooling system is declared complete.

This is the cooling water header tank.


Installed the radiator and fan.


I hooked up the hoses and added some antifreeze.


Would you believe it there were no leaks.
The pump moves a good stream of water even at 600 rpms so we will see how it does keeping the engine cool.
The radiator fan is powered by a wall wart.

Thanks for looking
Ray

 

[kuhncw]

Ray, congratulations on a very nice looking inline six and supporting systems. Well done. (and quickly)

Chuck

 

[Rdean33422]

Thank you Chuck for the kind words. Now if it will run as good as it looks.
The fuel system is next.
Ray

 

[Rdean33422]

I attached a brass weight to the carb throttle arm so it would stay in the idle position. I added a brass bit to the idle adjustment screw so you could adjust it with your fingers. This is the same setup I used on the 4 cylinder model and it worked very well.


Sorry I only got a picture of the assembled gas tank. It is about twice the capacity of the tank on the 4 cylinder.


Getting very close now just the electronics left.

Thanks for looking
Ray

 

[minh-thanh]

Many things came together today and the cooling system is declared complete.

This is the cooling water header tank.
View attachment 158081

Installed the radiator and fan.
View attachment 158082

I hooked up the hoses and added some antifreeze.
View attachment 158083

Would you believe it there were no leaks.
The pump moves a good stream of water even at 600 rpms so we will see how it does keeping the engine cool.
The radiator fan is powered by a wall wart.

Thanks for looking
Ray

Very impressed with the project, and very fast..

 

[Rdean33422]

Thank you Minh

This is a piece of poplar that I am cutting out for the electronics box on the big router.


Sanded, stained, and finished with spray poly.


Here it is mounted to the board with an aluminum cover and a off/on switch.


Thanks for looking
Ray

 

[Rdean33422]

Yes it does run but there are some issues that I want to iron out first before the video.

The cooling system is working better than I expected except for the radiator fan. It is really wimpy so I have another fan on order.

Number 5 cylinder is not contributing anything it is just along for the ride. I may have to pull the head to see whats wrong.

The distributor drive gear is slipping on the cam shaft. I thought it was a tight enough fit and didn't need a set screw. Boy was I wrong.

The hall sensor was giving me a fit. Even though it is the same that I used on both of my 4 cylinder engines it would not work on this engine. The engine would start up and run for maybe 5 seconds and then the sensor was toast. I tries several different sensors and none worked for more than a couple of minutes. My friend had purchased the same number sensor but it was a Honeywell brand. That did the trick so far as we ran three tanks of gas through it today.

It may take a few days to get it all sorted but there will be a video.

Thanks for looking
Ray

 

[Rdean33422]

I pulled the head today to see what was wrong with number 5 cylinder. I mounted the head on the valve test plate and applied 60 pounds of shop air. I expected that the exhaust valve was the culprit and needed some more lapping. But there were no leaks from either valve they were good. I checked for suction on number 5 cylinder and that was good also. After close inspection I noticed that the intake valve springs on number 5 and 6 cylinders were different from the rest. I had trouble finding the intake springs and had went to several hardware stores to purchase them. These two springs were much too stiff so I rummaged through all my junk drawers and found two that would work.
As long as I had the head off I made a new head gasket from the same material that I had used on many of my other models but not originally on this model. The suction on number 6 cylinder was not that great so I removed the piston and rod and replaced the o-ring on that cylinder.

The hall sensor is doing fine.

Well here it is.


There is still some tuning to do and I realized that I had never adjusted the ignition timing as it is till on TDC.

Thanks for looking
Ray

 

[Sparky_SC]

Fantastic ! A couple questions, what is the fuel? What do you use for head gasket material?

 

[Rdean33422]

I use Colman fuel with a little bit of WD40 added.
I have used a slick sided card stock used for artist painting on all my models.

Thanks for asking
Ray

 

[minh-thanh]

A Great project .
Progress has been made quite quickly , 6 cylinders are like 1 cylinder : easy and always running
Thank you for sharing !

 

[petertha]

Fantastic Ray, way to go!

 

[Longboy]

A real gem of modeling. I'm a fan of open cranks and valve trains and looks great in Chevy orange.
Dave.