Tool challenge Answer/

Hello,

Determined got it right! It is used to locate TDC on Cat engines. I also made a timing pin for the pump. The tool makes it a one man job finding TDC. Does this method find #1 TDC every time?

Guido.

genius

(quoted from post at 10:08:45 11/22/15) Hello,

Determined got it right! It is used to locate TDC on Cat engines. I also made a timing pin for the pump. The tool makes it a one man job finding TDC. Does this method find #1 TDC every time?

Guido.

Click to expand...

Yes but not necessarily on the compression stroke unless your method includes the use of the pump pin at the same time.
Amazing what people can come up with when working alone.

Hello determined,

Just got back. What do you mean not necessarily! The pin will put the piston on TDC every time. The pump pin is to put the pump on #1 to time it to the engineThat is on#1 pump is a distributor type pump with six fuel lines. Does the pin always put #1 at TDC? that was my question. If not explain why. I think I know the answer..

Guido

Hello Chuck,

My arms are not long enough to reach the crank bolt from the flywheel housing........ sooo, I needed to come up with a solution. Help was not always there. So necessity is the mother of all inventions.I Should have obtained an official document conferring me sole title? AKA a patent?

Guido.

(quoted from post at 19:22:51 11/22/15) Hello determined,

Just got back. What do you mean not necessarily! The pin will put the piston on TDC every time. The pump pin is to put the pump on #1 to time it to the engineThat is on#1 pump is a distributor type pump with six fuel lines. Does the pin always put #1 at TDC? that was my question. If not explain why. I think I know the answer..

Guido

Click to expand...

The first part of my answer to your question was yes as in yes your tool will always put #1 at TDC.
The not necessarily part referred to #1 being at TDC on compression stroke vs #1 at TDC on exhaust stroke.
Using the tool you made and assuming you could insert your pump pin when the pump is mounted on the engine you could confirm you are at TDC on the compression stroke without pulling a valve cover.

Hello determined,

The pin will ALWAYS put #1piston @ TDC, BUT not on the compression stroke every time. You
need to take the valve cover off to verify that. One and six are companion cylinders, But
180* apart in the stroke cycle.So if one is on the compression stoke. #6 is the blank
stroke. Fill in the blank................

Guido.

(quoted from post at 09:52:16 11/23/15) Hello determined,

The pin will ALWAYS put #1piston @ TDC, BUT not on the compression stroke every time. You
need to take the valve cover off to verify that. One and six are companion cylinders, But
180* apart in the stroke cycle.So if one is on the compression stoke. #6 is the blank
stroke. Fill in the blank................

Guido.

Click to expand...

When cyl #1 completes the compression stroke and reaches TDC
cyl#6 completes the exhaust stroke and reaches TDC.

Technically they are 360 degree apart in a 720 degree cycle.

If we were playing with a 6-71 in this conversation
1 and 6 would be a true 180 degree apart.
cyl # 1 piston is at TDC at the same time cyl# 6 piston is at BDC.

Hello determined,

You are right about #1 and #6 in the sequence the are. Here is my understanding of the
4cycle engine. I use the most common firing order for an inline 6 cylinder four stroke
cycle engine
On a 6 cylinder 4cycle engine with a firing order of 153624 1-6; 2-5; 3-4,are the
companion cylinders. When #1cylinder is in the compression stroke,TDC #6 is in the
exhaust stroke TDC. THEY ARE THEN 2 cycles apart. It takes 360degrees,of crankshaft
rotation to fire 1/2 the cylinders. This means that each cylinder wood be120 degrees
apart. It takes 360 of crankshaft rotation to fire,complete the 4cycles, on
1/2 of the cylinders in a 4 stroke/cycle engine. Each cylinder would be 120 apart in the
firing stroke. It takes another 360 degrees of crankshaft rotation to fire the other
cylinders. So it takes 720 degrees of crankshaft rotation to complete the firing of all
cylinders in alll four cycle engine. Simply put we wood have 6 power strokes occurring
within two cranckshaft rotation on the sample engine. Each cycle takes 120 degrees of
crankshaft rotation to complete. One cylinder or six, it takes 720 degrees of crankshaft
rotation to complete the firing on a Four stroke cycle engine. There are no companion
cylinders in a two stroke/cycle engine,

Guido.

While on the topic of 6 cylinder engines.
What engine am I working on in the shop right now.

-6 cylinder
-Firing order 1-4-5-2-3-6
-North American
-4 stroke
-Gasoline powered
-150 HP

Hello,

I just wanted to add more about companion cylinders. They travel up and down the engine bore at the same height regardless of crank position. One thing To mention, most of the engines, even V8's have 1 and 6 as companion cylinders. I really don't know why?





Guido.

(quoted from post at 12:20:25 11/24/15) While on the topic of 6 cylinder engines.
What engine am I working on in the shop right now.

-6 cylinder
-Firing order 1-4-5-2-3-6
-North American
-4 stroke
-Gasoline powered
-150 HP

Click to expand...

I believe that would be a Lycoming aircraft engine.

(quoted from post at 23:21:58 11/24/15)

(quoted from post at 12:20:25 11/24/15) While on the topic of 6 cylinder engines.
What engine am I working on in the shop right now.

-6 cylinder
-Firing order 1-4-5-2-3-6
-North American
-4 stroke
-Gasoline powered
-150 HP

Click to expand...

I believe that would be a Lycoming aircraft engine.

Click to expand...

Sorry hot wrench it's not a Lycoming but it does have a Marvel Schebler carb on it.

(quoted from post at 13:42:51 11/25/15)

(quoted from post at 23:21:58 11/24/15)

(quoted from post at 12:20:25 11/24/15) While on the topic of 6 cylinder engines.
What engine am I working on in the shop right now.

-6 cylinder
-Firing order 1-4-5-2-3-6
-North American
-4 stroke
-Gasoline powered
-150 HP

Click to expand...

I believe that would be a Lycoming aircraft engine.

Click to expand...

Sorry hot wrench it's not a Lycoming but it does have a Marvel Schebler carb on it.

Click to expand...

Well, that was a WAG, how about a Continental boxer? They also had an odd firing order if I recall.

(quoted from post at 18:10:56 11/25/15)

(quoted from post at 13:42:51 11/25/15)

(quoted from post at 23:21:58 11/24/15)

(quoted from post at 12:20:25 11/24/15) While on the topic of 6 cylinder engines.
What engine am I working on in the shop right now.

-6 cylinder
-Firing order 1-4-5-2-3-6
-North American
-4 stroke
-Gasoline powered
-150 HP

Click to expand...

I believe that would be a Lycoming aircraft engine.

Click to expand...

Sorry hot wrench it's not a Lycoming but it does have a Marvel Schebler carb on it.

Click to expand...

Well, that was a WAG, how about a Continental boxer? They also had an odd firing order if I recall.

Click to expand...

Not a Continental either.
First produced in the 1940's this engine is currently being brought back into production.
Equipped with a Delco Remy generator.

A Franklin aircraft engine? Stinsons used them, I think.

Garry

GarryinNC you nailed it.
A Franklin 6A4-150
Mine is mounted on a 1940's Fudge Snow Sedan
Basically an airboat with skis designed to travel on snow.

Well, I was headed in the right direction anyway.

(quoted from post at 21:13:29 11/25/15)
Well, I was headed in the right direction anyway.

Click to expand...

Hotwrench
You were mighty close I thought your next guess was going to be bang on.
I have another 6 cylinder engine here in a 54 Jaguar it has the 1-5-3-6-2-4 firing order but they call the back cylinder at the firewall #1
When you draw it out on paper it works out the same but just like the steering wheels they do things a little different than over here.