Chevy marine engine.

[James R]

A friend is in the process of rebuilding this motor, a 2.2 Litre 4 cylinder 1995 model.
The information paper that came with the new crankshaft refers to use with a motor that runs in reverse and the compatibility of seals.
Being an outboard man I am curious about this strange motor direction.
Can anyone clarify this for me.

 

[Don S]

Re: Chevy marine engine.

Never heard of a 2.2L 4 cyl Chevy marine engine. Got any pictures?

 

[cr2k]

Re: Chevy marine engine.

Whatever it is, unless it is a true reverse rotation (dual engine set up) engine he probably has the wrong crank. More information is needed. Pictures, serial numbers etc.

 

[Ike-110722]

Re: Chevy marine engine.

That's the same engine in my 2004 Cavalier and used in a lot of different Chevy, Saturn and GM models. Actually it's made by Opel in Germany. It's an excellent engine but I have never heard of a marine version. And why the reverse rotation? beats me.

 

[jerryjerry05]

Re: Chevy marine engine.

He might be saying. IF the motor should be a reverse rotation he would need different seals and bearings.
They used a 327 Chevy in older Owens and one motor was reverse rotation and it required special seals.
The regular seals would push the oil in a certain direction.Pushing it away from the bearings in the opposite motor.Resulting in a seized/burnt bearing/bushing.J

 

[Aloysius]

Re: Chevy marine engine.

Doesn't make sense. OHC engines can't be run backwards. Even pushrod engines, the stock pistons SHOULD be reversed, and cam thrust must be addressed.

All "reverse" marine engines use crank seals spiraled the opposite direction. or hatch marks on the rear main seal reversed.

 

[zbnutcase]

Re: Chevy marine engine.

KEM Equipment sold a 2.2L Ecotec Kodiac marine engine, but it was std rotation

 

[gbeltran]

Re: Chevy marine engine.

Doesn't make sense. OHC engines can't be run backwards. Even pushrod engines, the stock pistons SHOULD be reversed, and cam thrust must be addressed.

All "reverse" marine engines use crank seals spiraled the opposite direction. or hatch marks on the rear main seal reversed.

Why should the pistons be reversed? The valves are in the same spot.

 

[1fishbone]

Re: Chevy marine engine.

A friend is in the process of rebuilding this motor, a 2.2 Litre 4 cylinder 1995 model.
The information paper that came with the new crankshaft refers to use with a motor that runs in reverse and the compatibility of seals.
Being an outboard man I am curious about this strange motor direction.
Can anyone clarify this for me.

Probably a 'generic' piece of paper that gets tossed into every box just to refer to using the compatibility of seals.
Serial number and/or side by side comparison is needed to confirm the correct answer/comparison.

 

[proshadetree]

Re: Chevy marine engine.

This engine is also used in forklift applications. Bad to have valve seats beat out of the heads. Generators and welders using gasoline seem to not be affected by valve issues. They do rotate in different directions per usage. So yes an overhead cam engine can be made to run backwards. Crankshaft, camshaft, and timing set all carry different numbers per rotation.

 

[redjmp]

Re: Chevy marine engine.

So yes an overhead cam engine can be made to run backwards. Crankshaft, camshaft, and timing set all carry different numbers per rotation.

An overhead cam that uses a chain or belt with an idler pulley can NOT be made to run backwards.
Unless there is a way to install the idler pulley on the other side, the belt or chain would soon jump off the gears...

It would be like trying to peddle a 10 speed bike backwards (assuming you could jam or ratchet the freewheel the opposite direction)

 

[proshadetree]

Re: Chevy marine engine.

Think why would the timing set carry a different number. Some thing are as obvious as a big red truck

 

[redjmp]

Re: Chevy marine engine.

Think why would the timing set carry a different number. Some thing are as obvious as a big red truck

Idler pulley can NOT be on the driven side and under load.


Perhaps the timing set numbers are for a different reason?

Or maybe its a direct gear to gear system without a belt or chain?

Or perhaps that engine doesn't use an idler pulley?

 

[proshadetree]

Re: Chevy marine engine.

Single overhead cam run with a belt. and yes it moves the load side of the belt to coincide with rotation. More complicated than conventional but still doable. Check GM industrial engines 1800 for a new standard rotation engine. This is truly a disposable engine. Clear as mud.

 

[Don S]

Re: Chevy marine engine.

Until the OP actually comes back and tells us exactly what he is working on, this discussion is all just a bunch of speculation and means nothing as far as an answer to his question.

 

[James R]

Re: Chevy marine engine.

I'M BACK.
In checking further with the "Friend", who didn't make himself very clear.
The motor he is working on is in fact and auto engine. The question was prompted by, as you said, a piece of paper in the replacement crank shaft package referring to use in a marine engine.
From this I gather that these motors, or a motor using the same crankshaft, are rigged for marine use.
The paper refers to using a different seal configuration for reverse rotation.
Sorry for the confusion but we all got some useful info out of it.
Thanks guys.

 

[mtrainTurbo]

Re: Chevy marine engine.

I'M BACK.
In checking further with the "Friend", who didn't make himself very clear.
The motor he is working on is in fact and auto engine. The question was prompted by, as you said, a piece of paper in the replacement crank shaft package referring to use in a marine engine.
From this I gather that these motors, or a motor using the same crankshaft, are rigged for marine use.
The paper refers to using a different seal configuration for reverse rotation.
Sorry for the confusion but we all got some useful info out of it.
Thanks guys.

If it came out of a car, it's not a boat engine. Period.

It sounds like its the 2.2L version of the Iron Duke:

http://en.wikipedia.org/wiki/GM_122_engine#2200_OHV

The 3.0L version of this engine is what you see in the current stern drive lineups (Merc and Volvo).

Tell him to go buy a real 3.0L marine engine and start again.

 

[Bondo]

Re: Chevy marine engine.

The 3.0L version of this engine is what you see in the current stern drive lineups (Merc and Volvo).

Nope,... No it Ain't.... No lineage to the Iron Duke, the Pontiac 2.5l....

The Marine motors We see are of a Chevy heritage... Different platform altogether...

Tell him to go buy a real 3.0L marine engine and start again.

It appears to Me, they're putting a new motor in a Car, 'n were curious about the piece of paper they found in the box...

 

[proshadetree]

Re: Chevy marine engine.

3.0 is also an industrial engine, used in forklifts, boom trucks, generators, ect. Renda also makes the diagnostic equipment for those also

 

[Aloysius]

Re: Chevy marine engine.

Why should the pistons be reversed? The valves are in the same spot.

Piston pin offset.