Phase 1/phase 2 172 engine differences

[roland rat]

Hi all i've done a search but couldnt find the definative answer so thought i'd ask here.

Are the engines in the phase 1 172's the same as the phase 2 172's?

Im on the look out for a 172 and been offered a phase 2 172 what has sadly snapped its timing belt.Also i have a phase 1 172 engine availible to myself.

Basically will the phase 1 engine go straight into the phase 2 car?i understand that the phase 1 cars are "cable" operated and the phase 2 cars are "live by-wire" operated.

If i was to go ahead with the engine swap what types of problems would i have to overcome?

Many thanks Ash

 

[Daniel]

Nope.

Electric throttle on the ph-2 and cable throttle on the ph1

 

[roland rat]

Nope.

Electric throttle on the ph-2 and cable throttle on the ph1

So could i swap the electric throttle off the dead phase 2 engine onto the phase 1 engine to make it work?

 

[Daniel]

I don't think so mate, its not as simple as that as the throttle body is different.

Will be worth pm-ing Fred as i'm not that good on engines.

 

[Mike@Rentech]

Swop all the bits over from the original engine it should be fine, 182 engines also fit but require a slight mod on the breather system.

 

[roland rat]

I don't think so mate, its not as simple as that as the throttle body is different.

Will be worth pm-ing Fred as i'm not that good on engines.

Will do thanks mate

 

[Whiteley]

Swap the upper inlet/plenum and throttle body over from the ph2 engine onto the ph1. You'll need to retain the ph2 engine loom too for the DBW.

 

[Daniel]

Or Mike! Or Chris! lol!!

 

[sideways danny]

in terms of fitting, just use the plenum that matches the TB that you need, job done.

The Ph1 cylinder head ports are rather different to the ph2, normally see slightly better power from a ph1

 

[roland rat]

So it is possible?thanks guys!

 

[Greeny.]

in terms of fitting, just use the plenum that matches the TB that you need, job done.

The Ph1 cylinder head ports are rather different to the ph2, normally see slightly better power from a ph1

This is totally true, most milding tuned ones at our RR day the other month made better power than ph2 172's.

 

[Whiteley]

So it is possible?thanks guys!

Yep, sit both engines next to each other, swap necessary bits over, put back in, plug in, plumb in, go :approve:

 

[roland rat]

Yep, sit both engines next to each other, swap necessary bits over, put back in, plug in, plumb in, go :approve:

Thanks Guys thats great news!

 

[Alex_X93]

Apperently the ph2 heads were made from different cast mould (deisel) iirc.