trendy996

Does the flywheel and flex plate share the same bolt pattern to make them interchangeable?

Imo000

I'm 99% sure the engine is the same.

trendy996

As am I but I know Audi makes the crank to fw/plate bolt pattern different. I want to be sure before I buy a auto engine.

wwest

The EFI system will be different, as will the ECU module. There are different engine control aspects with a manual vs an automatic, sudden off-throttle, for instance, the engine w/automatic will have a different provision for this vs....

But "core", short block, will be the same.

Imo000

You mean long block. Short block is without the heads and long block is with it.


If you check on car-part.com, it doesn't ask the type of trnasmission. If it mattered, it would ask.

KrazyK

The cranks should be the same but the MT has a pilot bearing. Right?????

Imo000

The pilot bearing is in the flywheel.

KrazyK

I know, but I mean the crank bolt pattern is the same, right?

StephenB

It is the same engine. Porsche consolidated replacement engines in 2000. Only option for 2001 and earlier is e-gas vs. non-egas. There is a TSB which covers what does and does not get plugged for vac lines. Manual trans tie wrap the wiring for the ATF switch-over cooling valve. BTDT

trendy996

Ok thanks guys. Sounds like I will be ok in buying a auto.

txhokie4life

The water pump/thermostat housing is different.

StephenB

Pic of housing Txhokie mentioned (MT housing swapped for core return). Second pic is old Tip housing transferred to shiny new factory replacement. You will just need to swap your MT housing to the new engine. Very simple, only a couple of bolts.

trendy996

Thanks again Steve

Imo000

Just to be clear on this, the thermostat is not in the housing. That'just a coolant elbow.

bar

The cooling elbow posted is a year change, not related to transmission. If I remember correctly, late 03+ cars use a clip at that joint, earlier cars use hose clamps.

Alternator pulley (decoupling on manual cars) some engine mapping and a vacuum line are all I recall to be different between the two motors.