Help what engine is this???

[99ctehan]

1971 Porsche 911 T
Due to a cruel twist of fate, a man that my father laid off drained the oil from his1971 911. 10 miles later, some fire, some dangling aluminum, etc, etc...
Implicitly, my father trusted an import mechanic to drop in a rebuilt motor.
The crankcase has 911.101.101.3r (left side)
The other side has 911.101.102.2r (right side)

I know 911-Model
1- 1971?
0?-uh oh
1-?
101- targa?
2R?
It had 10K on it before the Zeniths went south. What is this thing? I cant find it in the databases.
Thanks,
Chris

[haycait911]

look for the engine type number, stamped into the horizontal boss on the right of the fan.

[tonythetarga]

Originally Posted by 99ctehan

1971 Porsche 911 T
Due to a cruel twist of fate, a man that my father laid off drained the oil from his1971 911. 10 miles later, some fire, some dangling aluminum, etc, etc...
Implicitly, my father trusted an import mechanic to drop in a rebuilt motor.
The crankcase has 911.101.101.3r (left side)
The other side has 911.101.102.2r (right side)

I know 911-Model
1- 1971?
0?-uh oh
1-?
101- targa?
2R?
It had 10K on it before the Zeniths went south. What is this thing? I cant find it in the databases.
Thanks,
Chris

Those are casting numbers. As haycait says, look to the right of the fan on the lower right vertical casting. There will be an engine serial number there and just behind it on the engine block will be another number, engine type. It will be a 5 digit number arranged like this xxx/xx. You want to post both of those.

edit: check this thread for photo of location for engine serial number.
engine serial number

[99ctehan]

Originally Posted by tonythetarga

Those are casting numbers. As haycait says, look to the right of the fan on the lower right vertical casting. There will be an engine serial number there and just behind it on the engine block will be another number, engine type. It will be a 5 digit number arranged like this xxx/xx. You want to post both of those.

edit: check this thread for photo of location for engine serial number.
engine serial number

Thanks for the advice... It is a 2.2 liter 6. Correct for the car but without matching numbers. Your advice was spot on and thanks. Oh well. Maybe I can get more than 130 hp out of her. Or maybe I can just get it running.


Thanks,
Chris

[Walt Fricke]

What do you mean by "without matching numbers?"

My understanding is that from time to time, perhaps based on production runs, when the casting dies wore out, etc, the casting numbers can vary from side to side on an original engine.

However, if you remove the plastic air ducting cover from the engine (a real pain with the engine in the car - not really feasible) or pull the alternator and use lights and mirrors, you should see a three digit number stamped into each side somewhere along the parting line area - the case centerline. These are about 10" back from the end of the case, on one of the "bumps" along the parting line. I just measured. One will be stamped on top of one side, and one on top of the other side of the flange. These should match, and indicate that the castings, when assembled and machined before further manufacture, were to go together. Sort of like the numbers on connecting rod bodies and caps. These numbers have no other significance, but tell you if the right and left sides are a match.

If these match, not to worry a bit.

Walt Fricke

[tonythetarga]

Interesting info Walt. I thought he meant matching engine and VIN, which we know did not happen. The only way to know if that engine came with that car from the factory is to get a Certificate of Authenticity from PCNA. (but sometimes those aren't exactly right either, as many have attested)

[Walt Fricke]

Tony

I bet you are right. Shows just how much (that is, little) attention I pay to original parts on an old Porsche. I got fixated on the different case castings, and Chris is already moving on.

Walt

[99ctehan]

Thanks fellas!
Please forgive the difficulty in my understanding of such an odd numerical system. I am sooooo used to working on old American cars, Grosse Deutschland's approach is a bit... foreign. Cadillac is tricky, Pontiac is easy, buick easier... but that Porsche seems like so much fun. Thanks for the help and patience.

Chris