911 engine codes

[Grady Clay]

Max,
First, welcome to the Forum
You will find a lot of help here.

From this info, it is probably a 1970 911T, 2.2 liter engine.
Please post images of the number 61008xx (green arrow) and the type number (red arrow).
There is also a number below the type number (red arrow) that is of interest and may extend your engine number ‘xx’.
(Ignore yellow)



Best,
Grady

[Max007]

Thank You very much for this information, Grady!
I will check this second number as soon as possible.
The car is now in a garage wait.....

Max

[Targalid]

Grady,
There are no numbers on the engine in the photo that you use as an example. How do you tell what motor it is? The reason I ask is because my motor has no numbers and I certainly don't know what it is. It has obviously been rebuilt because I found a receipt for connecting rod and piston balancing in the glove box with some other receipts. The engine case has no numbers I can find. The owner said it was replaced with the "same engine as the turbo but without the turbocharger". The car is a 76 911S. It still has all the smog pump, air lines, thermal reactors, so it could be a 2.7 or an early 3.0. Any ideas how to tell what motor is in it? Are there other clues short of taking the heads off and measuring the piston diameter? Any answers, even cheap ones, would be appreciated. I can attach a photo but it will not show any numbers, just an un-numbered bare casting.
Al

[Grady Clay]

Al,

The engine pictured is a spare-part replacement case, a 911SC I think.
Those crankcases do not have stamped numbers.

You can get an idea of what a crankcase is using the casting numbers and the casting date.

For your ’76, there is a large difference between a 2.7 911S crankcase and a ’76 930 Turbo crankcase.
I doubt the ’76 911S engine had the original case replaced with a spare part for a 930 Turbo.

IF, your crankcase, crank & rods, P&Cs, heads, etc. were all replaced with a 930 Turbo, that is both good and bad.
The ‘bad’ part is the possibility of having 6.5:1 CR and no turbocharger.
The 'good' part is the 930 parts are more robust.


I thought I had an image of the engine (serial) number and the type number – I don’t have one in my file.
Search Pelican – there are many examples

Best,
Grady.

[Targalid]

Grady,
Based on response versus rpm, I am betting that it has 8.5:1 pistons. Since the case has no numbers it must be a factory replacement. The question I have is what case it might be, either magnesium or aluminum. I am hoping it has an early 3.0 SC engine case but since there are no numbers I am in the dark. It was a California car so required all the pollution equipment be replaced after the rebuild so the case options must be limited. The repair receipts I have date from 1993. I am guessing a mechanic in 1993 would have used a 3.0 SC case rather than a new 2.7 case. Would a factory replacement 2.7 case have even been available then? A flame test on a shaving should answer the magnesium question. Does Wayne's engine rebuilding book have the different engine cases shown in photographs for comparison? Zimmerman's book does not nor does Wayne's 101 Projects book. There must be differences in casting web patterns from one engine model to the next. I will solve this puzzle eventually. Thanks for your input.
Al

[Grady Clay]

Are the casting numbers on the sides of the crankcase 911.xxx.xxx.xx or 930.xxx.xxx.xx?

Scan the repair reciepts and post them.
We can tell a lot from the parts that were used.

Best,
Grady

[Targalid]

Will do. I need to get photos, learn how to post them and start a new thread. This car has a lot of issues that will amuse the experts here I am sure.

[djpateman]

Max, Probably a 1970 911T engine type 911/03

[Max007]

Thank You everybody, following Your instruction I've found the engine number on my new project!

It is really a 911/03 type.

[alfy]

Gents
Im looking at a 72 mod 911, that I consider to buy.
The seller says it´s not a number matching car.
The engine number is 6120015. (MFI engine)
Could anybody help me to find out what engine this is?

Thanks

[ossiblue]

6120015 decodes to a 1972 U.S. T engine, number 15 out of 4478 built--early 2.4 L MFI engine. It may not be the engine installed in the car by the factory, but it is the correct year and model for the car you mentioned if it is a U.S. car. Try to get the engine type number as well which should be 911/51.

[alfy]

Thanks Ossiblue !
The car is a 911S from 72, and was bought in Germany, so it's maybe a little bit strange if its a U.S. 911T engine?
The owner says it has been rebuilt in Germany in the 80-90's to a 2,7 liter, so maybe it is a RS spec engine now? Is there a way to find this out without taking the engine all apart? What more than bigger bore cylinders was done on a RS engine? Heads, cams ?
I really don't know what I should do with this car yet, but feels like a chance that I can not let go.

Thanks again !

[ossiblue]

Originally Posted by alfy

Thanks Ossiblue !
The car is a 911S from 72, and was bought in Germany, so it's maybe a little bit strange if its a U.S. 911T engine?
The owner says it has been rebuilt in Germany in the 80-90's to a 2,7 liter, so maybe it is a RS spec engine now? Is there a way to find this out without taking the engine all apart? What more than bigger bore cylinders was done on a RS engine? Heads, cams ?
I really don't know what I should do with this car yet, but feels like a chance that I can not let go.

Thanks again !

I'll leave the answers to most of your questions about the specs of an RS to the experts like Grady.

As far as having a T engine in an S car, that's not too far out of the ordinary from what I've seen. Having a U.S. engine in a car in Germany may be the result of the car having once been in the U.S. and later sold to someone in Europe--very common sequence--and the engine swap may have been done in the U.S. All this is speculation, however, unless you have some documentation of the car's history.

Bottom line, not having the original engine in an early S is not uncommon and contributes greatly to the high value the market places on an S with its original drive train.

BTW, you may wish to post the VIN of the car to help identify its history.

[amlobo]

Dears
I bought a 911 3.0SC with engine number 6300296.
Could anybody help me to know the year of this engine?

Thanks

[djpateman]

6300296 should be a 1970 911S engine case, engine type 911/02 2.2 liter
6 = 6 cly
3 = S
0 = 1970
0296 = sequence #, so fairly early out of 2480 produced

[911Freak]

Originally Posted by amlobo

Dears
I bought a 911 3.0SC with engine number 6300296.
Could anybody help me to know the year of this engine?

Thanks

1980 SC engine: 630 0296 = RoW should be type 930/09
188hp / 265trq 8.6:1 c r. Valves: Intake 49 / exhaust 41.5, Ports 34/35

Great engine!

[kaug23]

I hope someone can help me with this. I have an engine out of my 911s. The numbers you show are different from mine. There is a star stamped in front and in back of the number.

The type is a 901/02 9361

The number is (star) 4080079 (star)

I don't know what this denotes, it is supposed to be a 2.0 S motor.

Thanks in advance,
Kurt

[356RS]

Kurt, Yes it is a 2.0S from 1968. The stars in front and back of the serial number are normal for early engines I think. Do you have the Sportomatic?

[kaug23]

No, it is a five speed. Thanks for the info, I was starting to wonder if something had been changed.

[alfy]

Originally Posted by ossiblue

BTW, you may wish to post the VIN of the car to help identify its history.

The VIN no for the 72S is: 9112301060