How Do You Decode The Engine Identification Numbers
 

Hello All,
I'm new to Porsche and have a '75 911S. I know that this subject has to have been mentioned many times. I performed many searches with no definite answers, so I guess I'll post the question. I have located my serial or identification number on my engine. Now what does it mean? Should it correspond with the vehicle ID number?
Thanks in advance,
Randy

If you mean the engine type number, it defines the year and the characteristics of the engine.
901/XX, 911/XX, 930/XX, 935/XX and so on. The Type has a range of engine serial numbers.

Your car VIN and engine type should "match" hence the term "matching numbers" unless someone changed engines....unfortunately not too uncommon with these cars. The VIN is also in more than one place so if two cars have been cut in half and welded back togethere the VINs may not even match.

To understand the numbers...use the lookup table.

Your 75S engine type number should be 911/4X where x is 1-9.

I have the numbers 901 106 1015R in the casting at the fan housing. The numbers stamped into the right hand support of the fan housing are 6450165. Where is the table that is mentioned above?
Randy

Your 7=digit ’75 engine number should have the form:
*6X5xxxx*
where:
6 = Engine design, 6-cylinder engine
X = numbers 1-7 (see list below)
5 = Model year 1975
xxxx = Sequential serial number usually starting with 0001. Exceptions: Starting with 9001 = engine for Sportomatic.

X = 1, 911, Type 911/41, (or Type 911/46 for Sportomatic)
X = 3, 911S, Type 911/42, (or Type 911/47 for Sportomatic)
X = 4, 911S/Carrera USA, Type 911/43, (or Type 911/48 for Sportomatic)
X = 5, 911S/Carrera California, Type 911/44, (or Type 911/49 for Sportomatic)
X = 6, Carrera 2.7 (MFI), Type 911/83
X = 7, Turbo 3.0, Type 930/50

Best,
Grady

That 901 106 number is a casting part number. The engine type number is right near where you found the engine serial number. Its on a flat surface sort of behind the serial number.

The table is in most Porsche performance handbooks. I have not seen it on line query.

So the last 4 digits of the engine number should be the same as the last four of my vin number?
Randy

http://www.elferhelfer.com/fzident.htm#
It's in German, but easy to figure out.
Your engine does decode to '75 911S for US market.

No. One is a body serial number and the other is an engine serial number.

Thanks for bearing with me on this. What would,if anything, tell me that this is the original engine for this car?

Porsche 911 engine number decode
 

I have a 1980 911 SC Vin 91A0140398 with an engine number of 6880147 which may not be matching. Can you tell me the engine specs.

First off - welcome. If that engine serial number is correct, it appears to be a non-California 1978 Turbo engine. A fairly rare beast. Less than 300 produced. 253 HP @ 5430 rpm or 265 hp depending on source. 395 Nm Torque. 7.0:1 compression, 3.3 litre. (compared to 185 hp for a normal 911 3.0 SC, 8.5:1, Nm 265 Torque) I may get shot down for this - but the engine and gearbox may be worth almost as much as rest of the the car. VIN indicates a regular 1980 SC Coupe, 1 of ~4200

PS - that was a 10 year old thread! Congrats

I have an engine number of 6403545. I think that means
6 is 6 cylinder
4 is type 4
0 is 1980
3545 is the sequence number

When I look up the motor types for 1980, I only see type 7. However, there was a type 4 in 1979. Was the 1979 type 4 continued into 1980?

FYI, the type 4 was a lower compression 8.5:1 motor for 49 state USA. The type 7 had a higher compression of9.3:1.

You have a US 1980 911SC engine, type 930/07.

You are confusing the engine version number (2nd digit) with the type number, which is not represented in the engine serial number.

JR

I have a 928 with an engine block # of "M28/19 81D0844". Can someone tell me how to decode this? Thanks in advance.

Look it up using PET. 1983 928S for USA or Canada.

JR

engine numbers
 

Hi all, new to this forum, I purchased a 85 Carrera knowing it had a rebuilt engine and was looking at this thread trying to decipher my numbers, which are 658 1581 and 930/06 any help would be appreciated, is it a common to swap blocks?
Mahalo Mike

Welcome, Mike. Unfortunately it looks like you ended up with a 3.0L engine from a 1978 911SC. I think most of us would view that as a significant downgrade from the 3.2L your car should have.

I would say it's normally not common to swap blocks when a 3.2L is involved. You are more likely to find a swapped block in a 2.7L car because those engines had a lot of problems. And sometimes someone with a 911SC will upgrade to a 3.2L.

Putting a 3.0L into a 1985 must have been done to save money (unless it's a real hot rod engine), and hopefully not to cheat you.

Does it have fuel injection or carbs?

Mark

im feeling sick now :( it has fuel injection
thanks

she is pretty fast though

Sorry Michael. If it's any consolation, that car will still be a blast to drive. It's just going to hurt you when you try to sell it. Hopefully you didn't overpay to begin with. You might even consider legal recourse if you only bought it recently.

If you want to check yourself, this site has the data: Simon's Porsche 911 SC Site

Your serial number is also in the correct range for that engine type.

Mark

thanks< I bought it from a guy last week, he had it rebuilt years ago probably 100k on it, I have all the paperwork from the re-build not sure he knows himself
and yes I'm sure I over paid haha

Thanks Mark, its been serviced regularly at Porsche of Honolulu, they must know if they have performed work on it, Time for a Twin Plug I guess.
Mahalo

Post a picture of the motor.

It may be that just the case was replaced with all Carrera parts, including the crank, from the original car? It's a long shot but worth investigating.

That's a great point, I was thinking about that today. The SC case and Carrera cases are the same, but the fuel injection systems are obviously different.

A photo will tell us. Maybe Mike lucked out......

Mark

Thanks guys, I will post a pic.
im not to savvy on this its asking for a url of my image??!! what is that!!??

engine
 

http://forums.pelicanparts.com/uploa...1496285023.JPG
http://forums.pelicanparts.com/uploa...1496285023.JPG
http://forums.pelicanparts.com/uploa...1496285023.JPG
http://forums.pelicanparts.com/uploa...1496285023.JPG

whew, figured that out!(uploading pics) don't judge me on the A/C install I purchased it like this last week :)

Yes! Looks like Gordon was spot-on, that's a 3.2L intake system! Someone must have used the older 911SC case for a rebuild. I doubt they added that intake system to a 3.0L engine.

So you no longer have a numbers-matching car, but you likely have a real 3.2L engine like you're supposed to.

Sorry to have given you a fright. I should have thought about it more carefully.

Mark

No worries Mark,
I really appreciate all the help and knowledge you guys have.
Mike

Hi everyone,
I am in process of approving 3.2L *63F03752* engine fitted in 1975 911s.
Is there any way of finding engine origin?
Thanks for the assistance!

911s id
 

i just found this 1966 911s in a garage that has been there for 30 years ?

can anyone help to authenticate ?

vin: 307143
engine no: 941082
trans no: 902/1
trans serial no: 228064

Good Day all! I hope you are all safe and keeping well during this trying time.

In my free time I frequent a scrap dealer near me...social distancing to the max.

I found a block under a load of scrap and knew it was a Porsche block but given it is under a load of scrap I was only able to pull the block number.

Can anyone please help me ID what it is?

901 105 111 OR

Thank you! Im waiting for the scrap dealer to unearth it so he can load it into my truck but he is a tad busy so just wanted to try find out what I have unearthed.

Unfortunately that is not a serial #, and is really not useful. Any raised # is likely to be a casting mark. Any serial or type # is punched into the surface.

That is a casting number for a cam housing. https://www.bing.com/search?q=901+105+111+OR&pc=MOZI&form=MOZTSB

I ran across serial number 6273432 and would like help with decoding as the second number doesn’t appear to match any of the info in this thread. 1977 6 cylinder.. but what’s the 2?

@Rumbles, I think I bought your car!

1977 Type 911/85 for 911S North America 2.7L

Aplogies I too am new to this and find the whole VIN and engine number confusing, I am looking buying a 1969 911 targa, its badged as 911s although I suspect its a 911T, the engine number is 6195940 and the VIN 119110377, if anyone can decipher these I would be very grateful.

VIN 119110377 is a 1969 911T Targa
6195940 is a 1969 911T engine and probably original.