Englene number
 

I have bought an 2.7 rebuild MFI engine with number 612...5 and engine stamped 911/91 which indicates a 173 1/2 type, but the nummer series indicates a US 1972 T CIS So what is wrong? 911/91 is casted but engine nr. Seems tampered with or maybee manuelle marked, can Someone explain.

Regards lexn

Engine number612 is 1972 engine 911/91 cis us 73 but engine 612..... and 911/61 72T

According to some other forum... 911/91 went from 6133001 to 6136092.

It shouldn't be 2.7, shouldn't be MFI either; your case (911/91) was supposed to be a US 2.4 T CIS.

911/91 is a 1973 case but 612 is 72T case kind odd.

Are you sure it's not 911/51 or 911/61?

That would make sense for a US 72T with MFI 5speed or sporto

otherwise I would guess the number has been re-stamped

A huge number of 2.7 engines exploded during their early lives do to over heating.
Although not all but some of the 73 cases were 7R castings with a 2.4 spigot size.
As a 7R case, it makes a great replacement case for building a 2.7. All that is needed is to bore the spigot from 94mm (?) to 97mm if memory serve me.

Yes I´m quite sure that is 911/91 but the engine number looks a bit odd, have heard that is a star fore and after, but not on this, what should be the reason for a false wrong number? other than stupidity.

Take a picture of engine and serial number will be easier to speculate.

Engine No.
 

http://forums.pelicanparts.com/uploa...1392312906.jpg
http://forums.pelicanparts.com/uploa...1392312937.jpg

911/91 looks ok but the other one ?

Serial number is a restamp. Might be a dealer restamp but generally they use German number stamps.

It look like dealer restamp .Number look same size on serial and internal.

Numbers
 

Just found more nubers on my case 901,101,102,3R this indicates a 2.2 case, haven´t taken it apart because it runs fine with no oil spill, but I bought it as a 2.7 rebuild, but is this possible with a 3R case?

No I got a lot of different series numbers 911/91, 6120015 and 901.101.102.3R what should I think this is, maybee take it all apart.:confused:

Oui, no "*" on either side of the serial and the "/" on the engine type is rather long

2R and 3R =70 -71 2.2 3R 4R 2.4 72-73 you have to look both side

Numbers
 

Other side is 901.101.101.4R and what is that, can anybody tell an amatør what type of block this is, I am a bit confused, have patient please :)

Like post 14 3R and 4R is 72-73 that goes whith serial number 6120015 1972case 2.4

Numbers
 

Ok thanks then I understand, I have a rebuild 2.4 Us case with 2.7 syl and perhaps a reinforced case, maybee reasons for the 911/91 stamping.

I think 911/91 they stamp is 9 is upside down should 911/61 the 9 is error whith case number 6120015 but you may have 2.7 barrel whith 2.4 crank is a 2.7L

Neither the 911/91 or the serial number look anything like original factory.

Agree it a restamp by who knows.Like post 11and 13