Engine Identification 1970 GT 1900

evilmcd · 06-23-2005

I am looking at a nicely restored 1970 GT 1900. The engine runs well but is not original to the restored car. It is four cylinder and the number on it is "19S 0953872". The "7" may be a "1". Can anyone help identify whether this is a 1.9 or 1.1 liter engine for me? Thanks.

evilmcd · 06-23-2005

After reading on through some threads my slow, dimwitted brain somehow latched onto the idea that "19S" may actually correspond to "1.9 liter engine"

How is my thinking on this? Being an automotive engineer, this makes perfect sense, but then again, I have seen thousands of part numbers that make no sense at all through the years

Thanks.

nobody · 06-23-2005

19s kinda says it all, it's a 1.9. are there any markings like * before or after the number?

rockytopmark · 06-23-2005

If there are Asterisks * before and after this ID number, does that indeed represent a high compression 1.9? I have a 72 GT and always assumed it had original motor, low compression based on the model year.

Thanks, Mark

nobody · 06-23-2005

please correct me if I'm wrong but so far there has been one rebuilt motor with the asterics that wasn't a high compression. All the rest have been proven to be if they were stock.

evilmcd · 06-24-2005

Nope, there no asterisks in the "19S" engine block number.

greensmurf20 · 06-24-2005

i have two low compression engines with asteriks before and after the engine number

73 gt man · 06-24-2005

What would be the difference in cylinder pressures be between a high and low compression engine?

mnike000 · 06-25-2005

I have a 71 gt that I'm restoring. I figured it was a 7.6:1 compression because it is a 71 however, the engine block reads *19S 0647673*. From what I've read this means the engine is the higher compression 11:1 which would be great because this is the engine I want. Could someone tell me if this is right, along with any other information you can tell from the block number. Thanks alot!!

greensmurf20 · 06-25-2005

the higher compression engines are only rated for 9:1 from the factory, and are overrated from the factory still. they never came stock in 11:1 form, altho venolias are probably what your thinking of.

its easy to tell if you just put any cylinder at TDC, pull the sparkplug, and shine a little penlight or something in there. you'll see a halfcircled dish taken out of the piston, or 2 valve reliefs with a flat top.

simplemind7 · 06-25-2005

Originally Posted by nobody

please correct me if I'm wrong but so far there has been one rebuilt motor with the asterics that wasn't a high compression. All the rest have been proven to be if they were stock.

i have a low compression motor with the asterics, it was rebuilt, but i looked at the pistons before the engine was ever cranked over and they still have carbon on top... so i don't believe the pistons were changed since i have most of the parts from the other engine the guy who rebuilt it had and it has low compression pistons too...

nobody · 06-25-2005

after the double asterix the next is color of the block and head.

evilmcd · 06-27-2005

The 1.9 liter engine in the 1970 GT 1900 is yellow in color with some rust spots - but I would assume this is probably not the best indicator out there of engine size/compression ratio/etc since the block could always be repainted.

nobody · 06-27-2005

Stock color is semi gloss black. If it's been painted you can bet it's been rebuilt.

OpelLarry · 01-24-2006

Originally Posted by nobody

after the double asterix the next is color of the block and head.

Where can I find a key to engine color codes? They weren't all semi-gloss black were they?

2 Fast 4 U · 01-24-2006

Originally Posted by OpelLarry

Where can I find a key to engine color codes? They weren't all semi-gloss black were they?

As far as I know all the Opel engines were painted black, I've never seen an original one in an other color

The engines in the US are all the S type engines [= high compression], as said the later models have a reduced compression due to US emission laws that's why you have two different typs of compression with an "S" engine

RallyBob · 01-24-2006

The only difference I've seen is the early Kadett engines (1.5, 1.9) were actually dark grey. I guess technically it's shade of black, but there's a noticeable contrast on a Kadett engine vs. other models. Perhaps due to the assembly plant or something....

Bob

OpelLarry · 01-26-2006

Thanks guys! Just what I needed to know. Larry

06-23-2005	#1 (permalink)
evilmcd Opeler Join Date: Jun 2005 Location: Poughquag, NY 12570 Posts: 8 Classified Rating: 0% (0)	Unanswered: Engine Identification 1970 GT 1900 I am looking at a nicely restored 1970 GT 1900. The engine runs well but is not original to the restored car. It is four cylinder and the number on it is "19S 0953872". The "7" may be a "1". Can anyone help identify whether this is a 1.9 or 1.1 liter engine for me? Thanks.

06-23-2005	#2 (permalink)
evilmcd Opeler Join Date: Jun 2005 Location: Poughquag, NY 12570 Posts: 8 Classified Rating: 0% (0)	Engine Identification 19S After reading on through some threads my slow, dimwitted brain somehow latched onto the idea that "19S" may actually correspond to "1.9 liter engine" How is my thinking on this? Being an automotive engineer, this makes perfect sense, but then again, I have seen thousands of part numbers that make no sense at all through the years Thanks.

06-23-2005	#4 (permalink)
rockytopmark Member Join Date: Apr 2005 Location: Naperville, IL Posts: 132 Classified Rating: 0% (0)	s Before and after... If there are Asterisks before and after this ID number, does that indeed represent a high compression 1.9? I have a 72 GT and always assumed it had original motor, low compression based on the model year. Thanks, Mark

06-24-2005	#6 (permalink)
evilmcd Opeler Join Date: Jun 2005 Location: Poughquag, NY 12570 Posts: 8 Classified Rating: 0% (0)	No Asterisks present Nope, there no asterisks in the "19S" engine block number.

06-25-2005	#9 (permalink)
mnike000 Opeler Join Date: Oct 2004 Location: Avondale, PA Posts: 13 Classified Rating: 0% (0)	Can you tell me about this engine? I have a 71 gt that I'm restoring. I figured it was a 7.6:1 compression because it is a 71 however, the engine block reads 19S 0647673. From what I've read this means the engine is the higher compression 11:1 which would be great because this is the engine I want. Could someone tell me if this is right, along with any other information you can tell from the block number. Thanks alot!!

06-23-2005	#3 (permalink)
nobody No Access Join Date: Nov 2003 Location: in transit Posts: 3,873 Classified Rating: 0% (0)	19s kinda says it all, it's a 1.9. are there any markings like * before or after the number?

06-23-2005	#5 (permalink)
nobody No Access Join Date: Nov 2003 Location: in transit Posts: 3,873 Classified Rating: 0% (0)	please correct me if I'm wrong but so far there has been one rebuilt motor with the asterics that wasn't a high compression. All the rest have been proven to be if they were stock.

06-24-2005	#7 (permalink)
greensmurf20 OPEL-LESS!!! Join Date: Mar 2003 Location: Gobles michigan 49055 Posts: 2,110 Classified Rating: 0% (0)	i have two low compression engines with asteriks before and after the engine number

06-24-2005	#8 (permalink)
73 gt man Opeler Join Date: May 2005 Location: Gilbert AZ Posts: 86 Classified Rating: 0% (0)	What would be the difference in cylinder pressures be between a high and low compression engine?

06-25-2005	#10 (permalink)
greensmurf20 OPEL-LESS!!! Join Date: Mar 2003 Location: Gobles michigan 49055 Posts: 2,110 Classified Rating: 0% (0)	the higher compression engines are only rated for 9:1 from the factory, and are overrated from the factory still. they never came stock in 11:1 form, altho venolias are probably what your thinking of. its easy to tell if you just put any cylinder at TDC, pull the sparkplug, and shine a little penlight or something in there. you'll see a halfcircled dish taken out of the piston, or 2 valve reliefs with a flat top.

06-25-2005	#12 (permalink)
nobody No Access Join Date: Nov 2003 Location: in transit Posts: 3,873 Classified Rating: 0% (0)	after the double asterix the next is color of the block and head.

06-27-2005	#13 (permalink)
evilmcd Opeler Join Date: Jun 2005 Location: Poughquag, NY 12570 Posts: 8 Classified Rating: 0% (0)	INteresting Note on block color The 1.9 liter engine in the 1970 GT 1900 is yellow in color with some rust spots - but I would assume this is probably not the best indicator out there of engine size/compression ratio/etc since the block could always be repainted.

06-27-2005	#14 (permalink)
nobody No Access Join Date: Nov 2003 Location: in transit Posts: 3,873 Classified Rating: 0% (0)	Stock color is semi gloss black. If it's been painted you can bet it's been rebuilt.

01-24-2006	#17 (permalink)
RallyBob Project 1450 supporter... Join Date: Mar 2002 Location: Pleasant Valley, CT Posts: 6,656 Classified Rating: 0% (0) Provided Answers: 4	The only difference I've seen is the early Kadett engines (1.5, 1.9) were actually dark grey. I guess technically it's shade of black, but there's a noticeable contrast on a Kadett engine vs. other models. Perhaps due to the assembly plant or something.... Bob

01-26-2006	#18 (permalink)
OpelLarry Opeler Join Date: Jan 2006 Location: Norman, OK Posts: 6 Classified Rating: 0% (0)	Thanks guys! Just what I needed to know. Larry

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