Engine Numbers
Thread Starter
Intermediate
Joined: Jul 2007
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From: Elgin Ontario
Engine Numbers
I bought a 1972 Vette Roadster 8 years ago and I knew it was a NOM car. I have since lost contact with the previous owner and I am trying to find out what motor year is in the car. I have photos when the engine was rebuilt and know it is 4 bolt mains. The reason I need to know the engine year is in Ontario Canada our government has decided that they will check classic cars for pollution equipment and it must be there and working. If the engine is a different year then the car you have the pollution equipment must be for that year of motor. I guess they are trying to get the green votes and kill our fun. We have already had people fined and made to get the equipment or the car is impounded, so beware US friends if you come to Ontario with your classics. Anyway the numbers on the engine are K115T4X and below that T91158479 or could be T91153479. I don't think it is even a Vette motor but any help is appreciated so I can get compliant before I get fined. At least my 70 big block is original so only one car to do. Second question is how do you know what polution equipment is suppost to be on a car.
Thanks 70 Vetteman
Thanks 70 Vetteman
Race Director
Joined: Jul 2001
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The K115T4X means that the engine was built by McKinnon Industries in St. Catherines on November 5th. The T4X is a bit of a mystery as 99% of codes that start with a T are for trucks, the remainder are a few that have a number that follows the T such as in this case. Those few went into midsize Chevrolets built in the 80s. I cannot find a specific code for T4X to narrow it further.
If you provide the block casting number and date possibly this would help.
If I were you, I'd configure the car to look like a '72 Corvette from the smog point of view and not worry about what the engine came from or trying to replicate that. Your AIM will show what smog equipment the car came with.
BTW- the law does not apply to out of province/state cars, no need to scare away our neighbours to the south. There is no need for the equipment to work, it just needs to be there.
Paul74 is the expert in this unique to Ontario issue.
If you provide the block casting number and date possibly this would help.
If I were you, I'd configure the car to look like a '72 Corvette from the smog point of view and not worry about what the engine came from or trying to replicate that. Your AIM will show what smog equipment the car came with.
BTW- the law does not apply to out of province/state cars, no need to scare away our neighbours to the south. There is no need for the equipment to work, it just needs to be there.
Paul74 is the expert in this unique to Ontario issue.
Safety Car
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From: Indy Indiana
Drifting
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From: Deplorableville Nebraska
Thread Starter
Intermediate
Joined: Jul 2007
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From: Elgin Ontario
The Casting number is GM3970010 with a large K2 on the drivers side, there is no date on the passenger side where most dates are. In this area there is a small raised area with two holes that don't do anything. Any other places to look? Info I have is this block casting was used from 69 to 80 in cars. As I stated it is a four bolt main engine. As for the laws, I was just at a show Sunday and the 79 vette owner beside me just got whacked $365 dollars for side pipes no cats. He had six infractions which he was told could have been $365 for each. He also stated cars of drivers that were rude and uncooperative were impounded and must have a certified mechanic do the work to release the vehicle. Seems that the field people don't have the facts as they were checking US cars. They are accompanied by the OPP. As for the polution equipment what is the AIM?
Bryan
Bryan
The K115T4X means that the engine was built by McKinnon Industries in St. Catherines on November 5th. The T4X is a bit of a mystery as 99% of codes that start with a T are for trucks, the remainder are a few that have a number that follows the T such as in this case. Those few went into midsize Chevrolets built in the 80s. I cannot find a specific code for T4X to narrow it further.
If you provide the block casting number and date possibly this would help.
If I were you, I'd configure the car to look like a '72 Corvette from the smog point of view and not worry about what the engine came from or trying to replicate that. Your AIM will show what smog equipment the car came with.
BTW- the law does not apply to out of province/state cars, no need to scare away our neighbours to the south. There is no need for the equipment to work, it just needs to be there.
Paul74 is the expert in this unique to Ontario issue.
If you provide the block casting number and date possibly this would help.
If I were you, I'd configure the car to look like a '72 Corvette from the smog point of view and not worry about what the engine came from or trying to replicate that. Your AIM will show what smog equipment the car came with.
BTW- the law does not apply to out of province/state cars, no need to scare away our neighbours to the south. There is no need for the equipment to work, it just needs to be there.
Paul74 is the expert in this unique to Ontario issue.
Race Director
Joined: Jul 2001
Posts: 15,892
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The lack of casting number in the usual location confirms that it's a McKinnon engine, not that this helps you much. I'm no sure where the date code is actually located, maybe somebody else might know.
The AIM is the Assembly Instruction Manual. Shows how the factory put the car together.
What part of the province are you in? Sounds much nastier than what the Ottawa folks put up with.
The AIM is the Assembly Instruction Manual. Shows how the factory put the car together.
What part of the province are you in? Sounds much nastier than what the Ottawa folks put up with.
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Thread Starter
Intermediate
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From: Elgin Ontario
I am in Smith Falls and Kingston area but the owner of the 79 was from Ottawa and that is where he got dinged going to cruise night. The assembly manual I| have from Corvette Central indicates that small block base 72 vette had an air pump but all other books from Corvette experts say the Base engine 200 HP only had TCS and canister system and of course PCV but nothing else. I have added the above so I may just way and see if I get stopped unless someone else can help with the block ID.
Thanks Bryan
Thanks Bryan
Race Director
Joined: Jul 2001
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Small world- we're looking for property in the Perth area. 
The guy with the '79 was 'asking' for trouble, side pipes are not exactly a subtle deviation from stock. As for your AIR pump, I'd sooner believe the AIM than some guy writing a book unless he can substantiate his reasons.
The guy with the '79 was 'asking' for trouble, side pipes are not exactly a subtle deviation from stock. As for your AIR pump, I'd sooner believe the AIM than some guy writing a book unless he can substantiate his reasons.
Team Owner
Joined: May 2005
Posts: 31,497
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From: Huntsville AL
"K115T4X and below that T91158479"
K = St. Catherines Engine Plant
115 = Assembly date (Nov 5th)
T4X = suffix code (unknown, but most likely a truck)
T = Tarrytown, New York assembly plant
9 = Engine year (1969, most likely late 1969 )
1158479 = VIN derivative? Looks like one too many digits
If I recall, Tarrytown, NY was producing trucks in 1969 / 1970 time frame. The 010 casting number, combined with the engine year info, would seem to indicate a 1970 application.
Here is a link to another T4X engine code discussion
http://www.z28.com/forum/engine-tech...ing-gurus.html
K = St. Catherines Engine Plant
115 = Assembly date (Nov 5th)
T4X = suffix code (unknown, but most likely a truck)
T = Tarrytown, New York assembly plant
9 = Engine year (1969, most likely late 1969 )
1158479 = VIN derivative? Looks like one too many digits
If I recall, Tarrytown, NY was producing trucks in 1969 / 1970 time frame. The 010 casting number, combined with the engine year info, would seem to indicate a 1970 application.
Here is a link to another T4X engine code discussion
http://www.z28.com/forum/engine-tech...ing-gurus.html
Race Director
Joined: Jul 2001
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Ed (aka Pedro) has posted some good info. Let's say he's nailed it as a '69 truck and and we could identify the exact model that Tarrytown was building at that time. We could then find out what smog stuff the truck would have come with. This would probably be less than a stock '72 Corvette, but you equip your motor this way nonetheless..
I think you'd have a tough time trying to demonstrate all this to the Ontario smogn*zis and convince them that you're permitted to do this downgrade under the law. Why go looking for trouble?
I think you'd have a tough time trying to demonstrate all this to the Ontario smogn*zis and convince them that you're permitted to do this downgrade under the law. Why go looking for trouble?
Le Mans Master
Joined: Jan 2007
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From: Peekskill NY
Thread Starter
Intermediate
Joined: Jul 2007
Posts: 43
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From: Elgin Ontario
Small world- we're looking for property in the Perth area.
The guy with the '79 was 'asking' for trouble, side pipes are not exactly a subtle deviation from stock. As for your AIR pump, I'd sooner believe the AIM than some guy writing a book unless he can substantiate his reasons.
The guy with the '79 was 'asking' for trouble, side pipes are not exactly a subtle deviation from stock. As for your AIR pump, I'd sooner believe the AIM than some guy writing a book unless he can substantiate his reasons.
Thanks again
Thread Starter
Intermediate
Joined: Jul 2007
Posts: 43
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From: Elgin Ontario
"K115T4X and below that T91158479"
K = St. Catherines Engine Plant
115 = Assembly date (Nov 5th)
T4X = suffix code (unknown, but most likely a truck)
T = Tarrytown, New York assembly plant
9 = Engine year (1969, most likely late 1969 )
1158479 = VIN derivative? Looks like one too many digits
If I recall, Tarrytown, NY was producing trucks in 1969 / 1970 time frame. The 010 casting number, combined with the engine year info, would seem to indicate a 1970 application.
Here is a link to another T4X engine code discussion
http://www.z28.com/forum/engine-tech...ing-gurus.html
K = St. Catherines Engine Plant
115 = Assembly date (Nov 5th)
T4X = suffix code (unknown, but most likely a truck)
T = Tarrytown, New York assembly plant
9 = Engine year (1969, most likely late 1969 )
1158479 = VIN derivative? Looks like one too many digits
If I recall, Tarrytown, NY was producing trucks in 1969 / 1970 time frame. The 010 casting number, combined with the engine year info, would seem to indicate a 1970 application.
Here is a link to another T4X engine code discussion
http://www.z28.com/forum/engine-tech...ing-gurus.html
Race Director
Joined: Jul 2001
Posts: 15,892
Likes: 42
Here is a photo album from a friend's '72 base engine 4 speed/49 state car.
http://rides.webshots.com/photo/2815...10410527duOapt
This is the most original untouched '72 I've ever seen, and has gone through the NCRS Bowtie judging program. Note the TCS, PCV and charcoal cannister hook up. No smog pump.
Melting Slicks
Joined: Apr 2007
Posts: 3,189
Likes: 111
From: Tolland CT
Could the smog pump be for cars sold in California?
California was a few years ahead of other states in that time frame.
There were some special requirements for cars sold in that state at that time.
California was a few years ahead of other states in that time frame.
There were some special requirements for cars sold in that state at that time.
