69 L36 Radiator Part Number

[Floyd B.]

I'm going to MI this weekend to look at a '69 L36 4-spd (LM) w/o A/C. I'm currently in a corp. apartment in PA while all of my books, reference material and notes are at my home in FL. I have managed to find all of the information (specs, codes, part numbers, casting numbers, etc.) that I need on the internet, save one: the radiator part number.

Would someone please look it up and respond to this thread.

Thanx,

-Floyd-

[Joe L.]

Re: 69 L36 Radiator Part Number

I'm going to MI this weekend to look at a '69 L36 4-spd (LM) w/o A/C. I'm currently in a corp. apartment in PA while all of my books, reference material and notes are at my home in FL. I have managed to find all of the information (specs, codes, part numbers, casting numbers, etc.) that I need on the internet, save one: the radiator part number.

Would someone please look it up and respond to this thread.

Thanx,

-Floyd-

Floyd-----


The original part number was GM #3018571.

[Floyd B.]

Re: 69 L36 Radiator Part Number

Thanx Joe. Somehow I knew it would be you that gave me the number

I will find this number on a brass tag soldered to the passenger side of the core tank - correct? There will be a date code in the form YMDD - true?

[Joe L.]

Re: 69 L36 Radiator Part Number

Thanx Joe. Somehow I knew it would be you that gave me the number

I will find this number on a brass tag soldered to the passenger side of the core tank - correct? There will be a date code in the form YMDD - true?

Floyd-----


Yes, but the tag is not always there, either because it never had one or because it fell off long the way.

Alternate method of identification:

1) No filler on either tank; 3/8" nipple on top of right side tank;

2) Harrison embossment on side of right side tank;

3) No oil cooler fittings on rear side of right side tank.

If the radiator meets the above-referenced, it's an original radiator or a SERVICE replacement of the exact, original part number. The latter is unlikely since the original part number was discontinued from SERVICE in March, 1970 (and replaced by the GM #3019190 which had oil cooler provisions for THM-400 applications)

[Floyd B.]

Re: 69 L36 Radiator Part Number

Well, I did buy the '69. There were a few minor disappointments:

non-original intake: 8937793 (it might have been 3937793, it was difficult to see)
non-original carburetor: 7029207
non-original Windshield: LOF EZ-Shade w/ date code VJ (Dec 78)
non-original driver-side window: LOF EZ-Shade w/date code LG (Mar 77)
non-original radiator: forgot to jot down the part number but it was Harrison of that era with no provision for the oil cooler.

At least these parts are GM parts and "period" correct. It appears that the carb would be correct for a '69 350/350hp. It had a number next to the part number - 3477 - is this a date code? Perhaps the 347th day of 1977?

I was also hoping someone could tell me what vehicles the intake could be from. My Chevrolet parts interchange book is back in Florida.

BUT - overall I'm thrilled with the acquisition. The big components are all original: frame, block and trans. Frankly I didn't think I would ever be able to get my hands on a numbers-matching, big-block, 4-spd convertible project car at a market correct price.

BTW, I forgot to take a picture, but this 427/390hp, 4spd, no A/C car had the "short" style dip stick. I have no way of knowing if it is original to the car. The car's sequence number is 3407 (~10/3/68), engine code T0926LM

Thanx for everyone's help and advice.

[Anthony S.]

Re: 69 L36 Radiator Part Number

Floyd, the 3937793 intake manifold goes with a 1968 (late march introduction) for Corvette 427/390Hp (ref Chevrolet by the numbers). You are correct about the Julian date code on the Carb. The first 3 numbers are day of the year, and the last number gives the year of production. And the 7029207 Numbers goes with a 350/350 for 1969. best Tony

[Floyd B.]

Re: 69 L36 Radiator Part Number

Tony,

Thanx so much for the response. Does the intake manifold have a date code? I was getting pressed for time so when I saw that the casting number was wrong I moved on to other things. I don't remember seeing a date code.

Thanx Again,

-Floyd-

[Joe L.]

Re: 69 L36 Radiator Part Number

Tony,

Thanx so much for the response. Does the intake manifold have a date code? I was getting pressed for time so when I saw that the casting number was wrong I moved on to other things. I don't remember seeing a date code.

Thanx Again,

-Floyd-

Floyd-----


Date code is on the bottom of the manifold and cannot be seen when installed on the engine.

[Terry M.]

Re: 69 L36 Radiator Part Number

Well, I did buy the '69.

BTW, I forgot to take a picture, but this 427/390hp, 4spd, no A/C car had the "short" style dip stick. I have no way of knowing if it is original to the car. The car's sequence number is 3407 (~10/3/68), engine code T0926LM

Thanx for everyone's help and advice.

If it is S/N 3407 it would be nearer the end of October of 1967 What is the color of the plug in the dipstick handle (if there is one)?

[Floyd B.]

Re: 69 L36 Radiator Part Number

If it is S/N 3407 it would be nearer the end of October of 1967 What is the color of the plug in the dipstick handle (if there is one)?

Okay. I'm trying to figure out where I went wrong calculating the build date. According to the information I have, the last unit built in September was 3041. The final number for October was 6272. 6272 - 3041 = 3231 units for October. 31 days in Oct-69 minus 4 Sundays is 27. 3231/27 = ~120/day. 3407 - 3041 = the 366th car of October. 366/120 = the start of day 4 which would be Saturday, October 4th 1968. Please correct my mistake.

I'll get you a picture of the dipstick in a few weeks. I bought the car in MI and will have it shipped to my home in FL next week but I'm currently living in PA. I'll have my son take pictures of it when it arrives in FL.

[Terry M.]

Re: 69 L36 Radiator Part Number

Okay. I'm trying to figure out where I went wrong calculating the build date. According to the information I have, the last unit built in September was 3041. The final number for October was 6272. 6272 - 3041 = 3231 units for October. 31 days in Oct-69 minus 4 Sundays is 27. 3231/27 = ~120/day. 3407 - 3041 = the 366th car of October. 366/120 = the start of day 4 which would be Saturday, October 4th 1968. Please correct my mistake.

I'll get you a picture of the dipstick in a few weeks. I bought the car in MI and will have it shipped to my home in FL next week but I'm currently living in PA. I'll have my son take pictures of it when it arrives in FL.

Floyd for C3s we usually just use the date on the trim tag. I suspect you (or your son) will find C01 or C02, based on other cars built around that time. I made a mistake about the end of the month, but my main point was the calender year.

[Floyd B.]

Re: 69 L36 Radiator Part Number

Floyd for C3s we usually just use the date on the trim tag. I suspect you (or your son) will find C01 or C02, based on other cars built around that time. I made a mistake about the end of the month, but my main point was the calender year.

I posted an image of the trim tag in another thread. The code reads C02. Since it's a '69 model year, would the production date be October of '68?

Thanx,

[Joe L.]

Re: 69 L36 Radiator Part Number

I posted an image of the trim tag in another thread. The code reads C02. Since it's a '69 model year, would the production date be October of '68?

Thanx,

Floyd-----


Yes, October, 1968.

[Terry M.]

Re: 69 L36 Radiator Part Number

I posted an image of the trim tag in another thread. The code reads C02. Since it's a '69 model year, would the production date be October of '68?

Thanx,

Thank you Floyd. 1969 model year is rather confusing. Since it went over 17 months there were two sets of August to December months -- a set in 1968 and a set in 1969. So confusing it even gets me mixed up.

A= August 1968
B= September 1968
C= October 1968
D= November 1968
E= December 1968

and on to:

M= August 1969
N= September 1969
O= October 1969
P= November 1969
Q= December 1969

Further that with the difficulty of telling the trim tag stamp C or G (which happens in all years 1964 to 1982) M or N or O or Q and (the latter being unique to the 1969 model year) and life on the judging field can be a lot of fun for the judges and Team Leaders.

Sorry for the confusion on my part. You had it right all along. I failed to follow your link in the other thread you posted about sidepipes. I hate them worse than Joe does after having a 1969 with that option -- briefly.

[Dale C.]

Re: 69 L36 Radiator Part Number


Dale