Need diagram for early 70 / late 70 ignition shielding?

[Mike F.]

Does anyone have a diagram of the early / late 70 ignition shielding?

Trying to figure out what I have and what I need. My VIN #9516 is a May car; is that considered early or late?

The distributor cover is two piece (early?) , but the sparkplug shielding/attachments don't exactly match the diagram that I have.

TIA,
Mike

[Pat M.]

Re: Need diagram for early 70 / late 70 ignition shielding?

Mike, I have a May built car so I can post pics of my shielding if you'd like. But what confuses me is my VIN is in the 9700 range. Can two May built cars have VINs that far apart?

[Mike F.]

Re: Need diagram for early 70 / late 70 ignition shielding?

Mike, I have a May built car so I can post pics of my shielding if you'd like. But what confuses me is my VIN is in the 9700 range. Can two May built cars have VINs that far apart?

Typo on my part, VIN is 9516.

In May 1970 they built 2338 cars.

http://corvettec3.ca/numbers.htm

Any pics would be great, but I'm not sure if they will have enough detail to show spacers, washers, etc..

Mike

[Pat M.]

Re: Need diagram for early 70 / late 70 ignition shielding?

Typo on my part, VIN is 9516.

In May 1970 they built 2338 cars.

http://corvettec3.ca/numbers.htm

Any pics would be great, but I'm not sure if they will have enough detail to show spacers, washers, etc..

Mike

Ahh, I didn't think there could be nearly a 3800 difference in VINs both built in May. If I can find a good diagram I'll post one.

[Terry M.]

Re: Need diagram for early 70 / late 70 ignition shielding?

Does anyone have a diagram of the early / late 70 ignition shielding?

Trying to figure out what I have and what I need. My VIN #9516 is a May car; is that considered early or late?

The distributor cover is two piece (early?) , but the sparkplug shielding/attachments don't exactly match the diagram that I have.

TIA,
Mike

Mike,

Except for those two black things, it looks like all that is missing is one rear vertical piece. The black things are radiator mounts, I think -- so get them out of there. The four smaller chrome pieces are in the correct positions as they are installed on the engine. Now all you have to do is get the heat shields (the zinc plated things) in the right positions.

If you have two pan head zinc Phillips sheet metal screws in there, they go on the passenger side of the distributor shield. The wing bolts hold the rest of it together.

I don't think you will find a diagram for the heat shields. They were installed at the engine plant, so St Louis did nothing with them. You will need to lose the orange overspray on one of them. The chrome spark plug shields (at least the rear ones) are in the U69 section of the 1970 AIM, and if you can get the pages from a 1969 AIM for the U69 section you will have the front chrome shields.

[Pat M.]

Re: Need diagram for early 70 / late 70 ignition shielding?

Hey Mike, here's the diagram from the 70 AIM Terry was referring to:

[Mike F.]

Re: Need diagram for early 70 / late 70 ignition shielding?

Is my car an early or late 70?

What is item # 1? (first pic)

I have seven item # 2's. Some are bent at a 90, others at a 45. Do I need eight? (first pic)

Besides the vertical piece, do I need items 5, 12, and 14?
There seem to be some washers/spacers and a strap that aren't marked with a part number. (second pic)

Thanks

[Larry M.]

Re: Need diagram for early 70 / late 70 ignition shielding?

Item #1 holds the oblong rubber grommet that separates the 4 plug wires as they run down the driver's side rear vertical shield.

It should bolt to the rear of the block with a bolt hole just above the 3970010 casting number. Some sort of J-nut will slide over the hole on the bracket near the grommet end, which is where the wing bolt will attach the vert shield.

Larry

[Terry M.]

Re: Need diagram for early 70 / late 70 ignition shielding?

Is my car an early or late 70?

What is item # 1? (first pic)

I have seven item # 2's. Some are bent at a 90, others at a 45. Do I need eight? (first pic)

Besides the vertical piece, do I need items 5, 12, and 14?
There seem to be some washers/spacers and a strap that aren't marked with a part number. (second pic)

Thanks

Yes you will need 8 of item #2. You will have to find what ones (which angle) fit in which position via trail and error. So far as I know there is no road map for these brackets. One tip: Do not tighten down the exhaust manifold bolts until you have the chrome shielding in place.

Yes you will need items 5, 12 & 14. You should be aware that Item 5 (commonly called the "boomerang shield") is different for each side and the 1970 and newer pieces are different than 1968 & 1969 pieces because the motor mount is different for the earlier cars. The good news is you need the more common item it was the same for 1970 and newer into the later 1970s. They made tens of thousands of them. You may want to search this board for threads expounding on the differences before you start your parts search.

[Michael D.]

Re: Need diagram for early 70 / late 70 ignition shielding?

...Is my car an early or late 70?...

"Early" and "Late" usually refer to running changes made on the assembly line. You can check the Judging Guide for dates/VIN ranges of known changes. AIM pages will sometimes show drawing revision dates for other changes.

Since 70 production began in January and ended in July, a 70 assembled in May was after the halfway point and could be considered late as far as production is concerned.

[Mike F.]

Re: Need diagram for early 70 / late 70 ignition shielding?

I know there was a difference in distributor shielding between early and late cars.
Was there any difference in spark plug shielding between early and late cars?

Thanks,
Mike

[Terry M.]

Re: Need diagram for early 70 / late 70 ignition shielding?

Is my car an early or late 70?

Thanks

With respect to the radio shielding, which is the subject of this thread, your 1970 has the "early" style shielding. That is the box distributor shield and the four chrome spark plug shields are all "early" 1970 features.

With respect to some other matters your Corvette may be either early or late; it just depends on where during 1970 production those changes were made. The terms early or late have little meaning unless they are taken within the context of a specific feature. Of course if your car was built during the first month of production or the last month of production the entire car would fit into one of those categories, but that will not work for the vast majority of Corvettes.

[Terry M.]

Re: Need diagram for early 70 / late 70 ignition shielding?

I know there was a difference in distributor shielding between early and late cars.
Was there any difference in spark plug shielding between early and late cars?

Thanks,
Mike

"Late" 1970 had spark plug shields only over the rear pair on each side. "Early" cars had four spark plug shields. No configuration difference in the shields, only more of less of them.

[R N.]

Re: Need diagram for early 70 / late 70 ignition shielding?

Mike,

Except for those two black things, it looks like all that is missing is one rear vertical piece. The black things are radiator mounts, I think -- so get them out of there. The four smaller chrome pieces are in the correct positions as they are installed on the engine. Now all you have to do is get the heat shields (the zinc plated things) in the right positions.

If you have two pan head zinc Phillips sheet metal screws in there, they go on the passenger side of the distributor shield. The wing bolts hold the rest of it together.

I don't think you will find a diagram for the heat shields. They were installed at the engine plant, so St Louis did nothing with them. You will need to lose the orange overspray on one of them. The chrome spark plug shields (at least the rear ones) are in the U69 section of the 1970 AIM, and if you can get the pages from a 1969 AIM for the U69 section you will have the front chrome shields.

Terry....

Do you know the size of these screws? I too have the early style box shielding and "Buba" replaced the screws with rivets Thank you.

[Terry M.]

Re: Need diagram for early 70 / late 70 ignition shielding?

Terry....

Do you know the size of these screws? I too have the early style box shielding and "Buba" replaced the screws with rivets Thank you.

Sorry, I do not know the size of these screws. I know there was a thread about them in the last year or so, but I think it only has pictures. I don't recall that it had any dimensions, and mine are now relatively inaccessible.