70 Shielding Again

[Bill L.]

I have been studying the AIM and reading the JM. Still confused. The serial number on mine is 11,327. The only original pieces of the shielding remaining are the two supports on the intake. They indicate a one piece shield. However, the JM indicates the box type shielding.

I checked archives too and I think I may be getting slow or something

What should I do?

Also, the AIM confuses me regarding attaching the heat shields and ignition shielding.

Has anyone put together some photographs while putting theirs together they could share?

This is what I have surmised thus far. There are 4 heat shields that attach to the block with 1/4-20 bolts with built in washers. (Anchor head marking?) There are also some clips that are attached with the same 1/4-20 fasteners that attach the heat shields to the block. These clips are used to attach ignition shield with the wing nuts. Do any of the exhaust manifold bolts also get used to attach the heat shields. If so, do they go behind or in front of the french locks on the outside exhaust manifold bolts?

On which bolts do the spark plug wire clips along the oil pan get attached? How many smaller bolts up from the larger bolts on each back corner of the oil pan?

Exactly how do the V shields get attached? Looks like they use one of the motor mount bolts and another 1/4-20 to attach to the block.

Thanks for your patience here. I have no prior point of reference regarding the shielding.


Bill

[Terry M.]

Re: 70 Shielding Again

Bill,

I can do some of your questions, but others will have to help. Let's be clear:
Heat shields are galvanized (zinc plated) -- there are four of them and each attaches with a single 1/4-20 hex head bolt.

Ignition shielding is, for the most part, flash chrome. It consists of a distributor shield, two vertical shields, two side-mounted V-shields, and two to four spark plug shields. All these, except the V-shields, attach with various numbers of wing bolts.

If you are convinced your distributor shield supports are original, the go with the one-piece shield. The serial numbers given in the judging manual are based on our observations, and are not to be taken as absolute, especially in the face of original evidence from your car. Do take photographs that you can present if you are challenged.

The V-shields attach as you describe.

The spark plug shields (two to four) attach to the exhaust manifold fasteners with zinc-plated brackets under the manifold fasteners and use wing bolts to fasten to the brackets. The brackets are shown in the AIM and are available from all the common vendors. There are discernable differences between the reproduction brackets and originals. One of the more "fun" Corvette jobs is figuring out which bracket fits in which position and then getting everything lined up. Leave the exhaust manifold fasteners lose until you have the wing bolts into the shield and bracket.

Enough keyboarding.

[Bill L.]

Re: 70 Shielding Again

Okay I think I have figured out the heat shields. Now what parts of the shielding are held on via the exhaust bolts?

What head markings should I be looking for regarding the heat shield and then the two spark plug brackets mounted on the back of the block?

Thank you Terry! I am continually amazed at the information you have in your head.

[Terry M.]

Re: 70 Shielding Again

Just a hint: U69 section of the 1970 AIM.

No headmarks, but it will show you the spark plug shields and the brackets that attach to the exhaust manifold bolts. A picture is worth a lot of words -- and it is less keyboarding.

[Steven G.]

Re: 70 Shielding Again

Terry, Where Or What Is Aim? Uniformed Steve

[Patrick H.]

Re: 70 Shielding Again

Terry, Where Or What Is Aim? Uniformed Steve

Assembly Instruction Manual = AIM

[Terry M.]

Re: 70 Shielding Again

AIM = Assembly Instruction Manual. In spite of Pat's picture it is available from a lot of suppliers including NCRS. Click on the radio button that says "NCRS Store" at the top of the page.

It is a collection of the pages of instructions used by the assemblers in St. Louis.

Anyone who intends to do any work on his or her Corvette, much less "restore" it should build a library of resource material. This should include, but is not limited to:
Owner's Manual
Factory Service Manual for the year of the car -- This may be one or two books depending on the year of your Corvette.
The NCRS TIM&JG = Technical Information Manual and Judging Guide
AIM for the year of your car.
Vette Vues Fact Book by M. F. Dobbins for the generation of your Corvette
If you are "restoring" the Chassis consider the Chassis Restoration Book (Sorry I can't remember the exact title) by Joe Trippoli.
If you are working on a C1 or a C2 you should also get a copy of Noland Adams' books that cover those years. These were out of print for a while, but I believe they are now back in publication.

ALL of these reference materials are available from the "NCRS Store" radio button at the top of the page. This list is just a beginning. Depending on the year of your Corvette there are other reference materials, which are valuable, but these are the basics.

[Bill L.]

Re: 70 Shielding Again

Thanks for the help Terry. I have reviewed U69 and the drawings leave a little to be desired unless you were able to see it assembled at least once.

I am getting kinda close to figuring out where all those pieces go. I am still really unclear regarding the order of assembly related to the pieces held on via the exhaust manifold bolts.

Plus I would still like to know about the head marks as well.

Thanks again for all the help

[Alan S.]

Re: 70 Shielding Again

Hi Bill,
Some of the vendors have very good 'exploded view' drawings of the heat and ignition shielding. Paragon, is one for example. Perhaps looking at some of these drawings might help you figure out what goes 'where and how' on your car in a way the AIM doesn't.
The bolts for the 2 rear wire support brackets, and the 4 spark-plug heat shields on my 71 have 2 different bolt heads. All are recessed hex head, 2 have an 'A' in a circle and the other 4 have 'SEMS' in two concentric incomplete circles. Remember that there were many suppliers for bolts, so there may well be other appropriate head markings.
Regards,
Alan