underbody heat shields C-3?

[Steve Wallach]

Does anyone have a picture of what the under body shielding should look like on a 68 4spd coupe? Mine was built in February of 68. The fire wall foot wells don't have the studs riveted in nor does it appear they were ever there for the plastic shields? Also, should it have the metal shields (triangle) up front and the rectangular metal shields rear of those or is it one or the other? The metal tabs are all over the place for the foil insulation which was gone, but was there at some point.

Thanks for any help on this as the AIM isn't clear?

Steve

[Dick W.]

Re: underbody heat shields C-3?

Steve, here is what the manual says about it. A heat-insulating blanket made of yellow fiberglass sandwiched between aluminum foil is found above the transmission. It is held in place by clips on the inside of the transmission tunnel fiberglass. On early 1968 cars, a fiber-reinforced aluminum foil batting is used in front of the toe pan. An opaque white plastic shield in front of the toe pan appears in late 1968 production. It is notched on the passenger's side to clear the heater hoses. In addition, a unique triangular-shaped metal heat shield, painted semi-gloss black, extends from where the frame rail begins to curve inward to the toe pan on each side in early 1968s. From S/N 9939, another set of heat shields is added. These are rectangular in shape and extend from the toe pan back to the cross brace and from inside the frame to the transmission. This second set of heat shields is described in a Dealer Technical Service Bulletin (TSB) of 22 April 1968 and may appear on earlier cars as a result. A TSB of 17 December 1968 recommends the removal of the triangular heat shield on early 1968 cars and the addition of the rectangular heat shield described above

I would suggest that you purchase a Technical Information Manual and Judging Guide for the online store on this site. It has this informationa and a wealth of other information about your car.

[steve wallach]

Re: underbody heat shields C-3?

Thank you,

I do have the judging guide and the assembly manual, but they aren't that clear. If I could see one that is correct as well as reading the manuals it sure would help.

It appears mine should not have the plastic toe shield and probably should have both sets of metal shields along with the batting?

By the way, my 68 judging guide did not come with pages 53/54?

Thank you again,

Steve

[John C.]

Re: underbody heat shields C-3?

Steve

My 68 conv built in mid April still has all it's orginal heat shielding in place. Besides the foil insulation the only heat shielding it has is the large trianglular metal shield.

John

[Steve Wallach]

Re: underbody heat shields C-3?

John,

Thanks, my car was built in Feb.68 and I think it is supposed to have both
sets of metal plates. It appears that in April, they stopped using the second set. They don't seem like they would stay on for long, so that's probably why they discontinued using them?

Thanks again,

Steve

[Terry F.]

Re: underbody heat shields C-3?

Steve, your car only had the aluminum foiled yellow insulation on it. It had no steel floor pans and it had no plastic firewall shields. I say that because the change to the shielding occured later in production than Feb 1968. Also, your car should have the large triangular sheet steel pieces located between the frame and the engine on each side of the car (unless someone removed them). That is all it came with.

Now.....the tech bulletin tells you what parts should be ordered and how to install the parts on the car to up-date the shielding. It also tells you to get rid of the large triangular sheet steel pieces to improve air flow through the engine compartment.

Thanks, Terry

[Terry F.]

Re: underbody heat shields C-3?

Steve, your car did not have the large rectangular sheet steel pieces that went under the floor pan either. The insulation was glued on the underside of the car and that is all. Yes, it probably fell off and looked like hell in about 5 minutes after being driven off the lot new. I am sure people on the assembly line got a giggle out of it also.

Terry

[Steve Wallach]

Re: underbody heat shields C-3?

Thanks Terry,

Do you know where I can get a copy of that bulletin? My car has the screw holes for the Triangle sheet steel. They were not there when I got the car. It appeared that several things were done to attempt to keep the engine cooler, different fan, no smog pump, no insulation, no heat shields, etc.

So I'm trying to fit things back together as they should be?
My 67 still had what appered to be the original triangle shields.

I can tell that there was foil insulation on my 68 as there are still remnants and the riveted tabs are all over the place. There are no holes or riveted studs for toe shields, so I don't believe my car had those.

Thanks agian,

Steve

[Terry F.]

Re: underbody heat shields C-3?

Yes, I have several bulletins for 68. Contact me at tfringo@aol.com, Terry

[Jim T.]

Re: underbody heat shields C-3?

Steve I have a original owner 68 built in Feb. It still has the triangular steel pieces that is attached with fastners at four locations, three into the frame and one at a steel brace attached to the fiberglass flooring. Have several locations of sharp pointed steel brackets that were used to retain the foil backed fiberglass insulation. Still have some the original insulation on the drivers side between the steel shield and the floor. By 1975-76 most of the original insulation was gone, hanging down, pulled off. Although the car is a garage queen now, I thought about reinstalling some new insulation when I had to rewrap some heating/air conditioning ducting under the house with similar insulation.

[Chris1977]

Re: underbody heat shields C-3?

i own a 77 with the pans under the seats. I just lost my last pan the other day. Luckily I heard it sliding under the car and was able to jump into traffic to save it.

That being said, does anyone make these pans, the attaching hardware, and was there insulation between the pan and the floor on the 77?

Thanks for the help.

Chris

[Kurt B.]

Re: underbody heat shields C-3?

Dr. Rebuild sells these parts in his catalog. You need to get yourself one of his catalogs, they are almost like a parts book. Well worth the price which is refundable when you place an order.
Kurt # 26406

[Chuck R.]

Re: underbody heat shields C-3?

My June built, four speed, small block coupe only has the two tin shields under the floor boards for what it's worth.

Regards,

Chuck

[Terry F.]

Re: underbody heat shields C-3?

If you get a chance, look at the area near where the steering column comes out and look for two threaded screws to attach the plastic fire wall shields. There might be some on the passenger side also. I would would like to know. The other thing to check for would be the screw holes in the frame just behind each front wheel. They were used to hold the triangle shaped shields in place on the earlier cars. I am wondering if your car has both. Thanks, Terry

[Chuck R.]

Re: underbody heat shields C-3?

Terry, isn't the triangular frame mount tins just splash shields and not heat shields?