Lower core support bolts/T Top trim sealant

[Kevin G.]

Trying to help a friend..........

Two quick questions, first on a 70 LT1 would the four lower core support bolts (facing upward) be painted or natural? They are natural(rusty) on my 71, without any overspray or blackout. I thought I had read this info in one of the JG but can't seem to find it now.

Second, same LT1, looking for the correct sealant under windshield trims, t top header trim and rear halo trim. As well as where and how much sealant? Pictures would be a great help, I didn't take any photo's when removing the trims from my 72.

As always TIA

Kevin

[Terry M.]

Re: Lower core support bolts/T Top trim sealant

Trying to help a friend..........

Two quick questions, first on a 70 LT1 would the four lower core support bolts (facing upward) be painted or natural? They are natural(rusty) on my 71, without any overspray or blackout. I thought I had read this info in one of the JG but can't seem to find it now.

Second, same LT1, looking for the correct sealant under windshield trims, t top header trim and rear halo trim. As well as where and how much sealant? Pictures would be a great help, I didn't take any photo's when removing the trims from my 72.

As always TIA

Kevin

There have been several recent lengthily threads on the windshield trim sealant -- complete with pictures. Had the title of your thread started with that subject matter the "auto search' function likely would have brought them up. This is one of the down-sides of posting two questions in one thread. Try searching on windshield trim sealant, and see what you get.

I wish I knew which bolts you were referring to in your other question, and I would go look. Maybe someone else will get that one and help out.

[Bill C.]

Re: Lower core support bolts/T Top trim sealant

Kevin,


The 4 lower support bolts on my car were natural (they had surface rust when I 1st dissambled the car).

You can use 3M strip caulk for the windsheild trim, works really nicely.

[Kevin G.]

Re: Lower core support bolts/T Top trim sealant

Terry, Thanks for the pointer on the double questions. I did search and found several threads on both questions. Without an exact answer on either and didn't find any photo's of the sealant?

As far as the bolts, I'm talking about the four across the bottom facing upward that attach the lower support? Where the supports are sometimes shimmed.

Save the Wave,

Kevin

[Kevin G.]

Re: Lower core support bolts/T Top trim sealant

Kevin,


The 4 lower support bolts on my car were natural (they had surface rust when I 1st dissambled the car).

You can use 3M strip caulk for the windsheild trim, works really nicely.

Bill,

Thanks for the second on the "rusty" bolts. that's my opinion as well.

Happen to have pictures of the placement of the sealants?

Thanks again,

Kevin

[Paul O.]

Re: Lower core support bolts/T Top trim sealant

Kevin glad you made it back from Charlotte. The cars I have disassembled including mine the bolts on the threads there was remnants of Cad or Zinc plating. If you have taken the bolts out take a close look at the threads to see if you have the same if not to rusted. On the sealant try an RV shop they use a light Grey type sealant to seal openings they make to install accessories. The sealant is installed where the leading edge trim and the top trim meet and the corner post trim and top trim meet. Also have seen the sealer installed under the corner post trim and at all the hold down fasteners. Paul 18046

[Bill C.]

Re: Lower core support bolts/T Top trim sealant

Kevin,

Just an FYI ---
I put my car back together with natural/CAD plated bolts.
The 1st time it was judged in Kissimmee I was told by the chasis judge that all the cars came with black oxide bolts and was given deductions accordingly.

So I replaced all my original CAD replated bolts with blackoxide and the next time it was judged, it was not deducted.

I know 100% for sure that my car had CAD bolts, I noticed (just like Paul said) the CAD plating mid way down the bolts where rust did not set in.

Just a story I thought I share.

[Patrick H.]

Re: Lower core support bolts/T Top trim sealant

Kevin,

Search "windshield header"

https://www.forums.ncrs.org/showthre...eader&uid=9554

[Paul O.]

Re: Lower core support bolts/T Top trim sealant

Bill I would buy ether Blackened or Cad bolts if I were judging the chassis. I have seen different manufacture bolts in these positions so one could assume there could be different finishes. In many other places on the car's you could see this Blackened, Cad, Chrome and etc one type of finish is not always correct. Paul 18046

[John H.]

Re: Lower core support bolts/T Top trim sealant

I think some folks may confuse dark phosphated bolts for "black oxide" bolts; black oxide was a VERY expensive premium finish for fasteners, and I don't think I've ever seen an OEM black oxide bolt on a Corvette. If you want to see what black oxide finish looks like, look at a black ARP bolt.

[Kevin G.]

Re: Lower core support bolts/T Top trim sealant

Thanks guy's great stuff!

Patrick the link is one of the threads I was thinking of, perfect!

Bill as always, your experience working on such an original car is a great benefit to all.

Paul, Thanks,Yes I did make it home but not without incident, lol! One of the wires from the alternator broke loose and of course the battery was next to go. I was able to find the broken wire in the dark repair it and travel the remainder of the trip! All in all I must say that the two meets that I have been to in Charlotte were hands down the must fun (PV, track laps,etc.)! I can't wait until next year, and have booked my room already.

Here's public thank you to all folks that helped me with my fuel pump problem! Y'all pretty nice down there!LOL

Regards,
Kevin

[Bill C.]

Re: Lower core support bolts/T Top trim sealant

John,

Black Phosphate is what I meant. My bad --

[Edward J.]

Re: Lower core support bolts/T Top trim sealant

Kevin, The Bolts You Are Talking About Were Black Phos. And The Bolt Threads Were Painted Where They Come Through The Core Support During Black Out Process, Per Judging Manuel, The Windsheild Sealant Is A Big Question These Days On C-3 Windsheild Mouldings , I Can Say I Have A Frenid With A Original 68 Conv. That Has The Sealant Still Intack With All The Original Glass 38k For Mileage , Its Color Is Gray/ Silver I Beleive That It Can Be Duplicated.you'll Have To Be Creative In Mixing Something That Looks And Flowed Like The Factory.maybe Like Gray Rtv Sealant With Alittle Silver Paint Mixed In. The 3m Chalking Is Black Which Really Stands Out Like A Sore Thumb. However The 3m Caulk Will Work Great On Areas Like The T-top Halo And Windsheild Pillers Area.