Corect bolts

[Calvin C.]

I am using the 1968-69 Corvette Technical information manual & judging guide, to get my engine ready for instal, however I can not find complete details on all the bolt markings for the bolts to make sure I have the corect ones. Is there an alternate or better source.

cal

[Joe L.]

Re: Corect bolts

I am using the 1968-69 Corvette Technical information manual & judging guide, to get my engine ready for instal, however I can not find complete details on all the bolt markings for the bolts to make sure I have the corect ones. Is there an alternate or better source.

cal

Cal-------


I don't know of a reference source for headmarkings for all of the bolts found on a Corvette engine. If there were one, it would only list some of the observed headmarkings and not necessarily all of the headmarkings that were used. In general, as long as you have period-correct headmarkings on the bolts, you should be ok as far as judging is concerned.

Paragon reproduces many of the bolts with original headmarkings but they only reproduce one or two headmarkings used. So, if you look at the Paragon bolt chart, whether you actually use their bolts, or not, you can usually identify one or two of the headmarkings used for each bolt. Just don't get to thinking that these were the ONLY headmarkings used and discard some original bolts.

[Jack C.]

Re: Corect bolts

Cal, state some specific bolt locations and we can chime in.

[Calvin C.]

Re: Corect bolts

Cal, state some specific bolt locations and we can chime in.

Intake manafold, exhaust headers, and water pump

thanks

cal

[Jack C.]

Re: Corect bolts

Motor size and hsp will help.

[Calvin C.]

Re: Corect bolts

Guess that would help, your up early it is 4:30 here in Ca. The engine is a 350 300, 69 coupe,

thanks

cal

[Patrick H.]

Re: Corect bolts

Intake will have probably 3 different types. Two holding the engine lift at the left front will probably have a slight shoulder to them. Then you'll find one headmark likely holding each of the spark plug wire holders at each rear corner, and a 3rd headmark makes up the balance of the bolts. Headmarks may vary. Repro kits will have all of the bolts the same - which is not how it "really" happened.

Exhaust is likely black TR bolts, good repros available.

Water pump could be TR, M or others. Again, good repro kits available.

See pics of my car in my signature if you want to look more; 69 vs 72 is very similar in this regard.

Patrick

[Rich P.]

Re: Corect bolts

Some pics of water pump hardware. on a 69 you should have 3 bolts and a stud. Now if you have A/C that changes things also.

Rich


2-4-10 e-bay 031.jpg

12-30-09 e-bay 011.jpg

[Rich P.]

Re: Corect bolts

Some correct intake bolts for 69.

Rich

[Rich P.]

Re: Corect bolts

A few more intake bolts. I dont think I have any exhaust manifold bolt pictures on file. If I get a chance later today r tomorrow I'll pull a set ot two out and take some pictures and post them.

Rich

Sorry disregaurd the TR bolts in this post they are grade 2 and for earlier cars. I will load up a picture of a set of correct TR's in the next post.

[Rich P.]

Re: Corect bolts

Here are the correct TR's. Now like Patrick said 69's (and this started in 68) used engine lift brackets so 3 of the bolts would most likely have a different headmarking. As well some of theose could be grade 8 instead of grade 5.

Rich

[Terry M.]

Re: Corect bolts

Here are the correct TR's. Now like Patrick said 69's (and this started in 68) used engine lift brackets so 3 of the bolts would most likely have a different headmarking. As well some of theose could be grade 8 instead of grade 5.

Rich

1968 to 1970 engine lift brackets used only one bolt on each lifting bracket. 1971 and newer used two bolts on the intake manifold lifting bracket.

[Tom M.]

Re: Corect bolts

Terry, is that small block only ? 427 had 2 bolts in front and 1 at rear for the lifting bracket

[Patrick T.]

Re: Correct bolts...

One bolt that I have never seen available in reproduction are the 3 original bolts on the top of my steering box. They have 'NAT' on the head of the bolt. PT

[Tom M.]

Re: Correct bolts...

One bolt that I have never seen available in reproduction are the 3 original bolts on the top of my steering box. They have 'NAT' on the head of the bolt. PT

Pat , yeah same goes for the chrome valve cover bolts 68-69 , 427 cars, the "NAT" bolts , hard to find