Why don't you just buy the correct length bolt to start with?

 

Blazin72

Have these bolts, washers and just curious. Not a matter of going out and buying new. Just want to learn something as well. I guess thats ok? What ya think?

 

1. Grade 8 bolts are overkill for this application

2. Nothing looks more "Barney Bolt-on" than stacks of washers on something, especially as high tech looking as a 6 shooter setup

3. Torque specs are derived from bolt material, thread count, pitch, etc. If GM or Barry Grant say 11 lb-ft of torque you would be well advised to follow that guideline. 8 or 10 intake bolts all at 11 lb ft will be more than enough to clamp a manifold in place. Why whould you need more?

 

Reread all of the above. Done? OK, now to answer the question, yep, it'll work. Not desirable, but will work. Make sure the bolts are tight on the washers and not bottoming out - and just because the washers may be tight, that doesn't mean they're not bottomed out. There's ways to test this but in this case, the cheese factor overrules an explanation.

 

What you can do is cut those bolts down..that is done by threading a nut on the bolt to the point at which you want the bolt to be cut and then using a cutoff wheel cut the bolt off flush with the nut. taking the nut off then straightens out the threads and a bit of touchup to the bolt end and you now have bolts of the correct length..

Sam

 

To all who answered with another question

I guess those folks did not read my question. Just so those doubters can sleep tonight, I want you know I can and know all about shortening bolts, running down to the store and buying new correct length bolts, so do me a favor and not answer my postings if it bothers you. Like I said just curious. Anyone got a thought on plastic manifold torque verses aluminum? Thanks

 

Sounds like you've got a good handle on it. I say we all move along.

 

Amen

Amen with enough of this. I am moving on. Thanks

 

"Sounds like you've got a good handle on it. I say we all move along."

Whatever you say, tex.

 

My question is I am putting a Demon 6 Pack on Vortec heads. I need 1 1/4" length bolt to attach intake but have 1 1/2 length grade 8's. If i use 4 grade 8 washers to get to 1 1/4 " length and then torque to 11 ft pounds, will the washers be ok or will washers cause incorrect torque? GM has a bolt just for the vortec head but looking for alternative with bolts I have. Also, GM says 11 ft lbs which does not seem like enough. I wonder if this torque spec is for use with composite intake on TFI and if you use aluminum intake should it be more ft lbs? I also am using the GM intake gasket which does not suggest using sealant around coolant inlets. Thanks in advance for your input.

Between the bolt head and the aluminum part should be hardened washer. These are high carbon heat treated washers of additional thickness designed such that they do not cup under compressive loads like mild and alloy steel washers will. They prevent the forces under the bolt head from deforming the aluminum part. Installation should include the use of thread lubricant on both sides of the washer so as not to distort the relationship between the torquing force of the wrench and the stretch of the bolt.

Bogie

 

Washers

Thanks Oldbogie, good info.