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  #1  
Old 08-01-2018, 04:09 PM
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Default Intake Manifold question

hi everyone,

Taking Simplyconnected's suggestion, I got a new battery ground cable and went right from the negative post to the starter.

So to part with the old cable. It is bolted to the intake manifold in the front - right next to the oil filler cap.

I am hesitant to remove the bolt lest I mess up the overall tightness of the manifold to the block and thus induce a leak. Kind of goes against the criss-cross installation process.

Might be my caution from dealing with modern, alloy heads that are prone to leaking.

Any thoughts? Occurs to me that if worst comes to worst I can just cut the cable off near the bolt with a hacksaw blade and be done with it. Really won't show.

thanks!
john
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  #2  
Old 08-01-2018, 05:50 PM
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The ground cable was bolted to the generator bracket from the factory so someone bolted it to the intake after the fact. Since it's already been taken out once it probably won't hurt to do it again but if you feel more comfortable just cutting it then go for it.

John
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  #3  
Old 08-02-2018, 01:40 PM
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Quote:
Originally Posted by JohnG View Post
...I am hesitant to remove the bolt lest I mess up the overall tightness of the manifold to the block and thus induce a leak. Kind of goes against the criss-cross installation process...
Good question, John. After all the bolts are torqued, it's ok to take one out and put it back in without going through the torque pattern.

Bolts that go through the water passages can be sealed with either Teflon (PTFE) paste or Permatex Black (or red or gray, etc). I keep a jar of PTFE thread sealant in my garage. It never ages or hardens and it's MUCH better than sealants from back in the day. BTW, I use this on gas and water pipe threads as well. - Dave
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Old 08-03-2018, 12:18 AM
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thanks, Dave! I have a Permatex version of the same. I will go with that.

John
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Old 08-03-2018, 11:01 AM
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Quote:
Originally Posted by JohnG View Post

I am hesitant to remove the bolt lest I mess up the overall tightness of the manifold to the block and thus induce a leak. Kind of goes against the criss-cross installation process.
Any thoughts?
john
The loosening of a singular fastener on the cast iron(?) intake manifold and cylinder heads, and then re-torquing, in of its' self should not cause any concern, as the components and engineering involved is more than substantial enough to endure the process.

But, if the sealing gasket(s) and their original installation are of antiquity, with the associated hardening of the gasket(s), with corrosion at this point an actually a participant in the current sealing process, loss of the original clamping force imparted throughout even before one embarks, and then existing sealing effect lost due to movement in the process, well....... maybe......?

Scott.
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Old 08-03-2018, 06:52 PM
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the motor was rebuilt in 2005. At the time the battery ground went to this same bolt. Later a quick decision was made like "well, it came off of that bolt so it's goin' back where it came from" and we moved on. Some research should have been done but hindsight is once again 20-20.

It has about 18K miles since then.
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