Anyone ever use these?
Thread Starter
Le Mans Master
Joined: Jun 2005
Posts: 5,037
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From: Texas
Anyone ever use these?
My friend recommended these to me for putting on my stock exhaust manifolds. Never heard of them myself but he puts stock in them. Anyone else ever use or know anything about Splitlock bolts?
Thread Starter
Le Mans Master
Joined: Jun 2005
Posts: 5,037
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From: Texas
Race Director
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Cruise-In II Veteran
Im agreeing...why would you need those for stock manifolds?
ALso,doesnt some of the manifold bolts have studs on them to connect like the dip tube,a/c or alt bracket and something else?
Ive seen people with headers have problems with bolts coming loose,so maybe those you posted work well there.But I have reused my stock bolts everytime for manifold removal and install and they never came loose.
Just asking,not trying to be a pryck.
ALso,doesnt some of the manifold bolts have studs on them to connect like the dip tube,a/c or alt bracket and something else?
Ive seen people with headers have problems with bolts coming loose,so maybe those you posted work well there.But I have reused my stock bolts everytime for manifold removal and install and they never came loose.
Just asking,not trying to be a pryck.
Team Owner
Joined: May 2002
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
You don't need them on the stock manifolds. Plus they probably don't make em long enough for the bosses.
The bosses are nice as they allow the torqued bolt to stretch more, and less likely to loosen up. This is because it has to rotate quite a bit more to come loose than a bolt on a 1/4" flange would.
The bosses are nice as they allow the torqued bolt to stretch more, and less likely to loosen up. This is because it has to rotate quite a bit more to come loose than a bolt on a 1/4" flange would.
Thread Starter
Le Mans Master
Joined: Jun 2005
Posts: 5,037
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From: Texas
I am removing my headers and installing stock manifolds which I bought from someone else. The stock manifolds dont have any bolts and I dont particularly care for my current locking bolts:
Not that they dont seem to work but they are a pain in the butt to remove, so installation will most likely be the same. My friend suggested the split locks to make the job a bit easier and still have the locking ability. Its a force of habit for me to want to lock anything that temperature cycles, vibrates, and/or is high energy (pressure, temp, etc...).
Not that they dont seem to work but they are a pain in the butt to remove, so installation will most likely be the same. My friend suggested the split locks to make the job a bit easier and still have the locking ability. Its a force of habit for me to want to lock anything that temperature cycles, vibrates, and/or is high energy (pressure, temp, etc...).
Team Owner
Joined: May 2002
Posts: 24,337
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
I put Percy's alumininum header gaskets on it and with all the time/money I saved on bolts, I spent on Budweiser.
I purchase all my hardware here:
mcmaster.com
Excellent catalog, high grade flange hex bolts and every single other type of fastener or material or tool you'll ever need, and cheaper than any hardware store if you can stand to wait for shipping.
I purchase all my hardware here:
mcmaster.com
Excellent catalog, high grade flange hex bolts and every single other type of fastener or material or tool you'll ever need, and cheaper than any hardware store if you can stand to wait for shipping.
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Race Director
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From: The Top of Utah
Originally Posted by Performance nut
Are you asking me why I would use a locking bolt on a part that is made from a different material than what it is connecting to and which also endures vibration and thermal cycling?
RACE ON!!!
Thread Starter
Le Mans Master
Joined: Jun 2005
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From: Texas
Race Director
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From: The Top of Utah
It really wouldn't have helped much, in that stock manifolds rarely leak, and you weren't already having a problem with them. And I was thinking, as mentioned above, that you would have a hard time finding a bolt like that long enough for stock manifolds.
RACE ON!!!
RACE ON!!!
Team Owner
Joined: May 2002
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Stock manifold bolts are 2" long. And I'm pretty sure the bolt head is not close enough to a header tube to use the other type of locking bolt you mentioned.
Thread Starter
Le Mans Master
Joined: Jun 2005
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From: Texas
Good to hear the stock manifolds dont leak, one less thing to worry about. Anyone got info on the stock bolts, I think I will try CentralCoaster's link to order bolts. I am thinking this should work but I am not sure how long, since obviously size matters. 
Head Style Flange 12 Point
Material Type Steel
Finish Plain
Grade/Class Not Rated
System of Measurement Inch
Inch Thread Size 1/4"-20
Thread Style Right Handed
Flange Diameter 3/8"
Specifications Met American Society for Testing and Materials (ASTM)
ASTM Specification ASTM A574
I base this on the bolts I am removing. The header bolts used a 3/8" to remove and the threads dont look fine (28 TPI).
Edit: Quick draw Central... while I was typing.
Head Style Flange 12 Point
Material Type Steel
Finish Plain
Grade/Class Not Rated
System of Measurement Inch
Inch Thread Size 1/4"-20
Thread Style Right Handed
Flange Diameter 3/8"
Specifications Met American Society for Testing and Materials (ASTM)
ASTM Specification ASTM A574
I base this on the bolts I am removing. The header bolts used a 3/8" to remove and the threads dont look fine (28 TPI).
Edit: Quick draw Central...
while I was typing.
Team Owner
Joined: May 2002
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Get something like this:
92316A632
You don't want to mess around with low grade bolts on exhaust. This is a really common size, even for a flange bolt, local Napa might also have them, or else Summit.
Bolts are 3/8-16x2in
92316A632
You don't want to mess around with low grade bolts on exhaust. This is a really common size, even for a flange bolt, local Napa might also have them, or else Summit.
Bolts are 3/8-16x2in
Thread Starter
Le Mans Master
Joined: Jun 2005
Posts: 5,037
Likes: 520
From: Texas
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
They usually don't carry flange bolts though. Regular hex bolts are harder to work with and require washers, so I prefer the flange bolts (so does the factory) if I can afford to wait the extra time for shipping. Especially on ones that go on from underneath or in hard to reach places. Try putting the oil pan in with flange vs regular bolts. Also strength isn't so important as withstanding corrosion and high temperature. Higher grade bolts will perform better. I guess strength would be most important when trying to remove a bolt that's rusted in place.
Last edited by CentralCoaster; Apr 17, 2007 at 03:05 PM.
