Intake gaskets and bolts on Tpi engine
#1
Intake gaskets and bolts on Tpi engine
I recently took off intake because I had bad injectors...so when put everything back together I discovered that I was leaking oil from the back of my intake on driver side ...so I did not use a gasket...but I put red RTV silicone on the China wall.
so I have to take it all apart now ...and I'm confused why people are saying don't use the gasket? Every time I've ever did a sbc I used them ..so why aren't they recommended now? And I want to change these stupid Allen torque bolts out to hex style ones..what are the sizes for intake to l98 aluminum heads bolts?
so I have to take it all apart now ...and I'm confused why people are saying don't use the gasket? Every time I've ever did a sbc I used them ..so why aren't they recommended now? And I want to change these stupid Allen torque bolts out to hex style ones..what are the sizes for intake to l98 aluminum heads bolts?
Last edited by gpatterson8167; 09-12-2018 at 07:34 PM.
#2
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Re: Intake gaskets and bolts on Tpi engine
The gasket that are supplied for the china wall push out and leak often. Were as rtv doesn't push out and seals nearly every time. As long as there's enough applied (which isn't all that much) it will seal. The rtv also helps hold the manifold gaskets stay in place while you lower the intake on.
As far as bolt, lots of venders offer kits. Ebay probably has some, you can piece them together your self if you know the sizes you need and Hawks has a kit seen here... http://www.hawksmotorsports.com/87-9...nner-bolt-kit/
As far as bolt, lots of venders offer kits. Ebay probably has some, you can piece them together your self if you know the sizes you need and Hawks has a kit seen here... http://www.hawksmotorsports.com/87-9...nner-bolt-kit/
#3
Re: Intake gaskets and bolts on Tpi engine
The gasket that are supplied for the china wall push out and leak often. Were as rtv doesn't push out and seals nearly every time. As long as there's enough applied (which isn't all that much) it will seal. The rtv also helps hold the manifold gaskets stay in place while you lower the intake on.
As far as bolt, lots of venders offer kits. Ebay probably has some, you can piece them together your self if you know the sizes you need and Hawks has a kit seen here... http://www.hawksmotorsports.com/87-9...nner-bolt-kit/
As far as bolt, lots of venders offer kits. Ebay probably has some, you can piece them together your self if you know the sizes you need and Hawks has a kit seen here... http://www.hawksmotorsports.com/87-9...nner-bolt-kit/
#4
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Re: Intake gaskets and bolts on Tpi engine
Yeah, nobody uses those gaskets and the TPI Felpro gasket kit comes with a tube of RTV because the only way to make the intake seal is to use RTV and the gaskets. </sarcasm>
Intake to head bolts on a SBC are 3/8-16" GM used Torx bolts because they're the best choice for the application.
I won't go in depth trying to change your mind, I'll just tell you there's nothing wrong with the bolts or using RTV at the front and rear of the block. I'd be cleaning the bolt threads and using Permatex thread sealer on reinstall. Next take a good look at the oil pressure senders, switches, ports in the block, etc. Not a lot of pressurized oil to leak at the back of the intake.
Intake to head bolts on a SBC are 3/8-16" GM used Torx bolts because they're the best choice for the application.
I won't go in depth trying to change your mind, I'll just tell you there's nothing wrong with the bolts or using RTV at the front and rear of the block. I'd be cleaning the bolt threads and using Permatex thread sealer on reinstall. Next take a good look at the oil pressure senders, switches, ports in the block, etc. Not a lot of pressurized oil to leak at the back of the intake.
#5
Re: Intake gaskets and bolts on Tpi engine
I looked at the plug that's originally for the sending unit but mine is plugged off with a plug..but I put a mirror back there and actually seen the oil coming from the Intake? I got some thinker rubber gaskets now so I'm try them with a bead of silicone?
#6
Re: Intake gaskets and bolts on Tpi engine
Yeah, nobody uses those gaskets and the TPI Felpro gasket kit comes with a tube of RTV because the only way to make the intake seal is to use RTV and the gaskets. </sarcasm>
Intake to head bolts on a SBC are 3/8-16" GM used Torx bolts because they're the best choice for the application.
I won't go in depth trying to change your mind, I'll just tell you there's nothing wrong with the bolts or using RTV at the front and rear of the block. I'd be cleaning the bolt threads and using Permatex thread sealer on reinstall. Next take a good look at the oil pressure senders, switches, ports in the block, etc. Not a lot of pressurized oil to leak at the back of the intake.
Intake to head bolts on a SBC are 3/8-16" GM used Torx bolts because they're the best choice for the application.
I won't go in depth trying to change your mind, I'll just tell you there's nothing wrong with the bolts or using RTV at the front and rear of the block. I'd be cleaning the bolt threads and using Permatex thread sealer on reinstall. Next take a good look at the oil pressure senders, switches, ports in the block, etc. Not a lot of pressurized oil to leak at the back of the intake.
#7
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Re: Intake gaskets and bolts on Tpi engine
I work on newer cars for a living and have a huge investment in my tools. My snap on torx sockets fits alot tighter in a brand new torx bolt than any of the other brands I have. Not saying that you don't have a good socket just saying that could be a culprit. Fwiw I've had my tpi intake completely apart at least 5 or 6 times with what I presume to be the original bolts. Those bolts can strip out easily if the slightest amount of grime is inside them as well.
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#8
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Re: Intake gaskets and bolts on Tpi engine
Torx bolts work great with proper tools and care. Cheap chi-knee sockets and adjustable wrenches will mangle traditional hex bolts just as bad as cheap chi-knee Torx bits from the red/yellow/green discount offshore one-time-use tool bin. Yet people will forever blame the bolts instead of using a better tool.
Not exactly a lot of torque on intake bolts. Really shouldn't be a problem under normal circumstances...
Not exactly a lot of torque on intake bolts. Really shouldn't be a problem under normal circumstances...
#9
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Re: Intake gaskets and bolts on Tpi engine
I swapped all my intake bolts to socket head allen stainless steel because the kit was cheap and I have a larger selection of sockets for them (ball tipped, etc). I didn't use a Fel-Pro kit - used one from the manufacturer that used to make Fel-Pro's gaskets for them before they off-shored everything and all their products turned to $hit. And used straight RTV on the china wall. I did have to bead-blast the intake mating surface, fill the pits with epoxy (JB weld), and block sand it smooth to get a proper seal.
GD
GD
#10
Supreme Member
Re: Intake gaskets and bolts on Tpi engine
I work on newer cars for a living and have a huge investment in my tools. My snap on torx sockets fits alot tighter in a brand new torx bolt than any of the other brands I have. Not saying that you don't have a good socket just saying that could be a culprit. Fwiw I've had my tpi intake completely apart at least 5 or 6 times with what I presume to be the original bolts. Those bolts can strip out easily if the slightest amount of grime is inside them as well.
For sealing the intake I've learned to use GM Engine Sealant for the china walls. You can buy it at most GM dealers. It's thicker than other RTV. Otherwise, use The Right Stuff from Permatex. It's also thicker than most RTV so it works better to fill the space between the manifold and block. I smear a thin coat of regular RTV (finger tip) around both sides of each coolant passage, leave the intake ports dry. Then use the thread sealant pictured above on the four front a and four rear bolts(where they might go into water). You can use thread sealer on all the bolts, won't hurt anything, just not needed.
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#15
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Re: Intake gaskets and bolts on Tpi engine
No need for the "High Temp" version. The reason to use the General Purpose over the High Temp is economy. .20oz of High Temp is $5-6. 1oz of Gen Purp is the same $5-6. So you get 5 times as much product for your kopeks. The 4oz bottle is under $10 and is pretty much a lifetime supply. The 1.7oz tube of High Temp is $13. A kopek saved is a kopek earned. Waste not, want not. Dang ol 401k, tell you what...
#17
Supreme Member
Re: Intake gaskets and bolts on Tpi engine
Only problem with the Teflon liquid is the stuff dries up in the bottle once it's been opened. It finally gets so thick it's useless. Maybe, if you seal it up in a ziploc baggy for storage. Aha, what an idea! Problem here at the shop is 3 guys using it. I'm sure the line techs aint gonna bother with the f-n baggy.
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Re: Intake gaskets and bolts on Tpi engine
This is probably the best example video of the use of RTV
follow this guys instructions and it should'nt leak - the little corner beads are where a lot of people go wrong
follow this guys instructions and it should'nt leak - the little corner beads are where a lot of people go wrong
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