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03-18-2016, 07:19 PM
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#1 |
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Registered User
 
Join Date: Jun 2015
Location: weirton WV
Posts: 76
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i forgot a step #@&$
installed a new intake manifold and once i put it all back together i realized that i forgot to put RTV silicone around the water passages intake manifold side. Is this a MUST DO step?
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03-18-2016, 07:25 PM
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#2 |
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Registered User
Join Date: Jun 2015
Location: weirton WV
Posts: 76
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Re: i forgot a step #@&$
this is what i forgot to do
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03-18-2016, 07:36 PM
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#3 |
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Senior Member
Join Date: Jun 2005
Location: Winona Lake, IN
Posts: 6,266
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Re: i forgot a step #@&$
No. I put mine on with only a small dab of gray sealant where the side gaskets meet the end gaskets. And yes, I used the rubber end gaskets. I don't subscribe to using RTV in place of end gaskets. I used Victor manifold gaskets and have no leaks.
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70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear Last edited by 70STOVEBOLT; 03-20-2016 at 08:14 PM. |
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03-18-2016, 07:36 PM
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#4 |
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Registered User
Join Date: Apr 2013
Location: South Westerlo, New York
Posts: 1,325
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Re: i forgot a step #@&$
I know its alot of work, but if you didn't add coolant yet or fire it up, if it were me, I would tear it back off. nothing worse than running it and finding coolant in your oil.
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Thanks, Joe.. 1969 C/10, 348 C.I., 3X2 bbl. V8, 2004r , LWB. |
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03-18-2016, 08:21 PM
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#5 |
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Registered User
Join Date: Jun 2015
Location: weirton WV
Posts: 76
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Re: i forgot a step #@&$
i did not add any fluids yet. it should only be half day of work. thanks hamjet
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03-18-2016, 08:50 PM
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#6 |
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Senior Member
Join Date: Jun 2005
Location: Winona Lake, IN
Posts: 6,266
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Re: i forgot a step #@&$
You do however need to put sealant on certain intake bolts on a big block.
__________________
70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear |
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03-18-2016, 08:51 PM
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#7 |
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Senior Member
Join Date: Jun 2005
Location: Winona Lake, IN
Posts: 6,266
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Re: i forgot a step #@&$
What type of gaskets did you use?
__________________
70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear |
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03-18-2016, 08:55 PM
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#8 |
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Registered User
Join Date: Jun 2015
Location: weirton WV
Posts: 76
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Re: i forgot a step #@&$
i used a beaded gasket that edelbrock suggested
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03-19-2016, 12:53 AM
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#9 |
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Senior Member
Join Date: Jul 2010
Location: South Dakota
Posts: 4,093
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Re: i forgot a step #@&$
The way I see it is better safe than sorry. It sucks being sorry.
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1969 Chevy c20(Miss Hackjob) |
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03-19-2016, 08:57 AM
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#10 | |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,573
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Re: i forgot a step #@&$
Quote:
Cheap insurance if you're doing it over. |
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03-19-2016, 10:44 AM
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#11 |
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Registered User
Join Date: Apr 2010
Location: Jeffersonville, Indiana
Posts: 136
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Re: i forgot a step #@&$
I have never used rtv on those ports, and I've probably assembled 10 big blocks in the lays few years, never had an issue.
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03-19-2016, 08:18 PM
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#12 |
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18 Till I Die
Join Date: Mar 2005
Location: Alberta, Canada
Posts: 1,522
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Re: i forgot a step #@&$
No it will be fine. As long as you put a nice bead on the front and back of the intake(with a bit up on each tab). RTV silicone around those coolant ports is not necessary. Thats what gaskets are for. Even if I saw that in the directions I would not do it. Run it...
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2011 GMC Acadia 1969 GMC BBC LS7 2007 GMC Crew Duramax 1987 Camaro Iroc 350 Tuned Port Injection 42000Km 1987 Chevrolet Silverado 350 TBI 1987 Chevrolet Silverado 350 TBI(yes 2) Take me drunk, I'm too home... 
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03-19-2016, 09:58 PM
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#13 |
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Registered User
Join Date: Oct 2007
Location: Spanaway
Posts: 8,451
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Re: i forgot a step #@&$
I always put the thin coat around the water port but remember too thick and it will just squeeze into the water port.
There are different types of silicone too, I use the the blue stuff for water/coolant, then Grey and Black stuff that is the best oil resistant, works great on the ends of the manifolds. Put a little dab of the grey or black under the bottom ends of the intake gasket at the end rails, then put a thin layer of blue around both sides of the water port of the gasket and put it in place, then lay your 1/4" bead across the ends.
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Mike. Swamp Rat build thread : http://67-72chevytrucks.com/vboard/s...d.php?t=595019 72 3/4T 4X4 4" BDS Lift 33" BFG's |
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03-20-2016, 05:54 PM
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#14 |
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Registered User
Join Date: Aug 2012
Location: nantucket,ma
Posts: 230
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Re: i forgot a step #@&$
i did remember to do that step and it still leaked but the more i drive it i noticed it stopped leaking.
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03-21-2016, 01:46 PM
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#15 |
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Registered User
Join Date: Feb 2003
Location: Santa Ana, CA
Posts: 2,191
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Re: i forgot a step #@&$
Yeah, you might be able to get by without the RTV. But there is a reason they have that step in the instructions. It greatly reduces the odds of a leak. You have no water in the system yet, so pull the manifold, get new gaskets and add the RTV. That is, unless you are feeling lucky
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03-21-2016, 04:42 PM
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#16 |
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Registered User
Join Date: Mar 2015
Location: Utah
Posts: 750
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Re: i forgot a step #@&$
i don't know about you, but knowing that this little amount of time could save you more time and money down the road really would make me want to tear it back down and fix the problem
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