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#1
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Leaking intake at water crossover ports
I Have an edelbrock Torker 2 intake with Ported Kauffman D-Ports, my old intake gaskets were leaking a bit by the front water ports so I figured I would throw some new ones on for the season.
I took the intake off and put on one of the new sets of intake gaskets. I put black RTV around the front crossover holes to help the gasket line up. Did this about a week ago; When I came to look at the car today there was puddles of coolant on top of the intake..seems like it's leaking bad from the front bolts, especially driver side..is this gasket supposed to be porous? It seems the gaskets are both wet. I haven't even ran the car since putting the new gaskets on and this is what happened. My engine guy at SD says these are the only gaskets that accomodate the large D port opening for the CNC heads.... as you can see in the pictures the gasket is already soaked. any suggestions? this is really grinding my gears as to why its leaking like crazy! I don't know how to attach photos from google drive so here are the links https://drive.google.com/file/d/1L3E...ew?usp=sharing https://drive.google.com/file/d/1Kxo...ew?usp=sharing
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The Educated Fool Last edited by andrewT; 05-26-2021 at 09:56 PM. Reason: pictures |
#2
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WHAT GASKETS DID YOU USE??? WHAT BRAND AND PART NUMBER?
RTV Silicone is a mistake. Use a real gasket sealer next time. Gasgacinch, High Tack, Indian Head, Copper Coat, Hylomar, Permatex 1, 2, or 3, or any one of a dozen others, but NOT RTV SILICONE. Bolt threads cleaned of rust, and torqued properly, in sequence shown in service manual? Manifold NOT warped or corroded? |
#3
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If as you say, your seeing signs of coolant on top of the crossover then it’s not coming from poor sealing intake gaskets, as those leaks always end up pooled in the end lip sump of the valley pan cover!
It’s coming from 3 other possible things , the thermostat gasket, the upper hose, or a sender fitting , or I have even had the senders themselves leak. Also look closely at the Thermostat bolt holes , as I have seem them cracked out vertically .
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
#4
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Quote:
https://forums.maxperformanceinc.com...ater+crossover Hence the RTV...Manifold is good, brand new, no corrosion. I am using these gaskets as seen in the picture links "Thermoseal RG-N100" ...SD Performance says these are the proper gaskets for my CNC matched intake and heads I am running purchased from him. He says he gets them from Tin Indian performance. When I google that name/number on the gasket nothing comes up for specs so I called Tin Indian and haven't heard back. SD says he doesn't like them much but that its really the only option for this combination. I tightened the bolts in sequence based on the edelbrock torker 2 installation manual (which says centre outwards) but seeing Tom Vaught's post in the thread I linked he suggests a different sequence (back to front, to middle). Quote:
All those other things you mention are good...There is literally so much coolant I can see the trail out of the crossover section as it has now stained the intake. Car has never been run. Upper hose, senders, etc all good but will double check today. Thanks Gents
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The Educated Fool |
#5
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Get rid of silicone. use some Permatex # 2 and be done with it.
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#6
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Quote:
although there are other options for gasket sealers... i've used ultra black in that area of intakes & many other places with zero leaks or issues on 4 or 5 different engines for decades. permatex states ultra black/grey rtv can be used as a dressing on most gaskets with out any problems... https://www.permatex.com/wp-content/.../tds/22072.pdf if its leaking that bad before even running the engine, its not the rtv's fault. something else is going on to cause the leak. hope you figure it out. |
#7
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Long shot but have you measured the bolts to make sure they aren’t bottoming-out before clamping down the crossover?
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Will Rivera '69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears ‘66 Lemans, 455, KRE D-Ports, TH350, 12 bolt 3.90 gears '69 LeMans Vert, 350, #47 heads: work in progress |
#8
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Good point in post #7 here!
I have had that issue myself and most times a two 5 cent washers takes care of it until that other correct bolt is found or you buy another.
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
#9
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Quote:
Quote:
https://klinger-thermoseal.com/produ...moseal-rg-n100 Quote:
Are the gaskets even thick enough? They look mighty thin on my monitor. The only thickness mentioned by the manufacturer is 0.031; but that doesn't mean there aren't other thicknesses available. Put a straightedge on each gasket surface of the manifold, look for warping. Trial-fit on the engine, poke a feeler gauge between manifold and head in several places to verify fitment. Last edited by Schurkey; 05-27-2021 at 12:05 PM. |
#10
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You should have at least a .060 gasket in there. I just had some spacers made for my shaved down intake to fit. But wish someone would make ones like mine with an embedded seal and they would be reusable.
Maybe go get some 1/16 aluminum and make up a few small sections for crossover and seal it up with a proper sealer and ditch the paper gasket at the front.
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Illinois Outlaw Gassers 6.27@107 9.97@131 |
#11
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Quote:
You will always have a water leak if you try to seal that "o-ring" between the intake and timing cover later on. Seal that "o-ring" between the intake and timing cover FIRST Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
#12
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What Tom said.
The type of sealant your using is not the problem. Make sure the manifold dry fits correctly with your heads, block and valley cover then install as per Tom V. |
The Following User Says Thank You to firechicken For This Useful Post: | ||
#13
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Quote:
Rtv works just fine around the water ports. Been purposely using it around intake water ports for many years. No issues. If you have any pitting it'll be the only thing that works well. DON'T use it around the intake ports it doesn't play well with gasoline.
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'65 Tempest 467 3650# 11.30@120.31 |
The Following User Says Thank You to Scott65 For This Useful Post: | ||
#14
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Only problem I have ever had with RTV was at the track. It takes time to cure. P #2 does not harden so there is no cure time.
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#15
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Thanks ALL!
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The Educated Fool |
#16
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What is your port size? There are many intake gaskets to choose from?
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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2 373 gears 3200 Continental Convertor best et 10.679/127.5/1.533 60ft 308 gears best et 10.76/125.64/1.5471 |
#17
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I had a chronic coolant leak at the crossover using regular gaskets with an aftermarket crossover no matter what sealer I tried. These Teflon gaskets fixed it and are reusable. They are thicker than most of the gaskets on the market.
http://www.tinindianperformance.com/...%20gaskets.htm
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68 GTO,3860# Stock Original 400/M-20 Muncie,3.55’s 13.86 @ 100 Old combo: 462 10.75 CR,,SD 330CFM Round Port E's,Old Faithful cam,Jim Hand Continental,3.42's. 1968 Pontiac GTO : 11.114 @ 120.130 MPH New combo: 517 MR-1,10.8 CR,SD 350CFM E's,QFT 950/Northwind,246/252 HR,9.5” 4000 stall,3.42's 636HP/654TQ 1.452 10.603 @ 125.09 http://www.dragtimes.com/Pontiac-GTO...lip-31594.html |
#18
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I did not read thru every reply to the OP here, but one other thing I recall I had happen which kept a good intake gasket seal from taking place was with a milled head and block combo.
The total amount removed combined with the gaskets I used had the bottom of the intake flange sitting on the valley pan such that I had to grind like ,030” off each passenger and drivers side lip of the pan to get a seal. Sorry for going thru all of this if it was covered in a previous reply!
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
The Following User Says Thank You to steve25 For This Useful Post: | ||
#19
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Quote:
thank you
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The Educated Fool |
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