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08-17-2003, 03:50 PM
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Join Date: Sep 2001
Location: Myrtle Beach, SC,
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Cobra Make, Engine: Everett-Morrison 351w assembly STILL in progress
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Coolant from Side pipe????
Well,
351W Rebuilt completed,.... Time for break-in......
After about 15 minutes of running (Temp holding at 165).....
The motor began blowing anti-freeze out the Drivers side Side-Pipe.......Along with white smoke.....
I checked the 5,6,7,8 Plugs...... # 5 was very wet.
So,... pulled intake back off..... (thought it could be intake gasket).... while I was there, I removed the Header and checked head torque.... (thought; head gasket) all was fine.
Looking into the chamber of #5, it was flooded with green coolant. I dried it out and and replaced all the intake gaskets (cafefully) and reassembled everything.
Drained all the old oil and replaced with fresh.
I started the car,...... SAME THING??????
Any ideas or suggestions???
BTY,...... before 1st start up, I had wired the distributor to 302 Firing order....... DUhhhhhhhh
And had a couple back fires, (obviously),... then I figured out what I did..... Could this have caused the problem??
thanks.
RZ
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Ron Zara
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1. "Putting a Chevy Motor in a Shelby Cobra is like CUSSING IN CHURCH!"...... ME
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08-17-2003, 03:54 PM
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Join Date: Dec 2001
Location: Castalia,
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Cobra Make, Engine: EM cobra, 450 inch sbc running a best ET of 9.14..so far..ALL MOTOR...approx 800 horse.............ERA with 482 FE..All Aluminum Engine
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Just because head torque is fine doesn't mean not head gasket...that's my bet
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08-17-2003, 04:06 PM
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I am thinking the problem is something else,... since the coolant was on the TOP side of the Valve, (intake Side)
I am hoping there is not a proble with the head.
RZ
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Ron Zara
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1. "Putting a Chevy Motor in a Shelby Cobra is like CUSSING IN CHURCH!"...... ME
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08-17-2003, 04:10 PM
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Join Date: Dec 2001
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Might be in the head, but if you have a lot of overlap in the cam, it will also push what's left in the cylinder back on top of the valve
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08-17-2003, 04:52 PM
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I have installed a weiand HV water pump, also. I thought with the extra horses, some more flow might be nice. I attached the lower out let to the Thermostat Bypass and the upper hose to the heater outlet on the top of the manifold.
Could this be the cause of my trouble????
Where does the upper hose connect????
RZ
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Ron Zara
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1. "Putting a Chevy Motor in a Shelby Cobra is like CUSSING IN CHURCH!"...... ME
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08-17-2003, 05:40 PM
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Join Date: May 2001
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Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
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Head gasket or cracked (head/block). If you had
everyrthing "magged" prior to assembly and it checked out then it is probably a gasket. Put a bead of silicone around the water passage at the front of the manifold prior to assembly. If you can, prior to putting the manifold back on do a leakdown check on that cylinder (#5) to check the integrety of the head gasket.
The water passage on the intake manifold to the head can sometimes be difficult to seal. Be sure you have the correct gaskets.
Rick
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08-17-2003, 05:46 PM
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Rick,
The Block was fine and running before rebuild. GT-40X aluminum Heads are Brand New. I am using Ford Intake gaskets (Intake to Heads) <<< Intended for these heads.
Fel-Pro Intake to Block.
Fel-pro Head gaskets.
The Passengers side working fine. ??????
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1. "Putting a Chevy Motor in a Shelby Cobra is like CUSSING IN CHURCH!"...... ME
2. "Friends Don't Let Friends Drive Junk"....
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08-17-2003, 07:30 PM
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I agree with Rick - although mine is a big block, I had a similar occurence when coolant leaked past intake gasket into #1 intake port creating lots of white smoke. The fact that engine ran 15 min OK then reached operating temperature when the leak occurred makes me believe you may have a problem in manifold to head fit.
Paul
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08-18-2003, 08:24 AM
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I believe the lower outside head bolts go into the water jacket and need sealant on them.
Roscoe
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08-18-2003, 12:18 PM
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Roscoe,
I used sealant on head bolts you're refering to. I am using a weiand stealth Intake, and Ford GT-40X Heads,.... None of the bolts run through the water jackets. Both the heads & intake use 6 bolts on either side, instead of the 8 like normal 351W set-up.
I have AGAIN removed the intake.... Looks like I am getting a wave (almost a crease) in the gasket on the Drivers side Front....... at the front water passage/#5 intake hole.......
Don't know why this is happening. I am torquing the intake bolts to 17lbs. and using the RED sealant around the water passages (behind & on face of gaskets). The 2nd time I also used copper spray the help adhear the gasket to the head to prevent slippage..... I can't figure it out.. the Passangers side has been fine BOTH times !!!! *?*?*
Also I am not using the regular 351W gaskets.... they are not tall enough for the intake ports on the heads.
Any body Know for certain what gaskets I should be using?? .....this must be the problem.
RZ
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Ron Zara
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1. "Putting a Chevy Motor in a Shelby Cobra is like CUSSING IN CHURCH!"...... ME
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Last edited by ronzara; 08-18-2003 at 12:22 PM..
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08-18-2003, 02:39 PM
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Join Date: Dec 2000
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Cobra Make, Engine: 66 COBRA FE 427 /4SP. (HCS Coupe w/ 408 Stroker and TKO 600 -sold)
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Ron,
I appologize if I missed something, but have you pulled the head off yet and looked at the gasket. I keep reading where you have pulled the intake but did see where you pulled the head off and looked at the head and head gasket.
By the way just because the head is brand new does not mean it can't have a problem with it.
Clois
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08-18-2003, 02:41 PM
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Ron,
I appologize if I missed something, but have you pulled the head off yet and looked at the gasket. I keep reading where you have pulled the intake but didn't see where you pulled the head off and looked at the head and head gasket.
By the way just because the head is brand new does not mean that you can't have a problem with it.
Clois
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08-18-2003, 05:48 PM
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I found the problem,.....
With the intake off AGAIN,...... I dried the intake valve out. I then used a funnel and poured coolant directly into the Coolant runner until it came out the back runner. All the while watching inside the Head's intake Valve hole,.... IT BEGAN TO FILL WITH COOLANT!!!.
I pulled the head off, and I can blow into the hole with the valve closed and hear air escaping into the Coolant chamber!
I guesss theres a crack in there that can't be seem in a visual inspection.
HUMMMMM,........??? Now what?
Is this repairable?????
I don;t believe I caused this to happen, I installed both heads in the EXACT same manner.
Also, would this head gasket be usable again??
RZ
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Ron Zara
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1. "Putting a Chevy Motor in a Shelby Cobra is like CUSSING IN CHURCH!"...... ME
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08-18-2003, 07:46 PM
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Very doubtful you cracked it if you didn't overheat it.
I would check on returning the heads for a new set.
No on reusing the gasket. ( try to get them to replace with the heads.)
Hope it all works out.
Scott
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08-19-2003, 05:54 PM
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I took the head to a performance/Machine shop today for them to inspect. I will post more when I find out exactly what Happened.
But in the mean time:
DOES ANYONE HAVE A SINGLE SVO GT-40X TURBO-SWIRL ALUMINUM HEAD (M-6049-X302) THAT THEY DON"T NEED?????? 
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Ron Zara
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1. "Putting a Chevy Motor in a Shelby Cobra is like CUSSING IN CHURCH!"...... ME
2. "Friends Don't Let Friends Drive Junk"....
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08-21-2003, 05:18 PM
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Well,
BAD NEWS>>>>Got the head back. It had a pin hole in the intake runner.
GOOD NEWS>>> I took the thing to a shop and had the hole opened up and then welded. I put the head back on the Car, and after about 15 minutes of running (constantly checking dipstick for signs of coolant) the coolant in the side pipes finally evaporated and All looks good.
Only thing is I noticed the the upper radiator hose sort of ballooned up pretty good.
Not big, but it WAS SURE UNDER PRESSURE. I think the radiator cap may have caused this. ???????? The system was definately full of water, and the cap was not letting anything into the overflow.
(Water Temp never got above 185).
With the motor running, I could feel coolant moving through both the top and bottom Hoses.
What do you all think? This is a HV water pump.
Also, I took the car for a VERY SHORT test run. and there is a pretty big viberation in the shifter handle at about 2800- 3200 RPMs. What could cause this?? >> C4 Trans.
RZ
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1. "Putting a Chevy Motor in a Shelby Cobra is like CUSSING IN CHURCH!"...... ME
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Last edited by ronzara; 08-21-2003 at 05:21 PM..
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