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Topic: Fubar engine - new pic on 6/11/06!

in Forum: C3 Engines


Fubar engine - new pic on 6/11/06!

Posted: 6/6/06 6:45pm Message 1 of 41
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Huntsville, AL - USA
Joined: 11/15/2003
Posts: 857
Vette(s): 1971 convertible,375 HP 350ci,Muncie 4-speed,Edelbrock aluminum heads and RPM air-gap manifold,HEI distrubiter - old school mechanical tach drive. LOUD side exhaust!

I was driving home from work this evening-  noticed a rattle. I hadn't heard it before this evening. I figured something was loose and banging, so I continued on down the road. The rattle was not dependent on engine speed. I get off the interstate, and I'm 4 miles from the house. All of the sudden, I hear a pop ( at least I think I did, I honestly can't remember now) and the engine dies, while pouring a massive amount of smoke out the passenger side of the car. I gently pull off the road (nice flat spot, plenty of room on the curb). I call the wife and get a number for a tow truck. He says he'll be there in a 20 minutes. It's a nice evening, 70 degrees, sunny - could be worse. I'm sitting in the grass, and several people stop to see if I need help. I talk to one for a few minutes - he own's a 79. Had a guy driving a nice 58 vette stop too! But I'm getting sidetracked. Tow truck arrived - it's a flatbed, woohoo! He gets it up on the truck. As he was pulling it up on the truck, some coolant ran out of the passenger side sidepipe. Surprisingly I didn't start swearing. So we get it to the house, and it's all tucked in the garage. I can't devote a lot of time at this point, so it's going to have to sit until August when I get some time freed up. Guesses on what broke? It won't crank at all. Could I have thrown a rod? I know what a spun bearing sounds like and I never had that telltale clicking sound. Cracked the block? At best a head gasket, but I just don't think I'm that lucky since it won't turn over...

sigh...............

jgoglick38879.3118402778


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Fubar engine - new pic on 6/11/06!

Posted: 6/6/06 6:52pm Message 2 of 41
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

I HATE it when that happens!
Sounds like you may have dropped a valve, and poked a hole in a head, or the block. Whatever it turns out to be, it ain't gonna be good!
Pull all the plugs out before trying to spin the engine over again. If a cylinder is full of water, and you try to spin it over, it can, and most likely will "hydrolock" the engine, bending rods in the process.
I feel your pain...


Joel Adams
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Fubar engine - new pic on 6/11/06!

Posted: 6/6/06 6:57pm Message 3 of 41
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Roseland, NJ - USA
Joined: 12/4/2003
Posts: 966
Vette(s): 1974, 454 with 4 on the floor, matching numbers.
What a bummer  That's been my biggest fear, to have something go wrong with the engine. Have you seen any oil ? Did you check and see if there's any water (coolant) mixed in the oil ? I'm not a mechanic but I do know that oil and water is not a good sign  I'm sure that someone here will be able to help a lot more than me  But I do wish you the best of luck, and hope it's not serious.


Fubar engine - new pic on 6/11/06!

Posted: 6/6/06 7:01pm Message 4 of 41
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North Charleston, SC - USA
Joined: 3/20/2004
Posts: 4176
Vette(s): 1975 L48 AT AC T-top
I'm with Joel on this one. The rattle may have been a valve spring and/or keeper. The valve dropped and damaged the head and/or cylinder hence the coolant making it's way into the exhaust. I see you have a 406c.i. How many miles on it?
Scott
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Fubar engine - new pic on 6/11/06!

Posted: 6/6/06 7:11pm Message 5 of 41
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Huntsville, AL - USA
Joined: 11/15/2003
Posts: 857
Vette(s): 1971 convertible,375 HP 350ci,Muncie 4-speed,Edelbrock aluminum heads and RPM air-gap manifold,HEI distrubiter - old school mechanical tach drive. LOUD side exhaust!

Joel and Scott - thanks for the guidance (yes, bad valve joke intended -get it, valve guide - oh never mind). The previous owner said there was roughly 15K on the engine (car has 95K). I had just changed the oil - no visible coolant in it. I've also been monitoring the coolant, and never saw any oil in it. Of course, I guess there could have been small amounts that I couldn't see. At least I have some direction now. I'll at least try to take the heads off in the next few weeks to see what I can see.




Fubar engine - new pic on 6/11/06!

Posted: 6/6/06 7:38pm Message 6 of 41
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Vette(s): 1982 Collector Edition #3413

O... Snap!!!   

I do wish you the best in fixing the engine.




Fubar engine - new pic on 6/11/06!

Posted: 6/6/06 8:48pm Message 7 of 41
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Huntsville, AL - USA
Joined: 11/15/2003
Posts: 857
Vette(s): 1971 convertible,375 HP 350ci,Muncie 4-speed,Edelbrock aluminum heads and RPM air-gap manifold,HEI distrubiter - old school mechanical tach drive. LOUD side exhaust!

OK, I couldn't leave it alone. I went out to the garage, disconnected the battery, and started taking out the plugs. Took out # 8 first - ok. Took out #6 and  whooo - old faithful. LOTS of coolant comes spewing out. Got the coolant cleaned up and stopped right there.

Yet another long sigh.................

I'll let you guys know what I find whenver I get the heads off.




Fubar engine - new pic on 6/11/06!

Posted: 6/7/06 4:02am Message 8 of 41
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Grand Blanc, MI - USA
Joined: 8/7/2002
Posts: 544
Vette(s): 1979, 350sb, as my kids affectionately call it "shit brown" Corvette purchased in 1996. 84,000+ miles. Not a show car, but I love her just the same.

Not an experience you wanted to follow on the heels of your new purchase here recently.  Sorry to here about the troubles.  Keep us informed as to the cause, repair, rebuild or rebuy, and all the other tribulations along the way.




Fubar engine - new pic on 6/11/06!

Posted: 6/7/06 1:46pm Message 9 of 41
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BINGHAMTON, NY - USA
Joined: 7/19/2003
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That SUUCCKKSS


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Fubar engine - new pic on 6/11/06!

Posted: 6/7/06 4:12pm Message 10 of 41
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Australia
Joined: 5/6/2004
Posts: 535
Vette(s): 71 Coupe Black on Black

Bummer.  Sounds like a crack or head gasket.  Here's hoping it's a head gasket.  BTW don't let it sit too long with all that coolant in the block.  Drain all fluids and spin the engine over to pump as much as you can out.  I'd then be squirting some oil into each plug hole and spin again to make sure you don't get any rusting of your bores.  The head will have to come off in any case so I guess it's a matter of how much time you have.

Just don't let your block sit with coolant in the bore!  I'm going through that exact exercise right now from someone (PO) who did.  See my post on "Heart Surgery"




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