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Author Topic: 5th with antifreez gone is a Dead Cock Roach  (Read 2399 times)

Steve

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5th with antifreez gone is a Dead Cock Roach
« on: March 15, 2009, 02:46:08 PM »

Some of you know I have an 86 5th Ave.
 
I finally got to work on the engine today.  It was assumed it has a bad head gasket.  Now I don't know.  What ever it is, it sucks the rad down pretty darned fast.  It's not going into the crankcase like Bobs.  I am wondering now if a head is cracked and it's just going out the tail pipe.  Take a look at the plugs and you'll see why.  None of them are clean from steaming in the cylinder.
 
Before I dig deeper into this, I just want to throw this out on the floor  Pictures tell allot.
 


  #8      #6         #4           #2                     #7                   #5                     #3             #10
 
 





POLARACO2009-04-02 18:07:37
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Ken

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5th with antifreez gone is a Dead Cock Roach
« Reply #1 on: March 15, 2009, 04:00:27 PM »


I would look somewhere else, like the thermostat housing, hoses, radiator and the heater, 'cause I'm not seeing anything that would cause me to worry with those pictures....unless your timing chain cover has a hole eaten into it too

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Steve

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5th with antifreez gone is a Dead Cock Roach
« Reply #2 on: March 15, 2009, 04:04:44 PM »

I said, I am not getting any antifreeze in the oil.
 
No extrernal leaks either.  That's out
 
I got the exhaust manifolds back so I could peer into the holes.  No evidence there either.  But the staining color of the water is whitish.  That indicates exhaust gases.  But the car didn't over heat.  I could pour a gallon of antifreeze in there and it would be gone in 10 minutes. 
 
This thing is kicking my butt
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Stan Paralikis

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5th with antifreez gone is a Dead Cock Roach
« Reply #3 on: March 15, 2009, 04:51:27 PM »


[/QUOTE]

We all know LAheads are notorious for cracking.
Gotta go with the odds if the obvious doesn't show...

Leaburn Patey

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5th with antifreez gone is a Dead Cock Roach
« Reply #4 on: March 15, 2009, 05:04:54 PM »

Cracked head or bad heater core??
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Ken

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5th with antifreez gone is a Dead Cock Roach
« Reply #5 on: March 15, 2009, 05:10:37 PM »

Leak from the exhaust manifold mounting studs at the ends of the heads, since they DO go into the coolant jacket...that's my guess

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Stitcherbob

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5th with antifreez gone is a Dead Cock Roach
« Reply #6 on: March 15, 2009, 05:33:55 PM »

maybe his new transmission is full of antifreeze now

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glen cyr

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5th with antifreez gone is a Dead Cock Roach
« Reply #7 on: March 15, 2009, 05:38:37 PM »

Here's a great article on the 302 and 345 heads!.  http://www.1962to1965mopar.ornocar.org/ml-pitchercastingheadarticle.html  They are notorious for cracking and finding a good set is hard to do! If it's cracked on the underside of the exhaust valve,..it will evaporate that anti-freeze and you're plug color will not change because it's down wind so to speak!  Yea,BOB,...I've seen a rad fail before and the anti-freeze goes in the tranny from the cooler lines!owatajrkiam2009-03-15 21:40:37
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Steve

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5th with antifreez gone is a Dead Cock Roach
« Reply #8 on: March 15, 2009, 06:37:14 PM »

Hah Hah. .  I already looked there.  It would have been in there when the trans was rebuilt too.  Remember, this thing has been doing this since I got it.
 
Chris
 
Believe it or not, I got lucky.  Leaburn and I stripped an 89 last summer which had a good set of heads on it.  Just incase, I had those heads done.  So they are on deck, ready to install.  Now all I have to do is get the exhasut manifolds off.  Hardest part of the job.  My guy Magnafluxed them fro me too
 
Thanks for those articles.  I'll be readin them suckers.
 
BTW, I managed to get the exhaust manifolds back enough to see in the ports.  They all look the same.  Mannn-o man  I guess I'll just have to get further into it.
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Steve

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5th with antifreez gone is a Dead Cock Roach
« Reply #9 on: March 15, 2009, 06:59:09 PM »

Quote from: CBarge
Cracked head or bad heater core??
 
It's not a heater core. . .After 3 gallons of antifreeze in about 30 minutes of total running, you would think it would show somewhere
 
When I took the intake off, it was bone dry.  I have been only running this for minutes at a time.
 
I'll find it.  My original instancts said bad gasket or bad head.  That's why I took the heads off a good running engine
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Leaburn Patey

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5th with antifreez gone is a Dead Cock Roach
« Reply #10 on: March 15, 2009, 08:06:46 PM »

Quote from: POLARACO
 
You mean WE  did,LOL!!
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Stitcherbob

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5th with antifreez gone is a Dead Cock Roach
« Reply #11 on: March 15, 2009, 09:17:48 PM »

Here's a question....I've seen the huge white clouds from combusting glycol antifreeze....but mostly on older cars or diesel trucks. And usually that's on the highway or under acceleration. But will a modern catalytic convertor heat up enough to burn glycol with no white smoke? How about if the car isn't accelerating? Just idling or around town, as Steve's 5th Ave hasn't really been used to it's full potential yet...

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Steve

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5th with antifreez gone is a Dead Cock Roach
« Reply #12 on: March 15, 2009, 09:46:15 PM »

Quote from: CBarge
Quote from: POLARACO
 
 
Who made the decision?
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Steve

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5th with antifreez gone is a Dead Cock Roach
« Reply #13 on: March 15, 2009, 09:48:59 PM »

Quote from: stitcherbob
Here's a question....I've seen the huge white clouds from combusting glycol antifreeze....but mostly on older cars or diesel trucks. And usually that's on the highway or under acceleration. But will a modern catalytic convertor heat up enough to burn glycol with no white smoke? How about if the car isn't accelerating? Just idling or around town, as Steve's 5th Ave hasn't really been used to it's full potential yet...
 
If a diesel is belching white smoke, it has a problem
 
The cats get up to 1400 degrees some times, so I would have to say yes.  But, on cold days, you would see an extraudinary amount of steam from the tail pipe.  I think
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glen cyr

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5th with antifreez gone is a Dead Cock Roach
« Reply #14 on: March 16, 2009, 12:28:01 PM »

So we've basically narrowed it down to going out the exhaust if it ain't on the ground,oil pan,trans,etc. I'm pretty sure that cat will evaporate every last drop of glycol!. It would be nice to nail it down to which bank,...or i guess if you're doing one,ya' might as well do both with all fresh gaskets,..EH! 



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