Re: Has anyone experienced Core Shift????
[Re: JohnRR]
#1631522
06/23/14 08:47 PM
06/23/14 08:47 PM
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Joined: Jul 2007
Posts: 291 St. Louis
Imrare
OP
enthusiast
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OP
enthusiast
Joined: Jul 2007
Posts: 291
St. Louis
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Quote:
Easy enough , and not super expensive to figure out , get another pair of heads , or at least replace one... BUT I'm pee in the punch, thin cylinders on that bank COULd be putting more heat in the coolant on that side and causing it to run hotter , or the coolant is somehow being restricted.
One way to figure out if it is the head that is causing it , swapp the heads side to side and see if the heat moves. I'll supply the head gaskets if your're up for the challenge. If you lived closer to NH I'd do the work.
This is getting interesting.
JohnRR, that is an excellent idea...that is exactly what I will do. Obviously if the heat moves to the Passenger side, we've found it, if the Driver's side remains hot, more than likely a "block problem". Since the engine compartment is "all detailed" up, I am going to wait until after the Mopar Nationals (August) to do this. I should be able to remove the heads in one weekend and re-assemble it the next (okay I'm slow). The shop that rebuilt the engine wants me to try a new Carb before I do anything else, he doesn't think it is the head. I told him I would try a new carb but that I thought it was unlikely that an improper fuel mixture would only affect one side of the engine. Do you agree?
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Re: Has anyone experienced Core Shift????
[Re: Imrare]
#1631523
06/23/14 09:14 PM
06/23/14 09:14 PM
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Joined: Dec 2008
Posts: 2,782 USA
JoesMopar
master
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master
Joined: Dec 2008
Posts: 2,782
USA
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Quote:
Quote:
Easy enough , and not super expensive to figure out , get another pair of heads , or at least replace one... BUT I'm pee in the punch, thin cylinders on that bank COULd be putting more heat in the coolant on that side and causing it to run hotter , or the coolant is somehow being restricted.
One way to figure out if it is the head that is causing it , swapp the heads side to side and see if the heat moves. I'll supply the head gaskets if your're up for the challenge. If you lived closer to NH I'd do the work.
This is getting interesting.
JohnRR, that is an excellent idea...that is exactly what I will do. Obviously if the heat moves to the Passenger side, we've found it, if the Driver's side remains hot, more than likely a "block problem". Since the engine compartment is "all detailed" up, I am going to wait until after the Mopar Nationals (August) to do this. I should be able to remove the heads in one weekend and re-assemble it the next (okay I'm slow). The shop that rebuilt the engine wants me to try a new Carb before I do anything else, he doesn't think it is the head. I told him I would try a new carb but that I thought it was unlikely that an improper fuel mixture would only affect one side of the engine. Do you agree?
You've got to be kidding me...I think JohnRR is being facetious...
As far as improper fuel mixture..I don't know, unless you have one side of the idle mixture screws really leaned out over the other...and even then I don't know if that's possible. Your car would be running off the idle circuit when this is happening so I guess it's of interest. You can set it pretty easy with a vacuum gauge.
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Re: Has anyone experienced Core Shift????
[Re: Imrare]
#1631525
06/23/14 10:25 PM
06/23/14 10:25 PM
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Joined: Mar 2005
Posts: 1,406 New Jersey, USA
yella71
pro stock
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pro stock
Joined: Mar 2005
Posts: 1,406
New Jersey, USA
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Its not core shift or tune up or any of that stuff. the engine is assembled with something wrong. pull the heads and check the gaskets and the water pump. I think they put the head gaskets on wrong. core shift my a$$
71 challenger convertable, 64 sport fury 383 ci with factory air
99 sebring convertable
89 CTD pup
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Re: Has anyone experienced Core Shift????
[Re: JoesMopar]
#1631527
06/24/14 11:29 AM
06/24/14 11:29 AM
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Joined: Jan 2003
Posts: 75,098 A Banana Republic near you.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,098
A Banana Republic near you.
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Quote:
Quote:
Quote:
Easy enough , and not super expensive to figure out , get another pair of heads , or at least replace one... BUT I'm pee in the punch, thin cylinders on that bank COULd be putting more heat in the coolant on that side and causing it to run hotter , or the coolant is somehow being restricted.
One way to figure out if it is the head that is causing it , swapp the heads side to side and see if the heat moves. I'll supply the head gaskets if your're up for the challenge. If you lived closer to NH I'd do the work.
This is getting interesting.
JohnRR, that is an excellent idea...that is exactly what I will do. Obviously if the heat moves to the Passenger side, we've found it, if the Driver's side remains hot, more than likely a "block problem". Since the engine compartment is "all detailed" up, I am going to wait until after the Mopar Nationals (August) to do this. I should be able to remove the heads in one weekend and re-assemble it the next (okay I'm slow). The shop that rebuilt the engine wants me to try a new Carb before I do anything else, he doesn't think it is the head. I told him I would try a new carb but that I thought it was unlikely that an improper fuel mixture would only affect one side of the engine. Do you agree?
You've got to be kidding me...I think JohnRR is being facetious...
As far as improper fuel mixture..I don't know, unless you have one side of the idle mixture screws really leaned out over the other...and even then I don't know if that's possible. Your car would be running off the idle circuit when this is happening so I guess it's of interest. You can set it pretty easy with a vacuum gauge.
No I'm completely serious.
But trying a carb is not a bad idea , though 2 cylinders on each bank are fed by half the carb... BUT the distribution of that stock intake leaves a lot to be desired.
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Re: Has anyone experienced Core Shift????
[Re: JohnRR]
#1631529
06/24/14 11:56 AM
06/24/14 11:56 AM
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Joined: Feb 2005
Posts: 28,312 Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
Quote:
Quote:
Quote:
Easy enough , and not super expensive to figure out , get another pair of heads , or at least replace one... BUT I'm pee in the punch, thin cylinders on that bank COULd be putting more heat in the coolant on that side and causing it to run hotter , or the coolant is somehow being restricted.
One way to figure out if it is the head that is causing it , swapp the heads side to side and see if the heat moves. I'll supply the head gaskets if your're up for the challenge. If you lived closer to NH I'd do the work.
This is getting interesting.
JohnRR, that is an excellent idea...that is exactly what I will do. Obviously if the heat moves to the Passenger side, we've found it, if the Driver's side remains hot, more than likely a "block problem". Since the engine compartment is "all detailed" up, I am going to wait until after the Mopar Nationals (August) to do this. I should be able to remove the heads in one weekend and re-assemble it the next (okay I'm slow). The shop that rebuilt the engine wants me to try a new Carb before I do anything else, he doesn't think it is the head. I told him I would try a new carb but that I thought it was unlikely that an improper fuel mixture would only affect one side of the engine. Do you agree?
You've got to be kidding me...I think JohnRR is being facetious...
As far as improper fuel mixture..I don't know, unless you have one side of the idle mixture screws really leaned out over the other...and even then I don't know if that's possible. Your car would be running off the idle circuit when this is happening so I guess it's of interest. You can set it pretty easy with a vacuum gauge.
No I'm completely serious.
But trying a carb is not a bad idea , though 2 cylinders on each bank are fed by half the carb... BUT the distribution of that stock intake leaves a lot to be desired.
For the record, I betting it's not the heads and not the block, no matter how thin the sleeves are.
The engine builder knows the engine and the person using it and what it's used for. I can't believe how no one wants to hear what he has said or suggested.
You would think jetting up is easier than swapping heads just to see if the engine builder has a clue??
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Re: Has anyone experienced Core Shift????
[Re: Challenger 1]
#1631530
06/24/14 01:31 PM
06/24/14 01:31 PM
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Joined: Jan 2003
Posts: 75,098 A Banana Republic near you.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,098
A Banana Republic near you.
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Quote:
You would think jetting up is easier than swapping heads just to see if the engine builder has a clue??
Somewhere along the line in these many threads the carb change has been suggested , a few times , but the OP is STUCK ON FACTORY STOCK and poo poo'd a carb change , or the carb , being the problem.
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Re: Has anyone experienced Core Shift????
[Re: JohnRR]
#1631531
06/24/14 01:44 PM
06/24/14 01:44 PM
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Joined: Feb 2005
Posts: 28,312 Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
Quote:
You would think jetting up is easier than swapping heads just to see if the engine builder has a clue??
Somewhere along the line in these many threads the carb change has been suggested , a few times , but the OP is STUCK ON FACTORY STOCK and poo poo'd a carb change , or the carb , being the problem.
I'm pretty sure carburetors are more mysterious today than fuel injection was us 30 years ago.
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Re: Has anyone experienced Core Shift????
[Re: JohnRR]
#1631532
06/24/14 01:50 PM
06/24/14 01:50 PM
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Joined: Feb 2003
Posts: 12,675 Columbia, CT
moper
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 12,675
Columbia, CT
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I think the head swap is a good exercise. It's not invasive and can be done much quicker than two days unless you're only working a few hours each day on it. In terms of core shift - it exists in almost everything. heads, intakes, blocks, water pump housings... It doesn;t make somrething fatal but I've failed blocks because one entire side was shifted away from the major thrust making the pin axis the thickes dimension... The other side was fine. Also - a bearing issue can cause too much heat - especailly something like bearings not chamfered enough for some of the stroker cranks. Rings can cause exces heat in the oil and the iron. I'd think subsequent rebuilds and refreshens would have addressed all of those. I'll also throw this out... I had a Dart with a big block that ran great. I did a cam swap and it began to have an overheating problem. Enough that I traded it after getting frustrated with it. It took the new owner about an hour to find it. A field mouse had gotten into the lower radiator tank during the cam swap (inside my shop). It did not escape before the radiator was reinstalled. That would intermittently plug the water outlet from the rad, causing the car to overheat after some miles of driving.
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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Re: Has anyone experienced Core Shift????
[Re: BDW]
#1631535
06/24/14 09:24 PM
06/24/14 09:24 PM
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Joined: Jul 2007
Posts: 291 St. Louis
Imrare
OP
enthusiast
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OP
enthusiast
Joined: Jul 2007
Posts: 291
St. Louis
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