ShadowsPapa
Well-Known Member
- First Name
- Bill
- Joined
- Oct 12, 2019
- Threads
- 247
- Messages
- 40,449
- Reaction score
- 53,885
- Location
- Runnells, Iowa
- Vehicle(s)
- '25 JTMX, '23 JLU 4xe, '82 SX4, '73 Javelin
- Occupation
- Retired auto mechanic, frmr gov't ntwrk security admin
- Vehicle Showcase
- 3
Engines are designed and made by humans. All of the parts are designed and made by humans. Even the robots used are designed and made and programmed by humans.
Over 20,000,000 of the Pentastar 3.6 engines out there, now and then one is likely to blow a gasket.
As we say here "@#$% happens" (insert whatever crude word you want in there)
It's not common, but geesh, out of the millions of these made to assume none of them will EVER blow a head gasket, regardless of care? Not reasonable by any stretch of the imagination. Someone, somewhere, at some time, may spin a rod bearing, or main bearing, break a piston, blow a head gasket, crack a block or head, break a valve, have an oil leak, it's going to happen. 20,000,000 (20 MILLION) of these, someone is going to have "bad luck".
In manufacturing there's also a "stackup of tolerances" where things may be in the correct "range", within that 0 plus or minus .1 and the next part is on the other edge, and you have a looser fit than the next guy.
It's like poker - once in a while by pure chance you get the bad hand and nothing you can do will win (other than being a great bluffer)
To make things worse - the desire, and/or tendency, of Jeep owners to want to keep their engines running under 3,000 RPM can cause issues- increased cylinder pressures and heat, forcing them to run below their peak RPM area, that generates more pressures on the heads and gaskets (stop trying to force low RPM! Let it run as designed)
So if taking care of an engine means babying it and trying to force the RPM to stay low, even when things are loaded, that's actually on the edge of abuse.
Over 20,000,000 of the Pentastar 3.6 engines out there, now and then one is likely to blow a gasket.
As we say here "@#$% happens" (insert whatever crude word you want in there)
It's not common, but geesh, out of the millions of these made to assume none of them will EVER blow a head gasket, regardless of care? Not reasonable by any stretch of the imagination. Someone, somewhere, at some time, may spin a rod bearing, or main bearing, break a piston, blow a head gasket, crack a block or head, break a valve, have an oil leak, it's going to happen. 20,000,000 (20 MILLION) of these, someone is going to have "bad luck".
In manufacturing there's also a "stackup of tolerances" where things may be in the correct "range", within that 0 plus or minus .1 and the next part is on the other edge, and you have a looser fit than the next guy.
It's like poker - once in a while by pure chance you get the bad hand and nothing you can do will win (other than being a great bluffer)
To make things worse - the desire, and/or tendency, of Jeep owners to want to keep their engines running under 3,000 RPM can cause issues- increased cylinder pressures and heat, forcing them to run below their peak RPM area, that generates more pressures on the heads and gaskets (stop trying to force low RPM! Let it run as designed)
So if taking care of an engine means babying it and trying to force the RPM to stay low, even when things are loaded, that's actually on the edge of abuse.
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