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Project Honda Civic EJ EK cylinder head B18c1 engine block port flow port and polish how to measure high compression long rod

 Project Honda Civic EJ:  The Engine Build Begins!

by Chuck Johnson

Photography by Joe Lu

Here at MotoIQ headquarters, we lack any kind of self-control and discipline.  When we first conceptualized Project Civic, we planned to keep it simple with only a few basic modifications. However, if you're foolish enough to involve me in a car build of any kind, you're simply asking for trouble.  Poor Annie Sam, I'm always taking things too far.  Blown head gasket?  Sure, we'll just replace that sucker and while we’re in there, we'll take care of a few other things too.  [Insert dastardly, evil laugh here.]  And so the engine build begins… 

 
Project Honda Civic EJ EK cylinder head B18c1 engine block port flow port and polish how to measure high compression long rod
 
After removing the cylinder head and the head gasket, the results of Annie's literal "hot laps" at Button Willow became quickly apparent.  Two tell tale scorch marks led from the combustion chambers of cylinders two and three over to the adjacent coolant passage.  This confirmed the suspicions we had about the incessant air bubbles found in the coolant as well as the lack of coolant itself during our baseline testing at Button Willow Raceway.         
 
Project Honda Civic EJ EK cylinder head B18c1 engine block port flow port and polish how to measure high compression long rod
 
This type of damage to the head gasket's elastomer coating is typical when over heating distorts the cylinder head or block surface.  The loss in micro sealing causes combustion pressure to pressurize the cooling system and also reduces performance when coolant is pulled through the failed area by the vacuum of the intake stroke.  
 
Project Honda Civic EJ EK cylinder head B18c1 engine block port flow port and polish how to measure high compression long rod flatness inspection
 
To further assess the damage and determine what kind of shenanigans awaited us, we inspected the cylinder head for warping.  This can be done using a "precision parallel" or a "machinist straight," both of which have a high degree of straightness and flatness.  Setting our machinist straight down on the deck of the cylinder head, we used feeler gauges of various thicknesses to inspect the deck for flatness.  We repeated this several times in a "X" pattern and then around the perimeter of the deck to determine that the cylinder head was warped by over .005".  This was well over the flatness limit of .002" specified in the FSM.  

 

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Comments
OMG Its Weasel
OMG Its Weasellink
Sunday, September 18, 2011 6:43 PM
Ah, the B-series. I miss mine sometimes.
This project brings back all sorts of old memories.
Looking forward to the rest of the series.
GCMBob
GCMBoblink
Monday, September 19, 2011 3:32 AM
omg that shop is so pretty...
Marillionado
Marillionadolink
Monday, September 19, 2011 6:52 AM
This is what I call painstaiking attention to detail. Good man!

Can't wait to read the rest of the story. Also it was good to go back to the beautifull work done on the head by Port Flow. Those pics are glorious.
Der Bruce
Der Brucelink
Monday, September 19, 2011 1:15 PM
I'd say things are a little quieter than the Skunk2 controversy! I'm looking forward to when high compression, long rod conceptualization becomes realization :)
willscarcast
willscarcastlink
Monday, September 19, 2011 1:34 PM
sweet stuff
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