Engine inspection
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* '''[http://www.crankshaftcoalition.com/wiki/Valve_train_points_to_check HERE]''' is a list of valve train points to check, including the valve train geometry. This doesn't require any disassembly other than the valve cover to be removed and should be checked ''before'' tearing the engine down. | * '''[http://www.crankshaftcoalition.com/wiki/Valve_train_points_to_check HERE]''' is a list of valve train points to check, including the valve train geometry. This doesn't require any disassembly other than the valve cover to be removed and should be checked ''before'' tearing the engine down. | ||
* Condition of the spark plugs (oil consumption, correct heat range and air/fuel ratio) | * Condition of the spark plugs (oil consumption, correct heat range and air/fuel ratio) | ||
| − | ** What you also want to see is if the plug electrode/ | + | ** What you also want to see is if the plug electrode/porcelain is fouled or discolored more on one side of the electrode than the other. If they are, the next thing will be to determine what valve the fouled side of the plug is facing. The valve sequence on a SBC ("E" = exhaust valve, "I" = intake valve): |
| + | ***Driver side: E '''1''' I I '''3''' E E '''5''' I I '''7''' E''' | ||
| + | ***Passenger side: E '''2''' I I '''4''' E E '''6''' I I '''8''' E''' | ||
| + | **A spark plug will sit where every numeral is. So looking at the sequence, you can see if the plug for cylinder #1 has more deposits on the left side when it's fully tightened into the head, that the deposits are coming from the exhaust guide.<br>If there is no "worse" side to the plugs and they look to be coloring equally, that's good and nothing more need be done in that regard.<br>Other valve arrangements can be found [http://www.crankshaftcoalition.com/wiki/Valve_arrangement_of_various_cylinder_heads '''here'''].<br> A description of how to "index" the plugs can be seen [http://www.fordpowerms.com/index.php/topic,132.msg254.html#msg254 '''here''']. All that needs to be done in this case, is to mark the plug when it's tight in the head so the position of the deposits can be determined to be towards the exhaust or intake. Most often if the plugs are fouled worse on just one side, it will be towards the exhaust. | ||
* Timing set phasing (cam advanced or retarded) and alignment | * Timing set phasing (cam advanced or retarded) and alignment | ||
* Piston deck height (important for calculating the compression ratio and for setting the correct quench distance) | * Piston deck height (important for calculating the compression ratio and for setting the correct quench distance) | ||
* Cam specs/cam part number from the end of the cam | * Cam specs/cam part number from the end of the cam | ||
* Condition of the lifters and cam lobes | * Condition of the lifters and cam lobes | ||
| − | * Bearing condition and oil clearances | + | * Bearing condition and oil clearances. See '''[http://www.bobistheoilguy.com/bearingwear/bearingwearanalysis.htm photos and descriptions of bearing wear]''' for more. |
* Rod bearing clearance at the crank fillet | * Rod bearing clearance at the crank fillet | ||
* Crank end play | * Crank end play | ||
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