Engine inspection
(Incorporate text from "Engine basic condition - how to check" article) |
(→Some points to check:: Add text, links) |
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==Some points to check:== | ==Some points to check:== | ||
| − | + | * '''[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) | |
| − | + | ** What you also want to see is if the plug electrode/porcelene are 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 is:<br>E ¹ I I ³ E E ⁵ I I ⁷ E <br>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 | |
| − | + | * 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 | |
| − | + | * Condition of the lifters and cam lobes | |
| − | + | * Bearing condition and oil clearances | |
| − | + | * Rod bearing clearance at the crank fillet | |
| − | + | * Crank end play | |
| − | + | * Oil pick up distance to the bottom of the pan | |
| − | + | * Attachment of the pick up to the oil pump | |
| − | + | * Cam to rod and rod/crank to block clearances, if a stroker | |
| − | + | * Ring end gap | |
| − | + | * Piston to bore clearance | |
| − | + | * Crosshatch pattern in the cylinders, general bore condition | |
| − | + | * Wear patterns on the pistons | |
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{{youcanedit}} | {{youcanedit}} | ||
[[Category:Engine]] | [[Category:Engine]] | ||
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