Differences

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--- techtalk:ref:engmech02e [2019/03/10 03:26] – created hippysmack
+++ techtalk:ref:engmech02e [2021/08/04 19:12] (current) – [Removing / Installing Piston Rings] hippysmack
@@ Line 2: / Line 2: @@
 ====== REF: Engine Mechanicals - Sub-02E ======
 ====== Removing / Installing Piston Rings ======
+[[techtalk:ref:engmech02c|Click Here]] for ring gap orientation when installing the pistons back into the cylinders. \\
+If your piston engine kit came with instructions, always follow those (if you intend on retaining a warranty). \\
+**Removal**: \\
+Some just peel the top 2 rings off by hand the same as removing the oil rings. \\
+Older rings were notorious for breaking when one end was spread too far vertically. \\
+This still can happen on modern rings but they can be carefully wound on / off by hand. \\
+A piston ring spreader is used below. \\
+The ring spreader hooks both ends of the ring and spreads it apart making the inside diameter wider than the piston. \\
+Then you simply center the widened ring around the piston and lift it up and off. \\
+**Caution**: only spread the ring just enough to remove / install the ring. ((photos by Hippysmack)) \\
 |{{:techtalk:ref:tools:piston_ring_spreader_1_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:engmech:removing_piston_rings_1_by_hippysmack.jpg?direct&300|}}|
+The top 2 compression rings come off first and exactly the same way. \\
 |{{:techtalk:ref:engmech:removing_piston_rings_2_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:engmech:removing_piston_rings_3_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:engmech:removing_piston_rings_4_by_hippysmack.jpg?direct&300|}}|
+The oil rings are usually removed by hand. \\
+Locate the split on the top oil ring, hold pressure against the opposite end so it doesn't move. \\
+Carefully lift out and up at the same time on one end and try to raise that end at least to the top of the piston before letting go. \\
+(so you don't scratch the side of the piston) \\
+Then push out and around at the same time until the ring is out of the groove. ((photos by Hippysmack)) \\
 |{{:techtalk:ref:engmech:removing_piston_rings_5_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:engmech:removing_piston_rings_6_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:engmech:removing_piston_rings_7_by_hippysmack.jpg?direct&300|}}|
+Locate the split on the bottom oil ring. ((photos by Hippysmack)) \\
 |{{:techtalk:ref:engmech:removing_piston_rings_8_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:engmech:removing_piston_rings_9_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:engmech:removing_piston_rings_10_by_hippysmack.jpg?direct&300|}}|
+Remove the bottom oil ring in the same fashion as the top oil ring. \\
+The expander ring comes off the same way. ((photos by Hippysmack)) \\
 |{{:techtalk:ref:engmech:removing_piston_rings_11_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:engmech:removing_piston_rings_12_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:engmech:removing_piston_rings_13_by_hippysmack.jpg?direct&300|}}|
+**Installation**: \\
+Installation is in reverse starting with the expander ring. \\
+The clearance is tighter if you install the top / bottom oil rings first and it just wastes time having to take them back off to get the expander ring on. \\

Trace: • EVO: Engine Mechanicals - Sub-04E • EVO: Engine Mechanicals - Sub-09E • EVO: Suspension - Sub-01C

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