Another quick check is to inspect the spark plugs, which in this case didn't look that bad. Severely oil-fouled plugs indicate bad rings or valve seals and guides, while water on the plugs warns of head gasket problems. Beware of warped cylinder heads and cooling system problems in that situation.Another quick check is to inspect the spark plugs, which in this case didn't look that bad THE DAMAGE: PARTS LIST Description PN SOURCE Price Crusty 302 JMS Racing Engines $120.00 0.040 ring kit 1740058 JMS Racing Engines 43.25 Cam bearings F18 JMS Racing Engines 21.28 Cam and lifters K3601 Summit Racing 79.95 Oil pump EF968 JMS Racing Engines 21.44 Oil-pump shaft IS68 JMS Racing Engines 5.76 Oil-pump screen 68S JMS Racing Engines 10.67 Gasket set F302 JMS Racing Engines 32.80 Rear main seal 17050 JMS Racing Engines 11.48 Timing set 73014 JMS Racing Engines 26.62 Valve guides (16) 140-9106 JMS Racing Engines 20.00 Valvesprings, intake (8) RV994 JMS Racing Engines 16.00 Valvesprings, exhaust (8) RV1167 JMS Racing Engines 18.00 Valve seals (16) VS108V JMS Racing Engines 20.00 Freeze plugs (4) PLC30B JMS Racing Engines 4.48 Balancer DA3022 JMS Racing Engines 95.74 0.010/0.010 302 crank kit 150.00 Water pump WP458 JMS Racing Engines 49.99 Fuel pump 6588 JMS Racing Engines 27.49 Pro Comp distributor PC8022 JMS Racing Engines 1 50.00 Intake manifold 54026 JMS Racing Engines 82.57 Oil filter LF115 JMS Racing Engines 4.90 5 qts. 20W-50 oil JMS Racing Engines 17.50 Spark plugs (8) R5673-8 JMS Racing Engines 20.00 Parts total: $1,149.92 Here's what a junk crankshaft looks like. Lack of regular oil changes will leave your moving parts looking like this. Our crank was too far gone to machine, so we replaced it with a different one.Here's what a junk crankshaft looks like. Lack of regular oil changes will leave your movi Here's where a good relationship with a machine shop works to your advantage. You can take parts to them for cleaning, refinishing, and advice. Hernandez hot-tanked our block and cylinder heads, and glass-beaded and put a fresh 45-degree cut on our valves. He also inspected our cylinders for scratches and discoloration. Since everything looked good, we just needed to hone the cylinders rather than bore them out. Hernandez also Magnafluxed the block and heads for us.Here's where a good relationship with a machine shop works to your advantage. You can take As the teardown progressed, we examined the condition of the pistons and connecting rods. We thought the bearings looked terrible, but the JMS guys said this is normal wear, and not that bad considering the utter lack of regular maintenance this engine suffered. Hillemeyer told us to look for discoloration (indicative of overheating due to lack of lubrication) or deep scratches on the pistons, especially around the skirts and ring lands. Our pistons were in good shape, so we were able to reuse them and the connecting rods.As the teardown progressed, we examined the condition of the pistons and connecting rods. With any rebuild, expect to replace the bearings. We also replaced the cam, cam bearings, and lifters-a given when rebuilding an engine. We used a basic budget cam from Summit.With any rebuild, expect to replace the bearings. We also replaced the cam, cam bearings, « | 1 | 2 | 3 | » | View Full Article Enjoyed this Post? Subscribe to our RSS Feed, or use your favorite social media to recommend us to friends and colleagues!
