|  | | | BMW E21 Camshafts & Timing Chains - Page 1 | | This section contains Pistons, Rings and related components for your E21 3 Series BMW. Rebuilding your engine is a process that should be done right. For the most reliable of rebuilds, replace your pistons and rings with new ones. If you are reusing your old pistons, make sure that you have them checked at a good machine shop to make sure that the ring grooves are not worn. Also, the inside of the cylinders should be honed. Failure to do so may result in a new set of rings not seating properly. |
| Camshafts | | Original camshafts can be reground to work in rebuilt motors, however, they will never perform as well as a new one. This is because there is no way to replace the worn material on the cam lobes. While performing a full rebuild, you should replace both the camshaft and the lifters. If you regrind your old camshaft, make sure that you regrind the lifters as well. |
| | 11-31-0-631-014-BOE | Camshaft, 320i (1976-09/79), Each
Brand: Genuine BMW | $287.75 |  | | 11-31-1-272-442-BOE | Camshaft, 320i (09/79-83), Each
Brand: Genuine BMW | $610.50 | | Timing Chains & Rails  | | Another important set of components not to overlook are your timing chains and gears. The timing chains and belts keep the pistons and valves aligned and running in sync. If the chain slips or the belt breaks, then the pistons will most likely hit the valves, and you will have some very expensive engine rework on your hands. Don't chance it - use new parts here. If you don't change the belt and it snaps, the valves can hit the pistons and cause something similar to this.. WARNING, not for the faint of heart.Valve Disaster Article. |
| | Timing Chains | 
11-31-0-731-105-M48 | Timing Chain without Master Link, Double Row, 320i (1976-10/78), Each
Brand: Iwis [Photo] |  |
| $48.75 | | 
11-31-1-716-986-M48 | Timing Chain, Single Row, 320i/is (11/78-83), Each
Brand: Iwis [Photo] | |
| $36.25 | | | Timing Chain Rails | 
11-31-1-253-236-M77 | Timing Chain Rail, Plastic, 320i/is (1976-83), Each
Brand: Swag [Photo] | |
| $9.75 | | | Chain Tensioner Rails | 
11-31-1-262-273-M200 | Chain Tensioner Rail, 320i/is (1976-83), Each
Brand: MTC [Photo] | |
| $15.25 | | | Chain Tensioners/Parts | 
11-31-1-744-347-M36 | Chain Tensioner Piston, 320i/is (1976-83), Each
Brand: Febi [Photo] | |
| $15.75 | | 
11-31-0-731-115-M59 | Chain Tensioner Spring, 320i/is (1976-83), Each
Brand: Laso [Photo] | |
| $1.75 | | Timing Chain Sprockets | 
11-31-0-631-105-M77 | Timing Chain Sprocket, Camshaft, Double Row Chain, 320i (1976-10/78), Each
Brand: Swag [Photo] | |
| $50.25 | | | 11-21-1-260-571-M9 | Timing Chain Sprocket, Crankshaft, Double Row Chain, 320i (1976-10/78), Each
Brand: Genuine BMW [Photo] | |
| $102.75 | | | 11-21-1-265-010 | Timing Chain Sprocket, Crankshaft, Single Row Chain, 320i/is (11/78-83), Each | $25.75 | | Timing Chain Cover Gaskets | | 11-14-1-727-978-M17 | Timing Cover Gasket, Upper Right, 320i/is (1976-83), Each
Brand: Victor Reinz | |
| $1.25 | | | 11-14-1-727-979-M17 | Timing Cover Gasket, Upper Left, 320i/is (1976-83), Each
Brand: Victor Reinz | |
| $1.25 | | | 11-14-1-727-980-M17 | Timing Cover Gasket, Lower Right, 320i/is (1976-83), Each
Brand: Victor Reinz | |
| $2.50 | | 
11-14-1-727-981-M17 | Timing Cover Gasket, Lower Left, 320i/is (1976-83), Each
Brand: Victor Reinz [Photo] | |
| $2.00 | |
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