M10 - Revision history

Grrrmachine at 08:34, 20 January 2014

2014-01-20T08:34:07Z

Grrrmachine at 08:30, 20 January 2014

2014-01-20T08:30:28Z

Grrrmachine at 17:19, 20 September 2012

2012-09-20T17:19:01Z

Grrrmachine at 17:18, 20 September 2012

2012-09-20T17:18:45Z

Grrrmachine at 10:50, 12 September 2012

2012-09-12T10:50:25Z

Grrrmachine at 18:32, 11 September 2012

2012-09-11T18:32:42Z

Grrrmachine at 16:56, 11 September 2012

2012-09-11T16:56:42Z

Grrrmachine at 16:45, 11 September 2012

2012-09-11T16:45:16Z

Grrrmachine at 15:52, 11 September 2012

2012-09-11T15:52:55Z

Grrrmachine at 12:13, 11 September 2012

2012-09-11T12:13:27Z

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 ==Carburettor Upgrade==
-The Pierburg 2BE carburettor found in [[316]] models is not considered a particularly good carburettor. Converting to a Weber carburettor will yield more power and more tuning options. Learn more about [[Weber_Carburettors|Weber carburettors]].
+The Pierburg 2BE carburettor found in most [[316]] models is not considered a particularly good carburettor. Converting to a Weber carburettor will yield more power and more tuning options. Learn more about [[Weber_Carburettors|Weber carburettors]].
 =Common Upgrades=

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 ===Cam===
-On the M10, an overhead camshaft drives the intake and exhaust valves via [[M10#Rocker_Arms|rocker arms]]. This camshaft is chain-driven, and held in place using 5 bearings. It is lubricated by an overhead oil spray bar. The rear end of the cam features the gearing to power the [[Ignition#Distributor|distributor]].
+On the M10, an overhead camshaft drives the intake and exhaust valves via [[M10#Rocker_Arms|rocker arms]]. This camshaft is chain-driven, and held in place using 3 bearings. It is lubricated by an overhead oil spray bar. The rear end of the cam features the gearing to power the [[Ignition#Distributor|distributor]].
 All engines use the same cam, which is also compatible with the [[E21]] engine.
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 All engines use an 8mm stem.
 ===Rocker Arms===

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 The [[BMW]] '''M10''' is a 4-cylinder [[Engines|engine]], fitted to the [[E30]] from its 1982 launch until 1987.
-[[Image:M10B18.jpg.jpg|thumb|600px|right|M10B18 fuel-injected engine]]
+[[Image:M10B18.jpg|thumb|600px|right|M10B18 fuel-injected engine]]
 __TOC__
 =History=

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 The [[BMW]] '''M10''' is a 4-cylinder [[Engines|engine]], fitted to the [[E30]] from its 1982 launch until 1987.
 __TOC__
 =History=

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 M10 engine mounts are the standard design of aluminium arms cushioned with rubber mounts. On some models a hydraulic shock absorber was also fitted to provide superior vibration damping.
-If you are taking an engine from an [[E21] or [[E28]], you will need E30 engine mounts.
+If you are taking an engine from an [[E21]] or [[E28]], you will need E30 engine mounts.
 =Servicing=

@@ Line 117: / Line 117: @@
 ===Timing Chain===
-The M10 uses a chain to drive the valvetrain (unlike the [[M20]] and [[M40]] engines). Therefore, a sprocket is mounted at the end of the [[M10#Crankshaft|crankshaft]] to power the chain, which drives a corresponding sprocket on the camshaft. While some people feel that chains are indestructible, it is recommended to replace this chain every 100,000 miles. In the event of a noisy chain, replacing the chain tensioner should quieten things down.
+The M10 uses a chain to drive the valvetrain (unlike the [[M20]] and [[M40]] engines). Therefore, a sprocket is mounted at the end of the [[M10#Crankshaft|crankshaft]] to power the chain, which drives a corresponding sprocket on the camshaft. Most people feel that chains are indestructible, but it is recommended to replace the tensioner every 100,000 miles. In the event of a noisy chain, replacing the chain tensioner should quieten things down.
-Learn more about [[M10_Timing_Chain_Change|changing the timing chain]].
+Learn more about [[M10_Timing_Tensioner|changing the timing chain tensioner]].
 ==Head==
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 ''Main article: [[Basic_M10_Servicing|Basic M10 Servicing]]
-Every engine needs its fluids and filters changed regularly. The M10 engine will also needs its timing chain replaced after a certain mileage, but more important is the condition of the chain sprocket. If yours is getting rattly, learn more about [[M10_Timing_Chain_Change|changing the timing chain]].
+Every engine needs its fluids and filters changed regularly. The M10 timing chain tensioner will also needs its timing chain replaced after a certain mileage. If yours is getting rattly, learn more about [[M10_Timing_Tensioner|changing the timing chain tensioner]].
 =Common Problems=

←Older revision		Revision as of 16:56, 11 September 2012
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	=Common Problems=		=Common Problems=
		+
		+	While the M10 was a sturdy engine, it does wear down and all surviving E30 units will be over 25 years old now. Therefore, most will be suffering from some form of engine wear to the point of requiring a full rebuild.

	==Carburettor Upgrade==		==Carburettor Upgrade==

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 ===Cam===
-On the M10, an overhead camshaft drives the intake and exhaust valves via [[M40#Tappets|tappets]]. This camshaft is belt-driven, and held in place using 5 bearings. It is lubricated by an overhead oil spray bar.
+On the M10, an overhead camshaft drives the intake and exhaust valves via [[M10#Rocker_Arms|rocker arms]]. This camshaft is chain-driven, and held in place using 5 bearings. It is lubricated by an overhead oil spray bar. The rear end of the cam features the gearing to power the [[Ignition#Distributor|distributor]].
-The cam is the known weak spot of the M40 engine, and is more susceptible to lobe wear than any other E30 engine, usually caused by a blocked oil spray bar. When the cam is worn, the engine [[M40#Won't_Rev_Over_5000|won't rev high]].
+All engines use the same cam, which is also compatible with the [[E21]] engine.
 ===Valves===
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 [[316]]: '''42mm''' intake, '''35mm''' exhaust
 [[316i]]/[[318i]]: '''46mm''' intake, '''38mm''' exhaust
 ===Rocker Arms===
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 ===Breather Hose===
-To balance the pressure inside the head, a rubber hose runs from the top of the [[M10#Rocker_Cover|rocker cover]] to the [[Intake#Throttle_Body|throttle body]].
+To balance the pressure inside the head, a rubber hose runs from the top of the [[M10#Rocker_Cover|rocker cover]] to the [[Intake#Throttle_Body|throttle body]] or [[Intake#Air_Filter|air filter]], depending on engine version.
 ==Ancilliaries==
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 ===Flywheel===
-The M10 flywheel is a single mass wheel which keeps the engine spinning long after you take your foot off the throttle. It is also the flat surface to which the [[Drivetrain#Clutch|clutch]] mates, ultimately transferring power from the engine to the [[Drivetrain]]. The edge of the flywheel is toothed. Known as the ring gear, it is what allows the [[M40#Starter_Motor|starter motor]] to bite onto the engine to start it. The flywheel bolts to a pulley at the end of the [[M10#Crank|crank]].
+The M10 flywheel is a single mass wheel which keeps the engine spinning long after you take your foot off the throttle. It is also the flat surface to which the [[Drivetrain#Clutch|clutch]] mates, ultimately transferring power from the engine to the [[Drivetrain]]. The edge of the flywheel is toothed. Known as the ring gear, it is what allows the [[M10#Starter_Motor|starter motor]] to bite onto the engine to start it. The flywheel bolts to a pulley at the end of the [[M10#Crank|crank]].
 For manual engines, the flywheel contains a spigot bearing to centre the input shaft of the gearbox to the tail of the [[M10#Crankshaft|crankshaft]]. These parts are essential when [[Auto_To_Manual|converting from auto to manual]]. For automatic cars, the flywheel is little more than a ring gear with a plate to which the torque converter is bolted.
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 The starter is wired directly to the [[Battery]] + terminal and the alternator. A smaller connection, fed by a black/yellow wire, is the incoming signal from the ignition switch. On facelift vehicles there is also a black/green wire to load reduction relays.
 ===Engine Mounts===
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 =Common Problems=
 =Common Upgrades=
-==Carburettor Upgrade==
+The M10 is an incredibly tunable engine; BMW's racing division achieved 1350hp from the unit in 1986. The possibilities are pretty much endless, with twin-carb setups, stroker engines and turbo-charging all common features among M10 modifiers.
-The Pierburg 2BE carburettor found in [[316]] models is not considered a particularly good carburettor. Converting to a Weber carburettor will yield more power and more tuning options. Learn more about [[Weber_Carburettors|Weber carburettors]].
+A lot of modifying involves stroking the engine with components from the [[S14]] engine; specifically the crankshaft and piston rods.
 =Useful websites=

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 =Components=
-The engine in all E30s is a three-part design, featuring a cast-iron '''Block''' with a '''Sump''' at the bottom and an aluminium '''Head''' at the top.
+The engine in all E30s is a three-part design, featuring a cast-iron '''Block''' with a steel '''Sump''' at the bottom and an aluminium '''Head''' at the top.
 ==Sump==
 =Servicing=

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 At the end of 1982 with the release of the E30, a 1.8 litre carburreted version was fitted to the base model [[316]] and a fuel-injected version powered the [[318i]]. A smaller 1.6litre carburreted engine from the [[E21]] was exported to Greece and Yugoslavia as the rare 316s. These models comprised the 4-cylinder range of E30 engines alongside the [[M20]]-powered [[320i]] and [[323i]]. To compliment BMW's range, the 1.8 engine would be fitted to the 5-series [[E28]].
-After the September 1987 facelift the fuel-injected M10 would be known as the [[316i]], removing the 316 from the model line-up. The 318i was fitted with the new [[M40]] engine which would also power the 316i from September 1988.
+The M10 continued through the E30's September 1987 facelift. The 316 continued on, while the fuel-injected M10 was rebadged as the [[316i]], freeing up the 318i name for the new [[M40]] engine. But after just one year the 316 was dropped and the 316i received a smaller M40 engine, removing the M10 engine from the E30 range in September 1988.
 However, this was not the end of the E30's relationship with the M10. In September 1986, the [[S14]] engine was fitted to the first [[M3]]. Based upon the M10 block, this engine would be pushed to 2.5l during its lifetime, with the final 1991 models achieving 235hp.
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 All M10 engines use a timing chain.
 =Servicing=