Skoolie engines.xlsx

	A	B	C	D	E	F	G	H	I	J	K	L	M	N	O	P	Q	R	S	T	U	V	W	X	Y	Z	AA	AB	AC	AD	AE	AF	AG	AH	AI	AJ	AK	AL	AM	AN	AO	AP	AQ	AR	AS	AT	AU	AV	AW	AX	AY	AZ
1	Manufacturer	Cummins	Cummins	Cummins	Cummins	Cummins	Cummins	Cummins	Cummins	Cummins	Cummins	Cummins	Cummins	Cummins	Cummins	Intl/Navistar	Intl/Navistar	Intl/Navistar	Intl/Navistar	Intl/Navistar	Intl/Navistar	Intl/Navistar	Intl/Navistar	Intl/Navistar	Intl/Navistar	Intl/Navistar	Intl/Navistar	Intl/Navistar	Intl/Navistar	Intl/Navistar	Intl/Navistar	Intl/Navistar	GM	GM	GM	GM	GM	GM	GM	GM	GM	GM	CAT	CAT	CAT	CAT	CAT	CAT	CAT	Mercedes	Mercedes	Mercedes
2	Model	6BT	6BT	ISB	ISB	ISB	6CT	6CT	ISC	ISC	N855 Small Cam	N855 “Big Cam” I	N855 “Big Cam” II	N855 “Big Cam” III	N855 “Big Cam” IV	B175	AT185/A185F	AT190	T444e	VT365	Maxxforce 7	DT360	DT360	DT360	DT408	DT466	DT466B	DT466C	DT466PLN	DT466E	DT466Maxxforce	DT530	Detroit 8.2	6.2l IDI	6.5l IDI	6.5l IDI	Duramax LB7	Duramax LLY	Duramax LBZ	Duramax LMM	Duramax LGH	Duramax LML	3116	3126	3126B	3126E	C7	C7	3208	OM 906 LA	OM 926 LA	OM 904 LA
3	Liters	5.9	5.9	5.9	5.9	6.7	8.3	8.3	8.3	8.3	14	14	14	14	14	6.9	7.3	7.3	7.3	6.0	6.4	5.9	5.9	5.9	6.7	7.6	7.6	7.6	7.6	7.6	7.6	8.7	8.2	6.2	6.5	6.5	6.6	6.6	6.6	6.6	6.6	6.6	6.6	7.2	7.2	7.2	7.2	7.2	10.4	6.4	7.2	4.3
4	Injection	DI	DI	DI	DI	DI	DI	DI	DI	DI	DI	DI	DI	DI	DI	IDI	IDI	IDI	DI	DI	DI	DI	DI	DI	DI	DI	DI	DI	DI	DI	DI	DI	DI	IDI	IDI	IDI	DI	DI	DI	DI	DI	DI	DI	DI	DI	DI	DI	DI	DI	DI	DI	DI
5	Induction	Holset H1C	Holset	Holset	Holset	Holset VGT	Holset	Holset	Holset HX40W	Holset		Holset w/water cooler	Holset T46	Holset HT3B	Holset	NA	NA	ATS 093/Garrett	Garrett	Garrett GT3788VA	VGT	Garrett T04E	Garrett T04E	Garrett T04E	BorgWarner S300V110	T3	Garrett T04	Garrett T04	BorgWarner S300	BorgWarner S300G	BorgWarner S300V110	EVRT/Air-Air	NA & T	NA	NA	Borg-Warner GM-X	IHI RHG6	Garrett GT3788VA	Garrett GT3788VA	Garrett GT3788VA	Garrett GT3582VA	Garrett GT3788VA	Aftercooled	Aftercooled	Aftercooled	Aftercooled	Aftercooled	Aftercooled VGT	NA/Schwitzer/Garrett	Aftercooled	Aftercooled	Aftercooled
6	Years	1984-1993	1994-1998	1998.5–2002	2003–2007	2007-present	1985-1993	1994-1998	1999-2003	2003.5-?	?-1975	1976-1978	1979-1982	1983-1984	1985-1990	1983-1987	1988-1994	1993-1994	1994-2003	2003-2010	2007-?	1987	1988	1989-1994	1994-1995	1975-1977	1977-1981	1982-1992	1993-1997	1994-2006	2007-?	~2002	1979 - 1993	1982-1993	1992-1993	1994-2001	2001-2004	2004-2006	2006-2007	2007-2010	2010-2011	2011-2016		1997	1998-2001	2002	2003-2006	2007-9	1975-1992	1998-Present	2000-Present	1996-Present
7	Layout	L6	L6	L6	L6	L6	L6	L6	L6	L6	L6	L6	L6	L6	L6	V8 90°	V8 90°	V8 90°	V8 90°	V8 90°	V8 90°	L6	L6	L6	L6	L6	L6	L6	L6	L6	L6	L6	V8 90°	V8 90°	V8 90°	V8 90°	V8 90°	V8 90°	V8 90°	V8 90°	V8 90°	V8 90°	L6	L6	L6	L6	L6	L6	V8 90°	L6	L6	L4
8	Cylinder	Parent	Parent	Parent	Parent	Parent	Wet Sleeve	Wet Sleeve	Wet Sleeve	Wet Sleeve	Sleeve	Sleeve	Sleeve	Sleeve	Sleeve	Parent	Parent	Parent	Parent	Parent	Parent	Wet Sleeve	Wet Sleeve	Wet Sleeve	Wet Sleeve	Wet Sleeve	Wet Sleeve	Wet Sleeve	Wet Sleeve	Wet Sleeve	Wet Sleeve	Wet Sleeve	Parent	Parent	Parent	Parent	Parent	Parent	Parent	Parent	Parent	Parent	Parent	Parent	Parent	Parent	Parent	Parent	Parent	Parent	Parent	Parent
9	Valves	12 OHV	12 OHV	24 OHV	24 OHV	24 OHV	12 OHV	12 OHV	24 OHV	24 OHV	24 OHV	24 OHV	24 OHV	24 OHV	24 OHV	16 OHV	16 OHV	16 OHV	16 OHV	32 OHV	32 OHV	12 OHV	12 OHV	12 OHV	12 OHV	12 OHV	12 OHV	12 OHV	12 OHV	24 OHV	24 OHV	24 OHV	16 OHV	16 OHV	16 OHV	16 OHV	32 OHV	32 OHV	32 OHV	32 OHV	32 OHV	32 OHV	12 OHV	18 OHV	18 OHV	18 OHV	18 OHV	18 OHV	16 OHV	18 OHV	18 OHV	12 OHV
10	Fuel System	Bosch VE	Bosch P7100	Bosch VP44	HPCR	CP3/4.2 HPCR	Bosch VP44	Bosch P7100	CAPS	HPCR	Mechanical	Mechanical	Mechanical	Mechanical	Electronic	Stanadyne DB-2	Stanadyne DB-2	Stanadyne DB-2	HEUI	HEUI	HEUI	Bosch PES 6A-2000	Bosch PES 6A-2000/Bosch MW	Bosch PES 6A-2000/Bosch MW	Bosch P3100	AMBAC 100	AMBAC 100	Bosch MW	P3000 or P7100	HEUI				Stanadyne DB-2	Stanadyne DB-2	Stanadyne DS-4	Bosch CP3 HPCR	Bosch CP3 HPCR	Bosch CP3 HPCR	Bosch CP3 HPCR	Bosch CP3 HPCR	Bosch CP4 HPCR	Pumped UI	HEUI	HEUI	HEUI	HEUI	HPCR	Pumped UI	Unit Pump	Unit Pump	Unit Pump
11	Firing Order	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-2-7-3-4-5-6-8	1-2-7-3-4-5-6-8	1-2-7-3-4-5-6-8	1-2-7-3-4-5-6-8	1-2-7-3-4-5-6-8	1-2-7-3-4-5-6-8	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-8-4-3-6-5-7-2	1-8-7-2-6-5-4-3	1-8-7-2-6-5-4-3	1-8-7-2-6-5-4-3	1-2-7-8-4-5-6-3	1-2-7-8-4-5-6-3	1-2-7-8-4-5-6-3	1-2-7-8-4-5-6-3	1-2-7-8-4-5-6-3	1-2-7-8-4-5-6-3	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-5-3-6-2-4	1-2-7-3-4-5-6-8	1-5-3-6-2-4	1-5-3-6-2-4
12	Bell housing	SAE 2,3/Dodge D	SAE 2,3/Dodge D	SAE 2,3/Dodge D	SAE 2,3/Dodge D	SAE 2/Dodge D	SAE 2 or 3	SAE 2 or 3	SAE 2 or 3	SAE 2 or 3						Ford D or SAE 2	Ford D or SAE 2	Ford D or SAE 2	Ford D or SAE 2						SAE 2	SAE 2	SAE 2	SAE 2	SAE 2	SAE 2	SAE 2		GM V8	GM V8	GM V8	GM V8	GM V8	GM V8	GM V8	GM V8	GM V8	GM V8	SAE 2	SAE 2	SAE 1 or 2	SAE 1 or 2	SAE 1 or 2	SAE 1 or 2	SAE 2
13	Starting Aid	Grid	Grid	Grid	Grid	Grid	Grid	Grid	Grid	Grid	Grid	Grid	Grid	Grid	Grid	Plugs	Plugs	Plugs	Plugs	Plugs	Plugs	No	No	No	No	No	No	No	No	Grid	Grid		Plugs	Plugs	Plugs	Plugs	Plugs	Plugs	Plugs	Plugs	Plugs	Plugs	Grid	Grid	Grid	Grid	Grid	Grid	Grid	Grid	Grid	Grid
14	Horsepower	160 - 230	160 - 230	145 - 245	145 - 245	200 - 300	210 - 250	210 - 250	225 - 315	225 - 315									160 - 230			160 - 210	160 - 210	160 - 210		190 - 210	160 - 210	210 - 245	210 - 245	210 - 245	210 - 300	275 - 330	160 - 200				235 - 300	250 - 310	250 - 310	250 - 330	260	397		175 - 330	175 - 330	175 - 330	225 - 300	225 - 300	210 - 375	190 - 260	250 - 330	100 - 175
15	Torque	400 - 605	400 - 605	420 - 660	420 - 660	520 - 660	605 - 728	605 - 728	620 - 950	620 - 950									440 - 620							468	468 - ?	520 - 660	520 - 660	520 - 660		800 - 1050	350 - 430				500 - 520	460 - 590	460 - 590	460 - 330	525	765		420 - 860	420 - 860	420 - 860	520 - 925	520 - 925		520 - 700	800 - 1000	295 - 495
16	Emissions					EGR, DPF & DEF																								EGR 2004+								EGR	EGR	EGR, DPF & DOC	EGR,DPF, DOC & DEF	EGR,DPF, DOC & DEF					DPF	EGR, SCR, DEF & DPF		EGR	EGR	EGR
17	Known Issues	KDP	KDP	KDP	KDP	Clogged turbo			CAPS pump							Inj. Pump	Inj. Pump	Inj. Pump	HPOP Leak	EGR Cooler											Maxxforce		Head Gaskets	Block	Block	Block	Injector failure	Over heat					Tools				Fuel line		Designed as throw away engines	Injector Lines
18			53 Block 98.5-01 issue is rare in buses						Lift pump							Glow System	Block		UVCH	HPOP ‘03.5-04.5											Nuff said		Spun Bearings	Flywheel	Flywheel	Flywheel		Head gaskets				DEF sensor	Injectors	Weak block & dropped valves early engines			Injectors			Plastic fuel lines
19		Lift pump failure leading to injection pump failure																	IPR valve	Head Bolts											See Note		Ring Wear	Head Cracks	Head Cracks	Head Cracks						NOX sensor	FASP Blocks	Weak block & dropped valves early engines			ACERT problems			EGR temp sensor
20																				FICM													Weak Poor		Oil Line	Oil Line						DEF pump								Oil separator
21																				AKA Ford 6.0	AKA Ford 6.4												Design		Inj. Pump	PMD
22	KEY	Ratings - The ratings are based on typical individual responses to the question "what engine/transmission is the best" in multiple Skoolie groups and forums. This is just a compilation of skoolie owners opinions.
23	Green	Typically highly rated and recommended engines. With proper maintenance 300,000+ miles without major problems is common. Known issues should be looked into and properly addressed to ensure longevity.
24	Yellow	CAUTION - Can be good engines with proper maintenance. Engines in this category are either expensive/hard to repair, have a lot of emissions that require extensive maintenace/repair or non turbo and underpowered.
25	Red	AVOID - These engines have know documented major issues. These are mostly emission related problems but some are more than that.
26	Disclaimer	This is just a quick reference guide based on Skoolie owners opinions. I did my best to confirm the information from manufacturers and reliable sources. Please do your own research.
27	Note	Maxxforce engines are black in color, DT466E's are blue in color. These were carried over for the 2007-2008 model years in some buses. Checking color is quick indicator but use the engine vin to verify.
28		There have also been cases of 2003 non-emission engines being fitted into 2004+ model year buses.
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30	Transmissions											Transit or Coach		Transit or Coach
31	Allison	AT545	MT643	1000	2000	2500	MD3060	B210	B220	B295	B300	B400	B3400 xFE	B500
32	Bell housing	SAE #3	SAE #2	SAE #2/3	SAE #2/3	SAE #2/3	SAE #2	SAE #2/3	SAE #2/3	?	SAE #2	SAE #2	SAE #2	SAE #1
33	Torque rating max	445 ft lbs	640 ft lbs	575 ft lbs	575 ft lbs	575 ft lbs	800 ft lbs	520 ft lbs	520 ft lbs	620 ft lbs	735 ft lbs	925 or 1000	925 ft lbs	1300or1700
34	Horsepower rating	235 hp	250 hp	300 hp	300 hp	300 hp	275 hp	230 hp	230 hp	230 hp	280 hp	300 or 330	300 hp	420 or 550
35	Weight dry - basic	267 lbs	510 lbs	330 lbs	330 lbs	330 lbs	535 lbs	323 lbs	323 lbs	535 lbs	535 lbs	535 lbs	535 lbs	831 lbs
36	First	3.45:1	3.58:1	3.10:1	3.51:1	3.51:1	4.59:1	3.10:1	3.10:1	3.10:1	3.49:1	3.49:1	3.49:1	3.51:1
37	Second	2.25:1	2.09:1	1.81:1	1.90:1	1.90:1	2.25:1	1.81:1	1.81:1	1.81:1	1.86:1	1.86:1	2.03:1	1.91:1
38	Third	1.41:1	1.39:1	1.41:1	1.44:1	1.44:1	1.54:1	1.41:1	1.41:1	1.41:1	1.41:1	1.41:1	1.47:1	1.43:1
39	Fourth	1.00:1	1.00:1	1.00:1	1.00:1	1.00:1	1.00:1	1.00:1	1.00:1	1.00:1	1.00:1	1.00:1	1.00:1	1.00:1
40	Fifth	N/A	N/A	0.71:1	0.74:1	0.74:1	0.75:1	0.71:1	0.71:1	0.71:1	0.75:1	0.75:1	0.69:1	0.74:1
41	Sixth	N/A	N/A	0.61:1 (06+)	N/A	0.64:1	0.65:1	0.61:1	0.61:1	0.61:1	0.65:1	0.65:1	0.59:1	0.64:1
42	Reverse	5.03:1	5.67:1	4.49:1	5.09:1	5.09:1	5.00:1	4.49:1	4.49:1	4.49:1	5.03:1	5.03:1	3.80:1	4.80:1
43	Lock-up converter	No	Yes	Yes	Yes	Yes	Yes	Y	Y	Y	Y	Y	Y	Y
44	Fuid type	DEX III	DEX III	TES295/389	TES295/389	TES295/389	DEX III	TES 295	TES 295	TES 295	TES 295	TES 295	TES 295	TES 295
45	Fluid capacity from dry, in quarts. Basic S=Shallow D=Deep	15(S) 20(D)	18	13(S) 15(D)	13(S) 15(D)	13(S) 15(D)	29	11.6 (S) 13.7 (D)	11.6 (S) 13.7 (D)	No info	26 (S) 29 (D)	26 (S) 29 (D)	26 (S) 29 (D)	40 (S) 48 (D)
46	Normal temperature	200F	200F	200F	200F	200F	200F	?	?	?	?	?	?	?
47	Max temperature	250F	250F	250F	250F	250F	250F	?	?	?	?	?	?	?
48
49	Caution	These transmissions are not inherently bad. They are designed more for, stop and go and lower top speeds. They do not have a lock-up torque converter which reduces engine braking and increases heat due to slippage.
50	Caution	They tend to run hot when operated at highway speeds or hills for extended periods of time. This design is not optimal for large "Skoolies" that are traveling the country, over mountains and or towing a car.
51
52	Remedies	A commercial grade transmission cooler can be added to mitigate the heat build up. Increasing engine braking by adding a brake retarder can be done but will be costly. If you have air brakes swapping to an MT643 is possible and common.
53	Remedies	A change to the rear axle ratio (lower numerically) will help with top speed, within reason. Taller rear tires can yield a few more mph too.
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