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For all things Rover V8, the TVR Griffith and Chimaera and TVR T-Cars

Code	Meaning	Comments
2	Live feed to ECU has been interrupted	Normal if ECU has been disconnected to clear old fault codes. Code 02 will clear if ignition turned off for 30 secs then on again.
3	Stored data corrupted since last trip	No useful information available. Test drive and try again.
12	Airflow meter out of range	Possible air leak or wiring fault.
14	Coolant thermistor out of range	Faulty sensor or wiring.
15	Fuel thermistor out of range	Faulty sensor or wiring.
17	Throttle sensor out of range	Sensor needs adjustment or is faulty or has wiring fault. This can cause low speed misfires
18	Throttle sensor output too high when air flow low	Large air leak between throttle butterfly and A/F meter or faulty throttle sensor or A/F meter.
19	Throttle sensor output too low when airflow high	Faulty A/F meter or throttle sensor.
21	Tune resistor out of range	Check tune resistor resistance.
23	Low fuel pressure	Blocked fuel filter or faulty pump or pressure regulator. Valid for cat cars only.
25	Misfire at full load	Faulty plugs, leads, electronic ignition unit, distributor or coil, low fuel pressure or valve or head gasket leak. See 40 and 50. Valid for cat cars only.
28	Air leak	Leak in A/F meter hoses, injector seals, inlet manifold gasket, plenum gasket, servo or crankcase vent hoses or Lambda sensors. Valid for cat cars only.
29	Checksum error	A dead ECU.
34	Fuelling fault in nearside injector bank	Injector or Lambda sensor wiring fault, faulty injectors, air leak at injector seals or inlet mainfold, blocked injectors. Valid for cat cars only.
36	Fuelling fault in offside injector bank	As above but for cylinders 2-4-6-8 only. Valid for cat cars only.
40	Misfire on nearside bank	As 25 but for cyclinders 1-3-5-7 only. Valid for cat cars only.
44	Nearside Lambda sensor out of range	Faulty or lead-poisoned sensor or sensor wiring fault. Valid for cat cars only.
45	Offside Lambda sensor out of range	As above. Valid for cat cars only.
48	Stepper motor fully open above 500 rpm or fully closed above 750 rpm	Sticking stepper valve, incorrect base idle speed adjustment, air leak on non-cat cars, incorrect stepper motor adjustment, incorrect throttle butterfly adjustment, rough running because of fuel or ignition or mechanical faults.
50	Misfire on offside bank	A 25 but for cylinders 2-4-6-8 only. Valid for cat cars only.
59	ECU unable to distinguish between faults 23 and 28	Fault occured for insufficient time for ECU to diagnose.
68	Road speed sensor output too low at medium rpm and high air flow	Possible sensor or wiring fault (will also cause wrong speedo readings on electrical speedo cars). Valid for cat cars only.
88	Power-up check	Not a fault. Sometimes displayed on first connecting test module.

ECU Fault Codes
This information is included for general interest, or for those who know how to make use of it and have access to the correct diagnostic equipment. The test module supplied to TVR dealers can detect 22 fault codes from the ECU. Data from 1997.

Note that pre-cat cars will display certain fault codes when there is no actual fault (they are noted in the list). Fault codes are stored in the ECU until its live feed is disconnected, and this must be done after a fault has been rectified otherwise the ECU will continue to ignore the supposedly faulty sensor(s).

ECU Sensor Checks

Data from January 1998
To carry out these tests you will need a multimeter and access to the back of the 40-way plug that connects the ECU harness to the ECU. Access is obtained by removing the ECU plug and rolling back the plug's shroud to expose the pin connections. Some tests require the plug to be re-connected to the ECU and some are done with it disconnected. There are a few pin numbers on the back of the plug, but in case you can't make them out, the pin numbering (looking at the back of the plug with the harness coming in from the right) is thus:

28 29 30 31 32 33 34 35 36 37 38 39 40

27 26 25 24 23 22 21 20 19 19 17 16 15 14

01 02 03 04 05 06 07 08 09 10 11 12 13

Don't blame me if tinkering about here produces a puff of smoke and a large bill!

Power Supply to ECU
ECU plug connected. Ignition off. Voltage between pin 15 and ground should be same as battery voltage and at least 10V.

Airflow Sensor
ECU plug connected. Ignition on. Should be 0.3V-0.6V between pin 35 and ground.

Coolant Sensor
ECU plug disconnected. Ignition on. Should be 2400-2600 ohms between pins 7 and 25 when coolant at 20C, 300-400 ohms at 80C.

Fuel Temperature Sensor
ECU plug disconnected. Ignition off. Resistance as for coolant sensor but between pins 25 and 32.

Throttle Potentiometer
ECU plug disconnected. Ignition off. Should be 5000 ohms between pins 3 and 25.
ECU plug connected. Ignition on. Voltage between pin 20 and earth should swing smoothly from 0.26V-0.36V to 4.6V-5.0V as throttle is moved from fully closed to fully open.

Tune Resistor
ECU plug disconnected. Ignition off. Resistance between pins 5 and 27 should be 446-494 ohms on non-cat cars (green wire resistor), and 2700-4100 ohms for cat cars (white wire resistor).

Injectors and Lambda Sensors
Injectors for cylinders 1-3-5-7 should be connected to pin 13 via yellow and blue wires.
Injectors for 2-4-6-8 should be connected to pin 11 via yellow and white wires.
Lambda sensor for 1-3-5-7 should be connected to pin 23 via a blue wire.
Lambda sensor for 2-4-6-8 should be connected to pin 24 via a blue wire.

ECU plug disconnected. Ignition off. Resistance between pins 2 and 13 and between 2 and 11 should be 4-5 ohms.
ECU plug connected. Ignition off. 12V between sensor earth connections and ground.

Engine running at 1000 rpm. Fluctuating 0.5-1.0V between pins 4 and 23 (sensor for 1-3-5-7) and between pins 4 and 24 (sensor for 2-4-6-8). Low voltage indicates faulty sensor or air leak, low fuel pressure or faulty injectors. Steady 1.0V indicates faulty sensor or high fuel pressure, leaking injectors or saturated carbon canister.

Stepper Motor
ECU plug disconnected. Ignition off. Should be 48-58 ohms between pins 1 and 26 and 48-58 ohms between pins 28 and 29.

Road Speed Sensor
ECU plug disconnected. Ignition on. Should be either a fluctuating voltage from 0 and 12V or from 0.5 and 5V between pin 6 and ground when car is rolled forward slowly (depends on type of sensor fitted).

	400	400HC	4.3	4.5BV	500HC
Capacity	3950	3950	4280	4441	4988
Bore mm	94	94	94	94	94
Stroke mm	71	71	77	80	90
Max rpm	6250 (1)	6250 (1)	0	6250 (6)	6000 (1)
BHP	240 (1&2) @ 5250 (2)	275	280 @ 5500 (2)	310 (6)	325@5500 (2)
Torque ft.lbs	270 (1&2) @ 4000 (2)	305 (1) @ 4000 (2)	305@4000 (2)	328 (6)	350(1&2)
CR	9.5:1 9.8:1 (1&2)	9.5:1 9.8:1 (1)	9.5:1 10:1 (2)	9.5:1 10:1 (1)	9.6:1
Crankshaft	0	0	TVR	TVR	TVR
Conrods	0	0	Land Rover balanced	Land Rover balanced	TVR
Pistons	0	0	TVR spec	TVR spec	TVR spec
Flywheel	0	0	TVR	TVR	TVR ribbed lightweight
Clutch	0	0	AP racing	AP racing	AP racing TVR 500
Crank Assy	0	0	Fully balanced	Fully balanced	Fully balanced
Camshaft	TVR 51	TVR 435R/M	TVR 214	TVR 234	TVR 435R/M
Cam drive	0	duplex	duplex	duplex	duplex
Cylinder heads	Balanced & polished	Balanced & polished	Ported balanced & polished	Ported balanced & polished	Ported balanced & polished
Inlet valves	0	0	4.3 Vitesse (BV as 4.5)	42.8mm Tuftrided SS	42.8mm Tuftrided SS
Exhaust valves	0	0	4.3 Vitesse (BV as 4.5)	36.8mm Tuftrided SS	36.8mm Tuftrided SS
Valve springs	TVR racing double	TVR racing double	TVR racing double	TVR racing double	TVR racing double
Inlet trumpets	0	0	0	0	TVR 44mm
Inlet manifold	0	0	Ported & polished	Ported & polished	Ported & polished 44mm
Ign timing (5)	32 deg	32 deg	32 deg	30 deg	28 deg
	400	400HC	4.3	4.5BV	500HC

Engine specifications

The table below is was published in 1996 and, although the author’s caveat was that he could not promise it was correct, it stood the test of time. I too cannot vouch for it accuracy. If you know better, please let me know. The original source was TVR Power.

Notes:
A zero entry implies standard Range Rover spec, although this is not stated explicitly in the TVR spec sheets.
1 Figure from 'TVR' customer magazine No. 1 Summer 1995.
2 Figure from 'TVRs Volume 2' by Graham Robson 1993. Thus may refer to earlier specs.
3 Crank assemblies balanced (where shown) to Gas Turbine Spec G 2.5 ISO 1940 or 14g per Kg rotor weight @ 6000 rpm.
4 Camshaft drive (where shown) has vernier adjustable sprockets and duplex racing chain.
5 Ignition timing at 3750 rpm with vacuum advance disconnected. May have changed since model started production to accommodate reducing octane rating of pump petrol.
6 4.5BV maximum rpm, BHP and torque provided by Steve Beresford.

These torque wrench settings are for the Rover V8 engine as given by the Land/Range Rover workshop manual. I am told they are ‘generally applicable’, whatever that means. If you have a later RV8 from TVR Power I would suggest that head bolt sequence tightening is checked with them.

The table below is to be used when there is no specific torque notified in the table on the left.

The alloy used in the construction of the RV8 engine is quite soft. Ignore these torque settings at your peril.

	Nm	lb.ft	See
Crankshaft pulley bolt	270	200
Camshaft gear bolt	50	37
Camshaft thrust plate bolts	25	18
Rocker cover bolts			Note 1
Stage 1	4	3
Stage 2	8	6
Stage 3 - loosen and re-torque to:	8	6
Rocker shaft to cylinder head bolts	38	28
Cylinder head bolts			Note 1 & 2
Stage 1	20	15
Stage 2	Then 90 degrees
Stage 3	Further 90 degrees
Lifting eye to cylinder head bolts	40	30
Connecting rod bolts:
Stage 1	20	15
Stage 2	Further 80 degrees
Main bearing cap bolts - Nos. 1 to 8			Note 1
Stage 1 - initial torque	13.5	10
Stage 2 - final torque	72	53
Rear main bearing cap bolts - Nos. 9 and 10			Note 1
Stage 1 - initial torque	13.5	10
Stage 2 - final torque	92	68
Main bearing cap side bolts - Nos. 11 to 20			Note 1
Stage 1 - initial torque	13.5	10
Stage 2 - final torque	45	33
Flywheel bolts	80	59
Drive plate assembly bolts	45	33
Drive plate hub aligner to crankshaft socket head cap screws	85	63
Oil sump drain plug	45	33
Oil sump nuts and bolts	23	17	Note 1
Oil pump cover plate screws	4	3	Note 3
Oil pump cover plate bolt	8	6	Note 3
Spark plugs .	20	15
Timing cover/coolant pump to cylinder block bolts	22	16
Oil pick-up pipe to oil pump bolts	8	6
Oil pick-up pipe nut	24	18
Knock sensors to cylinder block	16	12
Camshaft sensor to timing cover bolt	8	6
Crankshaft position sensor bolts	6	4
Oil cooler connections	15	11

Note 1: Tighten in sequence
Note 2: Lightly oil threads prior to assembly
Note 3: Coat threads with Loctite 222 prior to assembly

	Nm	lb.ft
M5	4	3
M6	6	4
M8	18	13
M10	35	26
M12	65	48
M14	80	59
M16	130	96
1/4 UNC/UNF	9	7
5/16 UNC and UNF	25	18
3/8 UNC and UNF	40	30
7/16 UNC and UNF	75	55
1/ 2 UNC and UNF	90	66
5/8 UNC and UNF	135	100

Torque settings

Engine torque settings

Thanks to Richard Constable for letting me use this data which he obtained from Iain Jones.

One thing worth noting the torques only apply to the UNF threads, if a bolt with a UNC is used the torque will have to vary to get the same stretch on the bolt to ensure there is sufficient load on the thread so the nut doesn't come undone.

Chassis nut and bolt sizes and torque wrench settings

Component	ft lbs	Nm
Caliper to front upright	43	50
Track rod end to upright	30	40
Bottom balljoint to upright	60	81
Top balljoint to upright	60	81
Upper balljoint adapter pinch bolt	59	80
Top front wishbone to balljoint HSG	35	47
Bottom wishbone to balljoint HSG	12-15	16
Steering rack mountings	12-15	16
Steering UJ clamp bolts	12-15	16
Front & rear hub retaining nuts	229	310
Rear caliper to bearing carrier	40	54
Rear bearing carrier to upright	45	61
Differential front allen bolts	90	122-136*
Differential bushes to chassis	48	65
Rear diff carrier to diff (cap Hd)	33	45
Top rear diff bush pinch bolt	45	61
All front wishbones to chassis	45	61
All rear wishbones to chassis	45	61-65#
All rear wishbones to upright	45	61
All damper bolts	55	75
Roll bar mounting clamp to chassis	30	40
Drive shaft bolts to diff	32	38
Drive shaft bolts to axle shafts	32	38
Seat belt anchorage bolts	25	34
Wheel nuts	73	99
Brake master cyl to servo	15	20
Front crossmember	45	61
Gearbox crossmember	45	61

Chassis torque settings

Easy to read torque wrench settings from another source.

Location

Bolt length

Thread

Bolt head

Nut Head

Torque

Bracket to Front Upright

30mm

M10

8mm Hex

43 - 44lbft

Caliper to Bracket

30mm

M10

8mm Hex

Front Shock Lower

1/2 UNF

3/4" 19mm

5/8 " 16 mm

55 - 60lbft

Front Shock Upper

1/2 UNF

3/4" 19mm

5/8 " 16 mm

55 - 60lbft

Front Wishbone Lower Front

7/16 UNF

5/8 " 16 mm

45 - 50lbft

Front Wishbone Lower Outer

70mm

13mm

12 - 15lbft

Front Wishbone Lower Rear

7/16 UNF

5/8 " 16 mm

3/4 " 19 mm

45 - 50lbft

Front Wishbone Upper Front

7/16 UNF

5/8 " 16 mm

45 - 50lbft

Front Wishbone Upper Outer

7/16 UNF

5/8 " 16 mm

35 - 40lbft

Front Wishbone Upper Rear

7/16 UNF

5/8 " 16 mm

45 - 50lbft

Lower Ball Joint to Upright

22mm

60 - 65lbft

Rear Bearing Carrier to Upright

35mm

M10

8mm Hex

45 - 48lbft

Rear Shock Lower

3 1/2"

1/2 UNF

19mm

55 - 60lbft

Rear Wishbone Lower Front

7/16 UNF

5/8 " 16 mm

19mm

45 - 50lbft

Rear Wishbone Lower Outer

3 1/2"

7/16 UNF

5/8 " 16 mm

45 - 50lbft

Rear Wishbone Lower Rear

7/16 UNF

5/8 " 16 mm

45 - 50lbft

Rear Wishbone Upper Front

4 1/2"

1/2 UNF

19mm

55 - 60lbft

Rear Wishbone upper Outer

7/16 UNF

5/8 " 16 mm

45 - 50lbft

Rear Wishbone Upper Rear

7/16 UNF

5/8 " 16 mm

45 - 50lbft

Toe Adjuster

1/2 UNF

19mm

55 - 60lbft

Track Rod End

17mm

30 - 35lbft

Upper Ball Joint to Upright

19mm

60 - 65lbft

Upright Pinch Bolt

70mm

M12

19mm

60lbft