The contents of this page has been lifted straight from Dave Evan's website with
his permission. Lots of very useful info here !!
Fuel supply: Electronic MPFI (GMP4),
Twin Garrett T25 turbochargers
Water/Air Charge cooler
Bore × stroke 95.00mm × 85.00mm, 3.74 in × 3.35 in
Bore/Stroke ratio 1.12
Displacement 3615 cc (220.601 cu in)
Unitary capacity 602.5 cc /cylinder
Compression ratio 8.20:1
Max. output 382.2 PS (377.0 bhp) (281.1 kW) @5200 rpm
Max. torque 568.0 Nm (419 lbft) (57.9 kgm) @4200 rpm
Maximum rpm 6253 rpm
Specific output 104.3 bhp/litre 1.71 bhp/cu in
Specific torque 157.12 Nm/litre
Max power (bhp/rpm): 377/5,200
Max torque (lbs ft/rpm): 419/4,200
Transmission (ratio/mph per 1,000rpm)
1st 2.68/8.2, 2nd: I .80/12.2
3rd: 1.29/17.0, 4th: 1.00/22.0
5th: 0.75/29.4, 6th: 0.50/44. I
Reverse: Final drive ratio: 3.45:1
Wheels & Tyres (F/R): Alloy, 17x8.5ins 235/45ZR17 Alloy, 17x9.5ins 265/40ZR
Offset ET 28mm Front, ET 7mm Rear
Brakes(F/R): I 2.9/11.8ins ventilated discs. ABS
Steering: Re circulating ball, power-assisted.
ABS sensor check at the abs connector to abs ecu under passenger seat
Front Left: 4-6
Front Right: 11-21
Rear Left: 8-9
Rear Right: 24-26
Sensor resistance should be between 500-2000 ohms
Pins 1 to 18 is in one row, pin 1 at left facing (female cable) connector
Pins 20-35 (less pins than above) are in lower row
Lock-to-lock: 2.6, Turning circle (ft): 32.6
Width: 76. I
Track (F/R): 57/58
Ground clearance: 7
Kerb weight (Ibs): 3,641
Front Independent, MacPherson struts, coil springs,twin-tube dampers, anti-roll bar Rear Multi-link,
semi-trailing arms, progressive rate coil springs, twin-cube dampers, self-leveling
Performance figures (mph/secs)
1/4-mile (secs): 13.5
Max speed (mph): 186
Average mpg: 22.3
What are the differences between a 3.0L 24V and the 3.6L 24V?
Same injector rail and the same lower half
Cam shafts, valve gear, timing gear
C30SE 8.8 grade M12 (1.5mm)
C36GET Lotus 10.9 grade M12 (1.5mm)
Nut: ARP-300-8307 12 point standard style.
Washer: ARP-200-8500 aprox 3mm thick.
Length: 120mm long and has 30mm base thread and fits the threads in the block perfectly. 1.5 threads.
Top threads length 30mm, 1.25 threads.
Nut has 1.25 threads.
About 12$ at summitracing in the US. All ARP sellers should be able to order it in.
Big thanks to Johan Nilsen
cylinder head is basically the same!
The C36GET head has a extra cooling outlet/inlet at #6 on the inlet manifold side.
The piston crown recesses have had a minor but significant amount of alloy milled away.
A standard head can be converted by a competent machinist.
Cracks that don't cause a problem are not unusual.
gasket is very similar between the two engines, I've never seen a new original
head gasket from the early 90's, it's thought that the ones sold now are not
the same as they were then
Material and thickness (1.3mm) is the same
Extra 12 holes of which only 11 are needed in the Lotus version and cost nearly twice as much as 3.0L 24V version!
A 3.0L 24V gasket can be converted with care and a reference gasket,
is basically the same far) the Lotus version has extra webbing, holes for
fitting a piston cooling spray bar
The 3.6V version has 3.6 cast on the side of the block
Oil flow through the block has been reversed.
The 3.6L version has a larger thread for fitting the single knock sensor
A standard 3.0L 24V block would probably last quite well but you take your chances and at your own risk!
Some Lotus blocks develop cracks between water and oil, and between head bolt holes and water channels.
to allow for the extra stroke which gives the engine the torque and capacity!
Same ish... Its
the same basic sump but has extra baffles and take off pipes.
Different... has a larger impeller
Make sure that the engine
cooling system works correctly, if you don't it could be a very costly decision.
Electric Auxiliary Water pump:
to the left of the engine this water pump deals with the immense amount of heat
that the engine dissipates after the engine is switched off, if this pump fails
potentially you risk the head/ block cracking, head gasket failure, turbo
failure every potential scenario is very expensive.
should come on when your A/C does, this shares the same fuse as the electric
suspension, if that doesn't work then it's likely your fan doesn't either. The
Fuse is located in the engine bay fuse box. Failure of the
this component can assist in the worst possible failure scenario as
Self Leveling suspension:
LO/LC is fitted with self leveling suspension it's
intended purpose is to keep the car to a set level as much as possible when traveling
at high speed and when carrying extra load, this is intended to make sure the
suspension operates in it's best operating window. If
shortly after you switch the ignition on you don't hear the sound of a air compressor then chances are
the pump is not working and needs investigation. If the pump is working then
you need to check the link arm that connects from the suspension to a level
sensor attached to the car. Failure of the link arm fixing can cause the rear
suspension to jack up, your unlikely to notice this
whist driving along until you attempt drive around a bend at which point
you'll either come to grief or get lucky!
Should you ever have to remove the gear box:
the spigot bearing in the end of the crank and whist the box is out verify that
the breather located on the top of the gear box is working, to check unbolt and
shake, if it rattles then it works if it doesn't you will have to carefully
remove the cover and clean the bearing.
Before you refit the pivot pin:
a very close look at the bell house where the pivot pin fixes, if the bell
housing is cracked then you need to fix it otherwise you'll be looking again in
the very near future! whilst your there mate the pivot
pin to the fork using grinding paste, this will give the clutch the best chance
of giving failure free service.
Rear Shock absorbers:
you ever purchase new rear Air shock absorbers, check that the valve for the
air supply clears the body of the car, if it doesn't
then you will have to press the bottom bush out and reverse it.
Annoying Tapping from the front of the car:
light tapping from the front of the car when going over small bumps is likely
to be a washer at the top of the front strut, the strut needs to be removed to
replace, these washers are very expensive from Vauxhall/Opel.
Crank Case alignment:
refitting the crank case do exactly what it says in the manual with regards to
the alignment of the crank to cam sensor drive, when you have it right,
sighting down through the top of the crank case you will see the alignment
marks lined up.
sensor has a 1/4" NPT ((USA) National pipe thread).
Lotus Carlton fuel injection system uses a GM P4 (1228331) engine control
module to inject fuel sequentially via six Ac Rochester injectors (9260
of Ball type they have excellent atomisation and a wide spray pattern but are
prone to partial plugging by varnish deposits.These
injectors use 14mm O-rings.
38 #/Hr @ about 300 kpa, 12.2 ohm (4.75gm/s according to the manual)
The ZFS6-40 is a constant-mesh parallel-axial fully synchronized synchromesh transmission. The design incorporates an input/main shaft, a countershaft, and the output/main shaft. The input shaft and main shaft are located on the same axis. The counter shaft is on a parallel axis with the main shaft at a 95mm separation distance. The 1st, 2nd and 3rd idler gears are assembled on the mainshaft. 4th gear is part of the input shaft and is the driving gear. The 5th and 6th idler gears are assembled on the countershaft. All forward and reverse gears are fully synchronized. 1st and 2nd have dual cone clutch synchronizers. 3rd through 6th and reverse have single cone synchronizers.
SYNCHROMESH MECHANISM: Unlike a dog clutch, a cone clutch can progressively increase or decrease its level of torque transfer. Motion is transferred through the shift linkage to the shift fork and then to the sliding collar of the synchronizer hub. Synchronizer hubs are located aft of the reverse idler gear, between 1st and 2nd, between 3rd and 4th, and between 5th and 6th idler gears. As the sliding collar starts to move, pressure pieces momentarily exert pressure on the synchronizer ring forcing it onto the conical binding surface attached to the idler gear. This momentary binding force causes the idler gear to synchronize its rotational speed with the planetary shaft beneath it. As the sliding collar continues to move toward the idler gear, pressure is released off of the binding ring while both sets of dog teeth self align and interlock with each other. Proper sliding collar-to-idler gear dog tooth alignment prior to interlock engagement is provided by 3 evenly spaced sets of 5 dog teeth which protrude further from the remaining dog teeth. These are the preemptive dog teeth located only on the sliding collar. The design of the dog teeth provide a positive lockup at engagement disallowing disengagement until the sliding sleeve is retracted by the gear shifting system. Power loading through the engagement gear further enforces this self-locking effect.
SHIFTER: The shifter selection-rod system is responsible for the tactile sensation for most of the lateral shifter movement and some of the fore-aft movement. The remaining tactile sensation is induced by the detentes on shift rails. A series of locking pins and a ball restrict shift selection to allow for only one rail to move at a time. If you desire more tactile feedback, adjustments can be made by shimming the shifter selection detent springs or driving the shift rod detent spring caps (10mm) in just a hair at a time. Do not exceed 1/8 inch recessed on the 10 mm detent spring expansion plugs. Loctite 609 Retaining Compound will seal them nicely.
DRIVELINE: Torque flows from the engine to the transmission input shaft driving-gear at the front of the gearbox, through the driving gear down to the countershaft, through the driven gears up to the main/output shaft at the rear of the gearbox and down the drive shaft to the rear axle. Fourth has a 1:1 direct torque flow from the input shaft to the output shaft.
FOR TROUBLE: The preemptive dog teeth are most
susceptible to damage when the clutch hydraulic system becomes degraded. The
sensation of notchy shifting is more prevalent when
the sliding collar's preemptive dogteeth become worn
or badly deformed. Advanced stages of preemptive dog
tooth wear may result in gear engagement difficulty due to metal burrs
restricting normal movement of the sliding collar. This condition can also
cause partial engagement of the dog teeth resulting in unexpected gear
disengagement. In any such circumstance, discontinue use of the problematic
gear until necessary repairs can be performed. This may save lots of money in
additional parts when repaired.
HD-engine oil SAE W/20 or SAE30 / Castrol Formula RS racing syntec
10W60 / Castrol syntron 10W/60 / Castrol R synthetic
capacity: .55 gallon (2.1L)
Gear Ratio :1(2.68) 2(1.80) 3(1.29) 4(1.1) 5(0.75) 6(0.5) R(2.5)
Weight : 135 pounds (63.5Kg) approx.
(propshaft) seal, that's still available from VX -
For recons are DOME motorsport in Bromsgrove. Dennis Osborne - the owner.
Prices to have your diff re-conned range from £250-£500, depending what needs doing.
2 Garrett T25's
TB2544 (Garrett#) 452038-0001 (Lotus PartNumber) P530.4021.851AF
TB2545 (Garrett#) 452039-0001 (Lotus PartNumber) P530.4021.852AF
GIF: Compressor Section
JPG: T25 exploded view
JPG: Turbo Cutaway
25011122 Rock Auto
Ac-Delco AC PF897
No longer sold
ELF Classique 20w/50 same as OEM Elf competition order from Cromwell-Tools Part# ZZ20062936 (20L)
Millers CSS 20W50 is an alternative now that elf have discontinued the classique
Jabsco 9200-0021 (cheaper) Jabsco
90393137 (NGK BK6E)
A tip from Joe Ellis
Just for your info, I spoke to NGK and learnt a lot about spark plugs. Both listed plugs
(BCP6ES and BK6E) are exactly the same except that the BK6E is 2.5mm shorter
which probably makes it more difficult to get the plug lead caps on. They also suggested
that their latest iridium plugs will offer better performance and suggested the BKR6EIX
as worth trying. For those with higher boost a colder plug is advised so substitute the 6 for a 7
FRAM CA5107 Vauxhall/Opel/GM 25062406
Castrol RS 10W60
Castrol SAF-XJ 75W140
Aux Ribbed V-belt
same as fitted to renault 5 turbo ?
Aux electric water pump
90393380 12L/min @ 0.12Bar
Lotus A100K6018K(motor agp 12v)
Jabsco 59500-0012 Jabsco
1. Bosch fuel pump for LC
2. Bosch Electric Water Pump
…from Germany, not available in UK takes 3-4 days
Ask for Shaun
Name A P D Ltd (Norwich)
Address 3 Spar Road
St Faiths Industrial Estate
Phone 01603 486020
Fax 01603 417105
1. £109.92 incl. VAT (May 2006)
2. £98.16 incl,VAT (Feb.2008)
Rocker cover filter (internal)
crank case vent
OEM mil-b-83054B polyester foam (60/41/32mm)
Seems to be the same as fish tank filter?
Electric Water Pump Vacuum Solenoid
Mark up your parts calalogue (PS 925 -
page 8-7) with these alternatives:- 1. 90393254 - vacuum valve, Esprit no. A082M6421F £11.70
plus VAT 2. 90393255 - solenoid, turbo Esprit
no. A082M6420F £13.95 plus VAT It appears these parts fail and are not always
detected as having done so but can affect performance and cooling!! I recommend
purchasing a spare - not really expensive. I was helped by a chap called
Russell at my local Lotus dealer:- Stratton Motor
Company (Norfolk) Ltd. 01508 530491 (FAX 01508 531670) email: email@example.com
Mention they are for a Lotus Carlton and my name and ask for Lotus Club
discount and you may get them for £10.53 & £12.55 plus VAT each!
AutobahnStormers View topic - LC Aux-Water-Pump problem
Vacuum solenoid for water ewp valve
OEM DR189 (0170)
Esprit no. A082M6421F £11.70 plus VAT
Contact Russell at Stratton Motor Company (Norfolk) Ltd. 01508 530491
(FAX 01508 531670) email: firstname.lastname@example.org
Vacuum Solenoid part no 214-615 for ewp valve
Desc:- Valve with red dot / 1997225 lotus carlton £38.92
AC Delco Ltd (London)
OCW 19 Wandsworth Rd
Neil tel 0208 8104595
Lotus dealership,used on the Espirit.
Part No:- A082M6420F--Price approx-£13.95 + Vat
Contact Russell atStratton Motor Company (Norfolk) Ltd. 01508 530491
(FAX 01508 531670) email: email@example.com
Idle Air Control Valve
GM 10472401- D555 delco-remy $58.59??
Get from the USA
OEM 10467202- D1998A delco-remy
Get from the states, buick V6?
Engine Management Unit
OEM 1228331 Ac-Delco
esc filter code: 1070033
OEM 16150306 Ac-Delco
OEM 22153583/22153582 Ac-Delco
Positive Crankcase Ventilation (non return valve)
PDF: Non return Valve Patent
Manifold Air Temperature Sensor
OEM 2130 0 AC 12V
2 Bar Manifold Air Pressure Sensor
OEM GM 886 0143 AA-10
AC DELCO 213-183 $85.00 ??
Following source sell the map sensor @oct2007 £46
Product code PMAP3004
1 Bar Atmospheric Air Pressure Sensor
OEM 10456257 delco-remy
Changed to 213970 AC-Delco
(12567712 Delco Remy ?)
After some digging around the internet a part supplied by RockAuto was purchased.
ACDELCO 508 213-970 crankshaft position sensor (9031.80.3890)
This fits ok and works see here
OEM 10096172 delco-remy
25312178 - AFS73 Rock Auto
OEM 25312178- AFS73 ac-delco was afs40
OEM 10497163 ac-delco
Note at 09/03/06
10497163 has changed to 10456208
available from ACDelco (rockauto)
The knock sensor has a 1/4" NPT ((USA)
National pipe thread).
ECU Coolant temp sensor
OEM 25036979 ac-delco
It's the same part as used on some Astras and Montereys –
it comes in an Izusu box
Vauxhall Part Number - 15326386
RRP - £35.66 (£30.35 +VAT)
Lotus number A910E6928F
Available from www.sjsportscars.co.uk
Tel / Fax: 01363 777790
£17 odd incl delivery,
Contact Steve Roberts
Isuzu Part Number - 8-15326386-0
RRP - £61.24 (£52.12+VAT
Same as used on :-
Corsa C 2001-2006 with Y17DT or Y17DTL engine code.
Meriva with Y17DT engine code.
Vectra C 2002+ & Signum with Z30DT engine code (also is OIL Temperature Sensor).
Monterey with 35 or 30TD engine code.
Astra G 1998-2004 with Y17DT engine code.
Frontera B 1999-2004 with 32 petrol engine code.
Thanks Jodie Hunns
Throttle position sensor
Thanks to David Franczak
Part Number :- ETC6443
WRHS/BIN : 01NEW/3EEB04
Description : POTENTIOMETER THROTTLE ROV 3.5 87 8
http://www.motorcarsltd.com/?cookieID=1S10VPK131SM0XE4GM&clientid=motorcars and they also had the following REF numbers
IN102372 POTENTIOMETER THROTTLE ROV 3.5 87 8
XREF: IN102372, 73305, SEB201, ETC6443
Joe Ellis just found that '89 Land Rover TPS is the same as LC/LO.
Intermotor part number 19971.
Possible source of clutch slave cylinder seals
Bore of clutch slave cyliner 1"
Piston slot size: 0.28"/7.34mm
Pistion Seal ID: 0.262"/6.66mm
(used) Piston Seal OD:1.02"/26mm
Clutch pressure plate release bearing same as Porsche 944 Turbo.
It is a Sachs no. 3151-155 301
is not scaled - it's just the value read from the Analogue to Digital
converter inside the ECU. There isn't a simple equation to convert the
value into an actual temperature, the ECU has the following table in it :
0 = - 40 Deg C
16 = - 7 Deg C
32 = + 6 Deg C
64 = + 24 Deg C
96 = + 37 Deg C
128 = + 50 Deg C
160 = + 64 Deg C
192 = + 81 Deg C
224 = + 109 Deg C
240 = + 138 Deg C
255 = + 196 Deg C
You need to interpolate between these fixed points to get the real
ICI Paint Manufacturer
One Way Valve
Brake servo non-return valve,
Vauxhall part number is
90498464 and retails at £3.82+VAT (£4.48 Inc)
It's a standard part on loads on Vauxhalls, old (Corsa B) and new (Vectra C).
Thanks to Keith Forrest for that info