MK2 which revision?

[jim-mapps]

How do I tell which revision a MK2 is? I've been searching but can't find anything. Looking at a J reg and wondered which revision I'm looking at.

[Mikey P MR2]

if its not modified look at the front lip on the bottom of the bumper rev1 is the small one, rev2 is the deeper one.
if has stock wheels still (unlikely) then rev1 has 14" wheels and rev2 onwards 15" ones but these are oftern swapped over.

[xanthus400]

id say a j reg is a rev 1 but not sure mines a k reg rev 2 engine is slightly different from rev 1 to rev 2 and i think rev 1 didnt have front fog lights might be wrong on that. defo look at the splitter as mikey p said

[craig]

Post a pic mate

[mistertwo_2008_uk]

TAKEN FROM = http://www.mr2turbo.info/diff.html


Japanese MR2 turbo information: differences and similarities



Revision dates
Revision 1 begins about Oct 89
Revision 2, about Jan 92 (SW20-0059266 onwards)
Revision 3, Oct 93 (SW20-0087386 onwards)
Revision 4, Jun 96
Revision 5, Nov 97 (ends sometime in 2000)
The big revisions were revision 2 for the chassis and revision 3 for the engine (and ABS). The rest were mainly cosmetic.



Model codes
The model code for my 94 revision 3 Japanese MR2 GT (turbo) is E-SW20 ACMZZ. The chassis number is something like SW20-0093123.
SW20 is commonly used to mean 'mark 2 MR2', even though in some markets some non-turboed mark 2 MR2s had the SW21 prefix. The turbo engine in the MR2 turbo is known by the code '3S-GTE', but note there are a good few 3S-GTE variants used in different cars over about a 15 year period.




Differences between revision 1 & 2 engines and revision 3
Just a quick list, do not take any of these as gospel:
position and orientation of oil filter changed.
different internal engine parts, e.g. pistons, con-rods etc.
turbo charger changed from Toyota CT26 to CT20B (same intercooler though).
boost pressure raised from about 10 to about 13 PSI.
power output raised from 220 to 240 BHP.
compression ratio slightly lowered.
injector size increased from 430cc to 540cc.
fuel cut threshold raised from about 12 PSI to about 18 PSI.
head and inlet path completely redesigned. TVIS removed, 8 'independent long ports' reduced to 4.
throttle body increased from 55mm to 60mm.
inlet valve lift increased from 8.2 to 8.7.
different, smarter engine ECU, more tolerant of poor fuel, different connector pin out.
air flow meter removed.
intake manifold inlet air temperature sensor added. i.e. after turbo and intercooler.
ECU now modulates the turbo VSV to achieve variable control of boost pressure rather than either open/full or closed/reduced. Control of boost now quite subtle when ECU is unhappy because of temperatures, detonation, speed, etc.
location of valve shims moved (someone said this was to stop problems with them falling out). If the manual is to be believed, this makes adjusting the valve clearances a much bigger job as on the revision 3 it involves removing the camshafts (might as well replace the timing belt whilst you're at it).
exhaust valve clearance increased by 0.08 mm (probably. valve clearances is one question I'd like answered direct from Japan. They are probably the same as the UK GT4s, but it would be nice to be sure).
oil pan changed from a one piece pressed steel part to a two piece affair, the upper half being aluminium, the lower half being pressed steel.
No. 1 compression ring now described as 'stainless steel' in GT4 manual/supplement instead of just 'steel'. Oil ring is described as 'stainless steel' instead of 'a combination of steel and stainless steel'. No. 2 compression ring remains described as 'cast iron'.
idle speed perhaps slightly reduced (need to check this out on a rev 1 or 2 car, my stickers say 750 rpm, I've a feeling rev 1 & 2 was 800 rpm).
exhaust part numbers changed. Revision 2 part number for the front pipe is superceeded by the revision 3 front pipe part number. Back-box part numbers different. Unknown to me whether they are actually different.
Coolant drain plug added on cylinder block (on older engines the manual says to disconnect a by-pass hose when changing coolant).
(Please note a lot of significant chassis improvements were already made for revision 2, although revision 3 ABS is probably much improved including the addition of an accelerometer.) Its rumoured that the USA never got the later improved engines, even though the american version of the MR2 turbo was sold there until 1996 (in very small numbers after 1994 though).
Chassis number SW20-0087386 and onwards have the newer engines according to the Toyota Electronic Parts Catalogue for the Japanese MR2 turbos.




Differences between Japanese revision 3 MR2 turbo engine and UK ST205 (1994 onwards) Celica GT4 engine
Both engines are referred to by the same code: 3S-GTE. (However this doesn't mean a lot since they've been making the 3S-GTE since the 1980s, in various forms with various power outputs for various cars.)
The following parts have identical part numbers on the two cars:

piston
con rod assembly
crank shaft
cam shafts (both of them)
block sub assembly (sorry I forget exactly what this means, just the actual block itself probably)
clutch friction plate
Some part numbers seemed to be different such as:
turbo charger (but not on the Japanese ST205).
engine ECU (obviously, although the connector pin-out is almost identical. Probably the same PCB programmed with different software and with perhaps some components left unpopulated).
complete engine assembly (ST205 is 19000-88508, MR2 is 19000-88509)
head sub assembly
short block assembly
intercooler (obviously!)
But I think you'll agree that the part numbers that match mean they are very similar engines, if not identical. (Bear in mind it does seem that Toyota may use different part numbers for identical parts). Other information that I've come across seems not to contradict this view except it does sound like the UK ST205 probably uses a steel exhaust turbine in the turbocharger though where as both the Japanese MR2 turbo and the Japanese ST205 use ceramic. Also, the UK ST205 probably has EGR (Exhaust Gas Recirculation, an emissions reduction thing), the Japanese MR2 turbo doesn't.
Almost none of the part numbers in the revision 3 MR2 turbo engine were shared with the revision 2 engine. Revision 1 and 2 engines likely have a similar relationship with the engines of the UK ST185 Celica GT4 as revision 3 does with the UK ST205.




Differences between Japanese and UK MR2s
An extensive list is yet to be produced, but most obviously its the level of trim and extras. Hifi systems are different, seats are different, Japanese have climate control and better ABS, that kind of thing. As far as I know all MR2s were made in the same factory, so therefore plain economics dictate that most of the mechanical parts are the same. Brake disks have the same part number, brake pads look identical, rest of brake parts are likely to be identical too. Wheels are identical. UK cars might not have the same shock absorbers due to the lighter weight of their NA engine, not to mention rumours of the ride being a bit softer in UK cars. Headlamps are slightly different but are interchangeable. On the whole though the chassis are pretty similar; claims by insurers or UK Toyota dealers that all the parts are different are pretty much untrue.



Difference between Japanese GT and GTS models
GT seems to have steering front fog lamps, electrically folding mirrors and some parts of the interior covered in dead cow as standard instead of as options. i.e. GT and GTS are pretty much the exact same car.



Differences between revision 1 and revision 2 chassis
Diameter of front brake disks increased from 258mm to 275mm. Thickness increased from 25mm to 30mm. Allowable wear increased from 1mm to 2mm.
Diameter of rear brake disks increased from 263mm to 281mm. Thickness increased from 16mm to 22mm. (Allowable wear remains at 1mm.)
Front tyres changed from 195/60 14 to 195/55 15. Rear tyres changed from 205/60 14 to 225/50 15. Compact spare also changed due to bigger brakes.
Suspension/steering geometry changed.
Front strut bar changed so that caster is no longer adjustable.
Speedo changed to use an electronic sender and not a mechanical cable.

[mistertwo_2008_uk]

check your Chassis number for conclusive proof


MR2 Chassis Numbers

Revision 1 - December 1989 to December 1991
Chassis JT163SW2000000001 to JT163SW2000059265

Revision 2 - December 1991 to November 1993
Chassis JT163SW2000059266 to JT163SW2000087385

Revision 3 - November 1993 to June 1996
Chassis JT163SW2000087386 to JT163SW2000106662

Revision 4 - June 1996 to December 1997
Chassis JT163SW2000106663 to JT163SW2000110780 (Approx)

Revision 5 - December 1997 to August 1999
Chassis JT163SW2000110780 (Approx) to End of Production

-------------------------------------------------------------------------------------------------------

12/89 -> 12/91 Rev1
12/91 -> 10/93 Rev2
10/93 -> 10/95 Rev3
10/95 -> 10/97 Rev4
10/97 -> 03/00 Rev5


taken from = http://toyotaownersclub.com/forums/inde ... opic=11619


hope this helps....

Daz

[jim-mapps]

Wow thanks for the detail

Just won it on ebay. 460 notes, by no means mint and I suspect a leaky T-bar but so cheap!!!

[JohnnyC]

It's a UK rev1

[jim-mapps]

Sweet, ta. Now to find out as much as I can about them

[JohnnyC]

You can start by adjusting that handbrake

[Harry]

Informative article Daz.

[Tiny]

Wow thanks for the detail

Just won it on ebay. 460 notes, by no means mint and I suspect a leaky T-bar but so cheap!!!

Vaseline and lots of it = no leaks

[RobCrezz]

Wow thanks for the detail

Just won it on ebay. 460 notes, by no means mint and I suspect a leaky T-bar but so cheap!!!

Vaseline and lots of it = no leaks

also, look up the clingfilm + Black rubber sealant method. Works really well.

[jim-mapps]

aye I've heard the sealant and cling film method before, tried it on my mk1 but didn't really put enough offort in + twas raining at the time I tried it so probs rushed it a bit, explaining why it didn't work!

Handbrake... go on then, where will I find adjustment for that?

[RobCrezz]

aye I've heard the sealant and cling film method before, tried it on my mk1 but didn't really put enough offort in + twas raining at the time I tried it so probs rushed it a bit, explaining why it didn't work!

Handbrake... go on then, where will I find adjustment for that?

Yeah best to do it when its not raining haha. Use plently as you can always trim off whats not needed when it drys.

[dawolf]

Just want to add rev 3's don't all have ABS. My GT-S doesn't have it and my mate's didn't either.

[Greddy-Matt]

^^^ Neither does my GT-S

[Razor04]

My GTS aint got it

[craig]

My GTS aint got it

Mine either.....

[jim-mapps]

So... I've been trying to find out which engine is in this motor but it seems to have a grey area surrounding it. Also, Wiki reckins 1992 is rev2 country?

Can anyone here tell from the picture above?