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T series engines

Most data copied from "Toyota Carina, Celica 1971-74 Autobook" (804).

The 2T engine is a pushrod, overhead valve engine with 4 inline cylinders.
The block is cast iron and the cylinder head is alloy.
Twincam versions (2T-G, 2T-GR, 2T-GEU, 3T-GTE, 4T-GTEU) use twin overhead cams in an alloy head.
All versions of the 2T can use unleaded petrol because all alloy heads have hardened valve seats.
Head gaskets can be shared between all versions (twincam can use gasket goop for timing cover).
Inlet manifold gaskets shared between all single cam versions.
Inlet manifold gaskets shared between all twincam versions.
Inlet manifold gaskets not shared between single cam and twincam versions.
Exhaust manifold gaskets shared between all versions.
Most versions use the same data except for timing.

Some info from Mike (alias Renegades)...
The full production of 2T twincam engines was started in October 1970.
Engines were produced to Toyota special order, with Yamaha supplying the heads initially.
Production run 2T twincam engines can be identified from the engine numbers.
All blocks to have the twin cam head had ID numbers commencing with 8.
Typically a 2T/2T-B engine number would be 0094490 while a 2T-G would be 8038332.
Many 2T-G racing engines went out without block numbers as the blocks were special castings
(extra ribbing for strength, reworked oil passageways).
Similarly the heads would not be numbered either.

More 2T info at www.tassie.net.au/~jar/2tg-info.html

Engine	T family, 80.0 x 70.0mm = 1407cc,
T	super (lead) fuel
T-C	uses EGR for low emmisions
T-U	uses TTC-C for low emmisions
T-D	super (lead) fuel
T-B	twin downdraft carbs, super (lead) fuel
T-BR	twin downdraft carbs, regular (unleaded) fuel

Engine	2T family, 85.0 x 70.0mm = 1588cc,
2T	super (lead) fuel
2T-C	uses EGR for low emmisions
2T-U	uses TTC-C for low emmisions
12T	uses TTC-L for low emmisions
12T-U	uses TTC-V for low emmisions
2T-B	twin downdraft carbs, higher compression
2T-BR	twin downdraft carbs, regular (unleaded) fuel
2T-G	twin overhead camshafts, twin sidedraft carbs
2T-GR	twin overhead camshafts, twin sidedraft carbs, regular (unleaded) fuel
2T-GEU	twin overhead camshafts, EFI and TTC-C

Engine	3T family, 85.0 x 78.0mm = 1770cc,
3T	super (lead) fuel, no emmissions controls
3T-C	uses EGR for low emmisions
3T-U	uses TTC-C for low emmisions
3T-EU	EFI, uses TTC-C for low emmisions
13T	uses TTC-L for low emmisions
13T-U	uses TTC-V for low emmisions
3T-GTE, 3T-GTEU	twin overhead camshafts, twin spark plugs, EFI, CT20 turbo (no intercooler)

Engine	4T family
4T-GTEU	road version, 1791cc, twin overhead camshafts, twin spark plugs, EFI, Toyota turbo
4T-GTEU	race version, 2090cc (89.0 x 84.0mm), twin overhead camshafts, twin spark plugs, EFI, KKK turbo

Common settings
Bore x Stroke	85.0x70mm (3.346x2.756")
Displacement	1588cc (96.9ci)
Compression ratio T-U	9.0
Compression ratio 2T	8.5
Compression ratio 2T-U	9.0
Compression ratio 2T-GEU	8.4
Compression ratio 12T	8.5
Compression ratio 12T-U	9.0
Compression ratio 3T-U	9.0
Compression ratio 13T	8.5
Inlet valve opens	16° BTDC
Inlet valve closes	54° ABDC
Exhaust valve opens	58° BBDC
Exhaust valve closes	12° ATDC
Inlet valve clearance - hot	0.204mm (0.008")
Inlet valve clearance - cold	0.178mm (0.007")
Exhaust valve clearance - hot	0.331mm (0.013")
Exhaust valve clearance - cold	0.305mm (0.012")
Timing 2T	10° BTDC at 600rpm
Timing 2T-C auto	5° BTDC at 650rpm
Timing 2T-C manual	5° BTDC at 750rpm
Firing order	1-3-4-2

Cylinder head
Gasket face max deviation	(0.002")
Gasket thickness	(0.06")
Valve seat angle	45°
Valve seat width of contact surface	(0.055")

Cylinder block
Gasket face max deviation	(0.002")
Tappet bore diameter	(0.8740"-0.8748")
Cylinder bore diameter	(3.346"-3.348")
Max wear limit	0.204mm(0.008")
Max taper or out of round limit	0.102mm(0.004")
Max bore diff between cylinders	0.020mm(0.0004")

Pistons
Standard outside diameter	(3.344"-3.346")
Cylinder to piston clearance	(0.0024"-0.0031")
piston temp when fitting gudgeon pin	20°C (68°F)
Compression ring #1 gap	(0.008"-0.016")
Compression ring #2 gap	(0.004"-0.012")
Oil control ring gap	(0.004"-0.012")
Compression ring #1 groove clearance	(0.0008"-0.0024")
Compression ring #2 groove clearance	(0.0008"-0.0024")
Oil control ring groove clearance	(0.0008"-0.0024")
Gudgeon pin diameter	(0.8661"-0.8665")

Connecting rods
Bend limit per 100mm (3.94")	(0.002")
Twist limit per 100mm (3.94")	(0.002")
Big end sideways movement	(0.006"-0.010")
Small-end to gudgeon pin clearance	(0.0004"-0.0016")
Big-end to gudgeon pin clearance	(0.0008"-0.0020")

Crankshaft
Max bend	(0.001")
End float	(0.003"-0.007")
Taper or out of round of bearing surfaces	(0.0004")

Last updated 27 Dec 2007