Volvo T5 Whiteblock Rebuild, common faults & everything you need to know
The complete guide to Volvo's turbo five. From the PCV system to 650-horsepower builds - with workshop prices.
The whiteblock five carries most of Volvo's turbo heritage from the 90s and 00s. Aluminium block and cylinder head with a DOHC 20-valve head and a forged steel crankshaft that is next to indestructible. From the 850 T5 to the S60R - Robert has been building and reconditioning these engines for 30+ years. We do everything from cylinder head reconditioning till complete engine reconditioning with a 12-month warranty.
The T5 Whiteblock at a glance
All dimensions and data for the T5 Whiteblock series. Shared specifications for the B5234T/B5244T/B5254T family.
| Variant | Volume | Power | Torque | Turbo | Note |
|---|---|---|---|---|---|
| B5234T Turbo | 2.3L | 225 hk | 300 Nm | TD04HL-15G | 850 T5 original |
| B5234T3 Turbo | 2.3L | 240 hk | 330 Nm | TD04HL-16T | 850R, S70/V70 T5 |
| B5244T3 LPT | 2.4L | 200 hk | 285 Nm | TD04HL-13T | S60/V70 2.4T |
| B5244T5 HPT | 2.4L | 260 hk | 350 Nm | K24 | S60/V70 T5 (P2) |
| B5254T LPT | 2.5L | 193 hk | 270 Nm | TD04HL | S70/V70 2.5T |
| B5254T2 Turbo | 2.5L | 211 hk | 320 Nm | TD04HL | XC70/V70 2.5T (VVT) |
| B5254T4 HPT | 2.5L | 300 hk | 400 Nm | K24-7400 | S60R / V70R |
Torque specs
Verified against the Volvo 850 T5 factory manual (B5234FT, pages 850T5-p21). All values apply to oiled threads. The whiteblock uses angle torque (TTY) throughout - stretch bolts are replaced on disassembly.
Cylinder head & valvetrain
Engine block & bottom end
Timing belt & timing
Turbo
Intake, exhaust, other
NOTE - Head bolts: A 4-stage TTY procedure (27 Nm, 47 Nm, +90°, +90°). M11 stretch bolts - always replace them on disassembly. Coat the threads with 30-weight engine oil before tightening. Never reuse.
NOTE - Con-rod bolts: TTY procedure 27 Nm + 90°. Stretch bolts - always replaced on disassembly. Lubricate the threads with engine oil.
NOTE - Two-piece cylinder head: Use ONLY Volvo sealant P/N 1 161 059-9 between the upper and lower head halves. Apply it with a roller. The M7 retaining bolts (17 Nm) are tightened from the centre outwards with press tool 5454. This is T5-specific - no B230 or other Swedish engine has a two-piece cylinder head.
NOTE - Harmonic damper: The extremely high 180 Nm torque requires holding tool 9996 against the harmonic damper bolt holes (not the pulley). Turbo variants add a 60° angle turn on top of the 143 Nm base torque.
NOTE - Main bearing housing (ladder frame): The intermediate section is a single aluminium casting with 14 bolts in mixed M10 + M8 + M7 sizes (not separate main bearing caps like the B230). A 3-stage TTY: 20 Nm, 60 Nm, +90°. Follow the tightening sequence per fig. 15.
Factory tolerances & wear limits
Original values from the Volvo 850 T5 factory manual (pages p22-p24).
The cylinder head in detail
The whiteblock has a 2-piece aluminium cylinder head - the upper part carries the camshafts, the lower part is bolted to the block. They are joined with Volvo sealant 1 161 059-9 and 17 Nm M7 bolts (tightened from the centre outwards). This design is T5-specific and is not found on the B230, M20 or M30.
Typical cylinder head damage on the T5:
- PCV-related oil pooling in the head: A faulty PCV system builds crankcase pressure that forces oil past the seals and fills the upper head half with oil. Must be fixed BEFORE cylinder head reconditioning.
- Camshaft bearing wear: The radial clearance of the aluminium bearings typically increases after 200 000+ km, especially with PCV-related oil starvation. Measure against 0,071 mm max.
- Upper/lower head seal leak: The sealant between the halves ages and hardens. It shows up as an oil leak along the side of the head. It requires splitting, cleaning and a fresh application of 1 161 059-9.
- Valve guide wear: Most common on the exhaust side. Symptoms: blue smoke on cold start, oil consumption. Measure against 0,07 mm max.
- Valve seat recession: An aluminium head with pressed-in seats can develop seat recession when overheated. Check the valve margin (min 1,0 mm).
Common faults on the T5 Whiteblock
This is what we see most often when a whiteblock five comes in. The PCV system is by far the most common culprit.
The PCV system fails
Very common • High- Symptoms
- Oil spread across the engine bay (especially under the spark plug cover), blue/white smoke, hunting idle, a smell of oil through the ventilation.
- Cause
- The diaphragm and hoses in the PCV system clog and collapse, creating crankcase pressure that forces oil past every seal. Must be fixed BEFORE new gaskets are fitted.
Timing belt failure (interference engine)
120 000 km • Critical- Symptoms
- The engine stops suddenly, will not start, or suffers serious damage with bent valves and damaged pistons.
- Cause
- The whiteblock IS an interference engine. Timing belt failure = the valves hit the pistons. Replace the timing belt + water pump + tensioner every 120 000 km or 5 years.
Turbo failure
150 000+ km • High- Symptoms
- A whistle, oil smoke, lost boost, axial play in the turbo shaft.
- Cause
- Oil starvation from a blocked oil feed line (often PCV-related), or normal bearing wear. The turbo return line gasket is a common leak point.
ETM fault (P2 platform, pre-2003)
Common • High- Symptoms
- Jerky throttle response, limp mode, engine warning light, sluggish turbo response.
- Cause
- Internal contact wear in the electronic throttle body. A documented design flaw on the S60, V70, S80, XC70 before 2003. A revised replacement part is available.
Oil leak (camshaft seals)
100 000+ km • Medium- Symptoms
- Oil dripping from the back of the engine, oil on the exhaust manifold (a smell of smoke), visible oil around the camshaft sensor.
- Cause
- The rear camshaft seals age. Made much worse by a faulty PCV system. Fix the PCV first.
Cylinder bore & crankshaft wear (boost-loaded)
250 000+ km • High- Symptoms
- Rising oil consumption, blowby, knocking from the bottom end under boost. Made worse by previous detonation or ring land damage.
- Cause
- The aluminium block with cast liners wears over time on boost-loaded T5s. If damaged, it needs either new liner installation or dry sleeves.
T5 Whiteblock Rebuild Prices
Price ranges based on a 5-cylinder inline whiteblock with a DOHC 20-valve head. Aluminium block with cast cylinder liners. All prices excl. VAT and parts.
Cylinder head reconditioning
Bottom end
Full rebuild
Performance
NOTE: The T5 Whiteblock is a 5-cylinder engine with a DOHC cylinder head (20 valves) and an aluminium block. The final price depends on the engine's condition, variant and any performance upgrades. Contact us for an exact quote.
Tune the T5 Whiteblock
The whiteblock five is one of the most popular turbo platforms in Scandinavia. A forged steel crankshaft, Mahle pistons and a cylinder head that flows well straight from the factory.
- 1
ECU remapping
Reflashing the engine management - see our ecu remapping. The simplest upgrade - +20-40 hp straight away with no mechanical work.
260-340 hk - 2
Bolt-ons + remap
Downpipe, intercooler, intake, ECU remapping. The most popular step - a big power gain without touching the internals.
280-330 hk - 3
Turbo upgrade
TD04HL-19T/-20T hybrid (see turbo upgrade), larger injectors, fuel pump, 3" exhaust system. Standard con-rods handle up to ~400 hp.
350-420 hk - 4
Forged internals + large turbo
Forged con-rods + pistons, ARP bolts, a built cylinder head - requires cylinder boring and cylinder head resurfacing. A Holset HX35 or aftermarket, a standalone ECU.
500-650+ hk
T5 VVT Camshaft Profiles
We grind our own camshaft profiles for the T5 Whiteblock from a blank, on our own camshaft grinder. Every shaft ships with a complete grind report. All profiles are VVT-compatible and designed for the whiteblock 5-cylinder engine - the DOHC head requires separate intake and exhaust camshafts.
The 5-cylinder engine's longer camshaft and the DOHC design make manufacture more complex than on a 4-cylinder shaft. Original base circle on every profile.
The MT series VVT-compatible · Original base circle
| Profile | Stage | Application | Working range | Duration / Lift |
|---|---|---|---|---|
| MT1Street | Standard | Daily driving | 800-6 000 v/m | 246° / 9.4 mm |
| MT2Street+ | Stage 1 | Sport / cruise | 1 000-6 400 v/m | 254° / 10.0 mm |
| MT3Race | Stage 2 | Road racing | 1 600-6 800 v/m | 262° / 10.6 mm |
| MT4Race | Stage 2 | Road racing | 2 200-7 200 v/m | 270° / 11.2 mm |
| MT5Race+ | Stage 3 | Sprint / track | 3 000-7 600 v/m | 278° / 11.8 mm |
| MT6Drag | Stage 3+ | Track only | 3 800-8 000 v/m | 286° / 12.4 mm |
Questions & answers about the T5 Whiteblock
What we hear most often from T5 owners.
What does it cost to rebuild a Volvo T5?
A cylinder head reconditioning costs roughly 7 500 - 10 000 kr (labour), a complete engine reconditioning roughly 28 000 - 45 000 kr. On top of that come parts. The 20-valve head requires more work than a simpler 8-valve head.
What are the most common faults on the T5 Whiteblock?
The PCV system is by far the most common problem. It typically fails at 80 000-120 000 km and causes oil leaks, smoke and rough running. Next most common are turbo problems and timing belt-related damage.
Is the T5 Whiteblock an interference engine?
Yes, all T5 Whiteblock variants are interference engines. If the timing belt breaks, the valves hit the pistons, causing serious engine damage. Replace the timing belt every 120 000 km or every 5 years - always together with the water pump and tensioner.
How much power can a T5 handle?
The standard con-rods handle ~350-400 hp with the right remap and fuel system. The crankshaft (forged steel) is extremely strong. With forged con-rods + pistons, a built cylinder head and a big turbo: 650+ hp.
Which T5 variant is best to build on?
The B5234T/T3 (2.3L, 850 T5/R) is the classic base - easiest to work with and the largest aftermarket support. The B5254T4 (S60R/V70R, 300 hp) has stronger internals from the factory but is more expensive to rebuild.
How long does a reconditioned T5 last?
With a properly executed rebuild and regular maintenance: 200 000+ km. The aluminium block with cast cylinder liners is wear-resistant, and a quality rebuild with the right tolerances gives in practice a new engine.
Do you have a T5 that needs looking at?
Call us directly or send in a quote request. We reply within 24 hours.