11129092 Valve Guide | Genuine Volvo Penta Part

🔧 Product Description

A genuine Volvo Penta cylinder-head valve guide used across a broad range of Volvo 5-litre, 7-litre, 10-litre and 12-litre diesel engines. The precision-machined guide supports the valve stem in the cylinder head, maintains correct valve alignment and transfers heat from the valve into the cylinder-head casting. Aftermarket catalogues normally classify 11129092 as the exhaust-valve guide, although the parts list for your engine should always be checked because some engine variants use the same guide specification in more than one valve position. Approximate dimensions are 18mm outside diameter, 11mm bore and 66mm length.

🚤 Compatibility

• Engine Family: TD, TWD, TMD, THD, DH, TAMD, TAD
• HP Range: Approximately 100-650 HP
• Year Range: Approximately 1960s - 2000s

Full model list at the end of this description.

⚙️ Key Features

• OEM Volvo Penta part number 11129092
• System group: Engine
• Net weight: 0.075 kg
• Supersedes part numbers 11129091 and 1545135, with 1545135 having itself replaced 421297
• Sold individually - multiple guides are required per cylinder head
• Fits TD100, TD120, TD121, TMD, THD, TAMD, TWD and TAD series marine, industrial and genset diesel engines
• Engine type: Volvo inline 4- and 6-cylinder marine, industrial and heavy-duty diesel

🔌 Function

The valve guide is pressed into the cylinder head and supports the inlet or exhaust valve stem, holding the valve in precise alignment with its seat as it opens and closes. It also conducts heat away from the valve stem into the cylinder head and controls the amount of oil reaching the stem.

⚠️ Common Signs of Failure

• Blue exhaust smoke from oil being drawn down worn guides into the combustion chamber
• Excessive lateral play felt when rocking the valve stem in the guide
• Increased oil consumption with no external leaks
• Noisy or tapping valve train and uneven valve seat wear patterns
• Poor compression or valve seat burning caused by a valve no longer seating concentrically

🛠️ Service Notes

• Guides are an interference fit: bring the head to the temperature the workshop manual specifies and press the new guide in with a stepped drift, lightly oiled, rather than driving it in cold
• Fit to the depth or protrusion the manual gives for your engine, and support the head properly so the boss is not cracked
• Ream or size the guide after fitting — pressing distorts the bore, and stem-to-guide clearance must be brought back to the manual's figure
• Check the result by oiling the stem and letting the valve fall through the guide under gravity: it should descend smoothly and evenly, with no tight spot anywhere in its travel
• Recut or lap the seats after guides are changed, since the guide sets the valve's axis, and renew the valve stem seals at the same time

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 11129092 → Supersedes 11129091

OEM / Related Numbers

• 1545135 earlier number superseded by this part
• 11129091 earlier number superseded by this part
• 421297 related reference
• 7421297 related reference

Other-Brand OEM Numbers

• TRW Engine Components: 81-47124
• MAHLE: 037FX31931000

Aftermarket / Verified Equivalents

• 11V9092 aftermarket formatted reference
• VV3095-396 aftermarket reference
• DT Spare Parts: 2.10288
• Freccia: G3312
• ATP: EVG-5135
• Riosulense: VV3095-396
• MK Parts: 11V9092
• SLP: VG-135

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta TAMD122A, TAMD122A/C, TAMD122D, TAMD122P-A, TAMD122P-B, TAMD122P-C
• Volvo Penta TD121G-87, TD121CHC, TD121CRC
• Volvo Penta THD102KB, THD102KD, THD102K-KB
• Volvo Penta TAD1030V, TAD1030VE
• Volvo Penta TAD1230G, TAD1230V
• Volvo Penta TAMD102A, TAMD102D
• Volvo Penta TWD1210G, TWD1210V
• Volvo Penta TWD1211V, TWD1211G
• Volvo Penta TWD1230ME, TWD1230VE
• Volvo Penta DH10A
• Volvo Penta TAD121CHC
• Volvo Penta TAD1231GE
• Volvo Penta TAD1232GE
• Volvo Penta TAMD103A
• Volvo Penta TAMD121D
• Volvo Penta TD1210G
• Volvo Penta TMD100C
• Volvo Penta TMD102A
• Volvo Penta TMD121C
• Volvo Penta TMD122A
• Volvo Penta TWD1031VE
• Volvo Penta TWD1231VE