Opel Insignia 2.0 CDTI oil pump seal

Sleeve—a gasket connecting the oil pump to the suction pipe, made of high-quality aluminum

What is a snakegate seal?

This type of seal is a sleeve made of high-quality aluminum that connects the oil pump to the crankshaft. It is known as the crankshaft seal, or O-ring, located between the oil pump and the crankshaft assembly in Opel Insignia vehicles equipped with 2.0 CDTI diesel engines. Its purpose is to seal this connection. The oil pump seal is a component prone to failure. Over time, it hardens and allows oil to leak, causing a drop in lubrication pressure. This situation can quickly lead to engine seizure. The first sign of an oil pump seal failure that we may notice in the car is a low oil pressure warning that appears periodically, most often immediately after starting the engine. The message appears on the on-board computer screen. Later on, the oil warning light stays on for longer periods. Under no circumstances should these signs be ignored, as they usually indicate an impending or ongoing problem.

Why choose an ADITECH gasket?

The ADITECH aluminum sleeve replaces the highly defective factory oil pump seal. It creates a durable connection between the oil pump and the oil pan. The kit includes O-rings made of Viton, a material resistant to high temperatures and engine oil. Installation involves removing the old seal and installing the new sleeve in its place.

The kit includes:

1 x sleeve – oil pump seal (aluminum);
3 x Viton O-rings to seal the sleeve;
1 x Viton O-ring to seal the oil level sensor plug;
    2 x Viton O-rings for sealing the breather inside the oil pan;
    1 x Viton O-ring for sealing the breather on the outside of the oil pan.

The colors of the O-rings may differ from those shown in the photos depending on availability.

Application:

Opel Insignia A (model years 2009–2017)
Opel Cascada (model years 2013–2018)
    Opel Astra J (model years 2009–2015)
Opel Zafira C (model years 2012–2018)

with engines bearing the following codes:

2.0 CDTI, A20DTC / A20DTL, 81 kW (110KM)
2.0 CDTI, A20DTJ / A20DT, 96kW (131KM)
2.0 CDTI, A20DTE, 88kW (120KM)
2.0 CDTI, A20DTE, 103kW (140KM)
2.0 CDTI, A20DTH, 118kW (160KM)
2.0 CDTI, A20DTH, 120kW (163KM), from 07/2013
2.0 CDTI, A20DTR, 140kW (190KM)
2.0 CDTI, A20DTR, 143kW (195KM), from 2012

The modified part was used in the engine designated B20DTH (LFS) 2.0 CDTI 170 KM equipped with the AdBlue system. The difference between them stems from a different design of the connection between the oil pump assembly and the oil suction line.

OE/OEM part numbers: 55589549, 646125
 

The aluminum oil pump suction hose gasket for the Opel Insignia 2.0 CDTI replaces the factory part, which hardens over time and loses its seal. A drop in lubrication pressure can lead to engine seizure. Code: AT-EPO-T006, EAN: 5904276580080, price: 45.00 PLN.

What does the oil suction hose seal do in the Opel Insignia?

The oil suction hose seal in the Opel Insignia seals the connection between the oil pump and the oil suction hose—that is, the suction line in the oil pan. In this kit, the classic rubber seal is replaced by an aluminum oil suction hose sleeve with Viton O-rings. In practice, you get a stiffer component that is more resistant to aging.

The aluminum sleeve is lightweight, smooth, and doesn’t bend when held in your hand. The Viton O-rings are springy and offer even resistance when inserted, making it easier to feel when they’re seated correctly.

The product’s key features translate into tangible benefits:

• aluminum stabilizes the connection
• Viton retains its properties in hot oil
• the replacement eliminates the defect in the factory gasket
• simple installation reduces repair time

How to identify a malfunction in the 2.0 CDTI?

A malfunction is often indicated by a warning message that appears immediately after startup. A faulty oil pan gasket can then trigger a low oil pressure warning, and later the oil warning light stays on for increasingly longer periods. In a 2.0 CDTI engine, this symptom often indicates a leak between the oil pump and the oil pan.

The original part operates continuously in hot oil, so over time it hardens and loses its elasticity. A leak then develops at the connection between the oil pump and the oil pan, which reduces lubrication pressure. The symptoms usually worsen over time.

If you delay the replacement, the risk of engine seizure increases. In the case of a typical crankshaft seal failure in the Opel Insignia, a quick response is simply cheaper than a major repair.

What’s included in the kit, and how is it installed?

Installation is simple, as the replacement involves removing the old seal and installing the new sleeve. The kit includes not only the sleeve itself but also seals from the same area, including the crankcase breather seals. A small O-ring from this location can later force you to disassemble the engine again, which is why this complete set makes sense.

The set includes:

• 1 sleeve – aluminum “dragon” gasket
• 3 Viton O-rings for sealing the sleeve
• 1 Viton O-ring sealing the oil level sensor plug
• 2 Viton O-rings sealing the breather inside the oil pan
• 1 Viton O-ring sealing the breather on the outside of the oil pan

The colors of the O-rings may differ from those shown in the photos. The material and function remain the same. The sleeve installs without any modifications and without forcing it into place.

Which models and engines is the oil pan gasket compatible with?

The kit fits Opel vehicles with a 2.0 CDTI engine that have a problem with the oil pan gasket. The parts are manufactured by ADITECH, and the OE/OEM numbers are 55589549 and 646125. It is recommended to verify compatibility based on the model, model year, and engine code.

Applications include:

• Opel Insignia A 2009–2017
• Opel Cascada 2013–2018
• Opel Astra J 2009–2015
• Opel Zafira C 2012–2018

The kit is compatible with the following engines: A20DTC and A20DTL – 81 kW, 110 KM; A20DTJ and A20DT – 96 kW, 131 KM; A20DTE – 88 and 103 kW, 120/140 KM; A20DTH – 118 kW, 160 KM, and 120 kW, 163 KM as of July 2013; A20DTR – 140 and 143 kW, 190/195 KM since 2012. The improved part was also used in the B20DTH LFS 170 KM with AdBlue, but the earlier version has a different design for the connection between the oil pump and the pump housing. This is important when selecting parts for newer versions.

FAQ

What are the benefits of an aluminum sleeve with Viton O-rings?

It stabilizes the connection between the pump and the suction manifold; it does not harden like the factory rubber, and the Viton O-rings are resistant to hot oil. It facilitates installation and reduces the risk of leaks and pressure drops.

How can you tell if the seal is damaged, and what are the risks of delaying repairs?

After startup, a low-pressure warning may appear, and the oil warning light may stay on longer. A leak reduces lubrication pressure; without replacement, the risk of engine seizure increases.

How can I check if the kit fits my car and engine?

The kit is designed for 2.0 CDTI engines (see the article for a list of models and codes). Manufacturer: ADITECH, OE 55589549 and 646125; always verify compatibility based on the model, model year, and engine code.