Guide to the Best Cylinder Head Pressure Tester Machine

Comec VPT130 the best engine block and cylinder head pressure testing machine

In this article, The Ultimate Tooling presents you with a technical guide to what we believe are the best pressure tester for cylinder head and engine block currently available on the automotive market.

Comec VPT190 Engine Crack Detection Machine

Comec VPT190 Engine Crack Detection Machine

The hydraulic cylinder head and engine block testing process

Cylinder heads and blocks leak testing is an essential operation to ensure the reliability and safety of endothermic engines.
This process is particularly important in identifying any cracks or fractures that could affect the proper functioning of the engine.

There are two main methods of detection of fissures and cracks, which differ in the way they operate, as described below.

In both systems, the initial preparation phase is the same and consists of sealing the cooling circuit with rubber pads placed on the coolant passages and held in place by a thick plexiglass pressure plate secured by special tie rods.
The purpose of this operation is to ensure that the circuit is completely hermetically sealed and to avoid any abnormal leaks that would distort the test.

At this point, the two test methods differ by following different operating procedures.

In the first method, hot water is injected into the cylinder head, and once the circuit is filled and heated, the water hose is replaced with a compressed air hose and pressurized.
If there is a rupture in the head, a series of air bubbles will escape from the rupture and at the same time the pressure gauge will indicate a significant drop in pressure.

In the second method, the cylinder head, previously connected to a compressed air hose controlled by a air pressure regulator, is immersed in a tank filled with hot water and then pressurized by the introduction of compressed air.

According to the studies and results obtained in the field, the second method is much more effective and precise than the first one and is the preferred solution of the most demanding and professional engine rebuilders.

This is because the heat of the water contained in the tank is greater and more enveloping, diluting the material more evenly and making it easier to detect any leaks in the circuit.
In addition, cracks are more easily detected due to the air bubbles that escape and are clearly visible in the water.

Starting from this premise, which illustrates the two main methods used for hydraulic pressure testing of engine heads, the choice of the best and most popular product among specialists in the field can only fall on the models of cylinder head pressure tester produced by Comec, which use precisely the immersion method.

Comec VPT130, VPT160 and VPT190: the best cylinder head pressure testing machine

When choosing a machine or equipment for your engine remanufacturing workshop, it is essential to rely on established products and brands, which is why we have decided to present what are undoubtedly the best cylinder head pressure tester.

As already mentioned, we are referring to the 3 models produced by Comec, a leading company in the field of machine tools for automotive repair, always at the forefront of technological solutions and constantly attentive to the needs of modern engine rebuilders.

The range of cylinder head crack detector machine offered by Comec, offers precise and efficient control in leak testing, for most cylinder head pressure testers and engine blocks on the market.

All 3 models are characterized by precision and ease of use, built with high quality materials and equipped with interesting technological devices.

The tank in which the head is immersed is made entirely of stainless steel to prevent possible corrosion and is insulated with special thermal insulation material to prevent heat loss and consequent water cooling.

In addition, the advanced thermal management with programmable electronic timer ensures uniform and optimized water heating by means of 2 powerful independent heating elements.

All models are equipped with a sturdy head housing cradle that can be moved via a convenient joystick and rotated 360 degrees for easy inspection of any point.

A convenient and intuitive touch screen control panel is used for complete management of heating parameters.

Each version is equipped with a complete set of accessories, such as parallels supports, plexiglass plates, rubber sheets and more, to make the machines immediately operational and functional for quick and easy detection of fissures.

Comparison of the technical characteristics of VPT130, VPT160 and VPT190

Let us now look at the characteristics and some technical data of the three variants of the Comec Cylinder Head Pressure Tester in order to highlight the similarities and the significant differences.

In terms of capacity, the VPT130 can handle heads up to 1200×350×300 mm, while the VPT160 and VPT190 can handle slightly larger heads, with a maximum capacity of 1350×410×410 mm and 1350×460×410 mm respectively.

For tank capacity, the VPT190 offers the largest capacity with 710L, followed by the VPT160 with 580L and the VPT130 with 490L.

In all three versions, the support cradle has a maximum stroke of 550 mm, a rotation speed of 4 rpm and an up/down speed of 60 mm/sec.

Regarding the power of the electric heating elements, all models are equipped with two heating elements of 4.5 kW each, which ensure a fast and uniform heating of the water.

The working temperature is variable from 30° to 90°C on all three models, providing operational flexibility to meet specific process requirements.

Size and weight vary slightly between the models, with the VPT130 being the most compact and lightweight, followed by the VPT160 and finally the VPT190, which is the largest and heaviest of the three.

In summary, while the VPT130 is suitable for smaller cylinder heads, the VPT160 and VPT190 offer greater capacity for larger engines, with the VPT190 standing out for its larger capacity and size, ideal for more demanding applications.

Comparison table

To better understand and compare the various technical features, we have summarized all the different specifications in the table below.

Max. engine head capacity1200×350×300 mm1350×410×410 mm1350×460×410 mm
Tank capacity490 Lt580 Lt710 Lt
Max. cradle travel550 mm550 mm550 mm
Cradle rotation speed4 rpm4 RPM4 RPM
Cradle up-down speed60 mm/sec60 mm/sec60 mm/sec
Heating elements power2×4,5 kW2×4,5 kW2×4,5 kW
Adjustable working temperature30°÷90° C30 ÷ 90° C30 ÷ 90° C
Hydraulic power unit motor0,75 kW0,75 kW0,75 kW
Cradle gear motor0,25 kW0,25 kW0,25 kW
Dimensions180×105×170 cm195×110×170 cm195×110×175 cm
Weight400 Kg510 Kg650 Kg


Having provided this comprehensive technical overview of the Comec VPT130, VPT160 and VPT190 products, we have provided all the useful elements to help engine rebuilders choose the best solution for cylinder head testing.

If you are a modern, innovation-oriented engine rebuilder who does not accept compromises or second-rate equipment, Comec’s engine head crack tester represent the best options the market offers today.

For any technical and commercial information regarding Comec VPT130, VPT160 and VPT190 cylinder head crack detector machine, please contact us using the button below.

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