# Compression Tester Rockforce RF-907G09 for Petrol Engines 0–21 bar, 4 Adapters

**URL:** https://aio.lv/en/product--rockforce-rf-907g09--12055463
**Data updated:** 2026-03-12 19:39 (EET)
**Category:** Miscellaneous repair tools
**Manufacturer:** Rockforce
**Manufacturer code:** RF-907G09
**EAN:** 5905101335028
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 23.49 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 19.41 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--rockforce-rf-907g09--12055463

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 13.07.2026 | free |
| Pickup points | 16.07.2026 | 1.99 EUR |
| Courier delivery to door | 16.07.2026 | 4.99 EUR |

## Summary description

Mechanical compression tester Rockforce RF-907G09 designed for petrol (gasoline) engines, measuring pressure from 0 to 21 bar. Supplied with four adapters for different spark plug or cylinder fittings, it is used to diagnose cylinder compression, detect leakage, worn rings or valves, and assess engine health during maintenance and troubleshooting.

## Long description

The Rockforce RF-907G09 compression tester for petrol engines is a mechanical diagnostic tool designed to measure cylinder pressure in the range of 0–21 bar. Supplied with four adapters to fit common spark plug and cylinder thread types, this tester helps assess combustion chamber sealing and engine mechanical condition. It is suitable for workshop use, roadside checks, and routine maintenance to detect low compression caused by worn piston rings, leaking valves, blown head gaskets, or other faults affecting engine performance.
Advantages
The mechanical gauge offers a clear analog display with a broad measuring range up to 21 bar, enabling detection of both minor and major compression issues. A set of four adapters increases compatibility with various petrol engine spark plug and cylinder thread sizes, reducing the need for additional fittings. The robust construction and straightforward mechanical operation make the tester reliable in typical workshop environments without requiring power, batteries, or electronic calibration.
Suitable for
 Measuring static cylinder compression on petrol (gasoline) engines
 Diagnosing worn piston rings, leaking valves, or head gasket failures
 Pre-purchase engine condition checks and routine maintenance
 Workshop and mobile mechanics performing engine diagnostics
Key specifications
 Measurement range: 0–21 bar
 Type: Mechanical analog compression tester
 Includes: Gauge and four adapters for common spark plug / cylinder fittings
 Connection: Threaded adapter fittings for direct cylinder access
 Construction: Durable metal gauge body with protective casing
How to use
Warm the engine to normal operating temperature, then disable ignition and fuel supply according to the vehicle manufacturer’s safety procedures. Remove the spark plug from the cylinder to be tested and screw an appropriate adapter from the set into the spark plug hole until it seats securely. Attach the tester to the adapter and hold the throttle open to allow maximum cranking air. Crank the engine several revolutions with the starter while observing the gauge; record the highest steady reading. Repeat the measurement for each cylinder and compare values to manufacturer specifications or between cylinders to identify relative differences.
Usage recommendations
Use consistent test conditions (engine temperature, throttle position, and number of cranks) for all cylinders and consult vehicle service data for acceptable compression values. If low compression is suspected, perform a wet compression test by adding a small amount of oil to the cylinder to help differentiate between worn rings and leaking valves or head gasket issues.

## FAQ

### How much does the Compression Tester Rockforce RF-907G09 0–21 bar cost, and is it available for purchase?

The price is 23.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 24 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 13.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Rockforce products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Rockforce service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

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