This says for compression and leak test. compression testing requires a gauge to at least 180 psi but gauge shown is far less. is picture wrong?

I would not use a leak down tester as a compression tester. A leak down test is very specific and gives complementary data to a compression test. If you want to do a compression test get the proper tool. When testing an engine of unknown quality I always do both tests since the testers are not expensive.

Can anyone tell me if the attachments will fit down the spark plug well of bmw r1200 gs motorcycles, 2010-2012?

Suitable for use on any petrol engine with 10, 12 or 14mm spark plugs.

Will this work on a jeep 4.0l? (2000 grand cherokee wj)

Suitable for use on any petrol engine with 10, 12 or 14mm spark plugs. Tester checks the amount of leakage in an engine cylinder & helps determine the source. Ideal for testing trucks & late model cars where clearance is minimal.

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

New Leak Down Tester Tu-21 Engine Cylinder Leak Tester Leakage Detector Engine Compression Tester Gauges Set

New Leak Down Tester Tu-21 Engine Cylinder Leak Tester Leakage Detector Engine Compression Tester Gauges Set

Product ID: 176580041

Details

Brand
ONDY
Item dimensions L x W x H
11.81 x 11.81
Material
Carbon steel
Number of Items
1
Thread Type
Npt

⛽Fits 10-14mm spark plugs

📏Measures 0-100% cylinder leakage

🛠️0-140 PSI pressure range

Description

🔧 Diagnose like a pro, fix like a boss – don’t let engine leaks slow your hustle!

COMPACT DURABLE DESIGN - Carbon steel build with compact dimensions fits tight engine bays, perfect for late-model cars and trucks.
PRECISION PRESSURE GAUGES - Dual gauges provide real-time input and leakage pressure readings up to 140 PSI for pinpoint diagnostics.
DIY MECHANICS BEST FRIEND - Easy setup with quick-connect couplers and clear leakage percentage readings to empower confident engine maintenance.
COMPREHENSIVE FAULT DETECTION - Detects worn piston rings, cracked cylinder walls, blown head gaskets, and valve leaks with surgical accuracy.
UNIVERSAL SPARK PLUG COMPATIBILITY - Works seamlessly with 10, 12, and 14mm spark plugs across most petrol engines.

The ONDY TU-21 Leak Down Tester is a precision diagnostic tool designed for professional-grade engine cylinder leak detection. Compatible with 10-14mm spark plugs and operating at 0-140 PSI, it accurately measures cylinder leakage from 0-100%, enabling detection of piston ring wear, valve leaks, cracks, and head gasket failures. Featuring dual pressure gauges and quick-connect fittings, this compact carbon steel set is ideal for DIY mechanics and professionals aiming to maintain peak engine performance and avoid costly repairs.

Specifications

ASIN	B08225M7VC
Best Sellers Rank	#1,140,937 in Automotive ( See Top 100 in Automotive ) #7,631 in Diagnostic, Test & Measurement Tools
Brand Name	ONDY
Customer Reviews	4.2 4.2 out of 5 stars (450)
Item Dimensions	11.81 x 11.81 x 1.97 inches
Manufacturer	ONDY
Material Type	Carbon steel
Number of Items	1
Number of Packs	1
Part Number	29-0629
Thread Style	Npt
UPC	016071508109
Unit Count	1 Count

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ravi S.

I loved the variety of products available. Will definitely shop again.

2 months ago

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Imran F.

Very reliable shop with genuine products. Will definitely buy again!

2 weeks ago

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

View all Trustpilot reviews