| 1 |
What is the difference between the upper gasket kit (4089360) and the lower gasket kit (4089361)? |
The upper gasket kit (4089360) contains all gaskets and seals needed for the top end of the engine — including cylinder head gaskets, valve cover gaskets, intake/exhaust manifold gaskets, and turbo gaskets. The lower gasket kit (4089361) covers the bottom end, including oil pan gasket, crankshaft seals, and connecting rod seals. For a full engine overhaul, both kits are required. |
| 2 |
Will this kit fit my QSK23 engine? |
Yes, the 4089360 upper gasket kit is designed specifically for all Cum mins QSK23 series 6-cylinder diesel engines. Please verify your engine model and serial number before ordering to ensure compatibility. If you have a QSK23-G3 or other variant, contact us for confirmation. |
| 3 |
How long does shipping take? |
Domestic orders typically ship within 1-2 business days and arrive within 3-7 days. International shipping via DHL/FedEx takes 5-10 business days. Express shipping options are available at checkout for urgent orders. |
| 4 |
What is the warranty on this gasket kit? |
All our QSK23 upper gasket kits come with a 12-month warranty from the date of installation. The warranty covers manufacturing defects and material failures under normal operating conditions. Improper installation or engine damage due to overheating is not covered. |
| 5 |
Do I need to replace head bolts when installing this gasket kit? |
Yes, we strongly recommend replacing cylinder head bolts when performing a head gasket replacement. QSK23 head bolts are torque-to-yield (TTY) bolts that stretch during installation and cannot be reused. Using old bolts can lead to improper torque and gasket failure. |
| 6 |
What is the proper torque sequence for the head gaskets? |
Always follow Cum mins official service manual specifications. Generally, QSK23 head bolts require a multi-step torque sequence: Step 1 — 150 N·m (110 lb-ft), Step 2 — 250 N·m (184 lb-ft), Step 3 — rotate additional 90 degrees. Always torque in the proper sequence from center outward. |
| 7 |
Can I install this gasket kit myself? |
While experienced mechanics can perform this installation, we recommend professional installation by a certified Cum mins technician. Proper torque procedures, surface preparation, and assembly techniques are critical for reliable sealing and long gasket life. |
| 8 |
What are the common signs that I need to replace my head gasket? |
Common symptoms include: white smoke from exhaust (coolant burning), oil in coolant or coolant in oil, engine overheating, loss of compression, bubbles in the radiator, external oil or coolant leaks around the head gasket area, and reduced engine power. |
| 9 |
Do you offer OEM genuine or aftermarket parts? |
We offer both options. Our premium aftermarket kits meet or exceed OEM specifications at a more competitive price point. Genuine Cum mins OEM kits are also available upon request. Please specify your preference when ordering. |
| 10 |
What is your return policy? |
Unused gasket kits in original packaging can be returned within 30 days of delivery for a full refund, minus shipping costs. Opened or installed kits cannot be returned due to the nature of sealing components. If you receive a defective product, we will replace it at no cost. |
| 11 |
Do you offer bulk or wholesale pricing? |
Yes, we offer competitive wholesale pricing for distributors, repair shops, and fleet operators. Minimum order quantities apply. Please contact our sales team with your requirements for a customized quote. |
| 12 |
What other QSK23 engine parts do you supply? |
We supply a full range of QSK23 engine parts including: lower gasket kits (4089361), pistons & liners, cylinder heads, crankshafts, bearings, valves, turbochargers, fuel injectors, water pumps, oil pumps, and sensors. Contact us for your complete parts needs. |
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