Intake Rocker Arm For ISUZU 4HK1 6HK1 6HH1 8-97306421-3 ISUZU Engine Parts

Product Description 

Product Picture 

Trading Information

Delivery Time: 5-30 days after deposit

Package: Original package

Unit: PCS

MOQ: 1 PCS

Company Profile

MANMA auto part Company are profession supplier for ISUZU JMC JAC and any other Chinese truck auto parts with over 25 years experiences.
Our company now has many brands such as MAMUR, TKEIXR,YOUJIE,etc.
Our company has set up authorized joint venture factories and companies in 26 countries. And successfully occupy the market in these areas, business all over the world.
If you need auto parts, welcome to contact me. More product details can be provided.
Any question, please feel free to tell me.

FAQ

Q1: Main causes of rocker arm damage and wear

A1:

1. Insufficient engine oil supply or clogged oil passage leads to dry friction between rocker arm friction surface and cam/push rod, rapid ablation wear
2. Long-term use of inferior diesel engine oil with impurities forms abrasive particles to scratch the rocker contact surface
3. Incorrect valve clearance adjustment: too small clearance causes the rocker arm to bear continuous pressure and fatigue fracture; excessive clearance produces violent impact wear
4. Engine over-revving, frequent heavy-load operation aggravates instantaneous impact force on rocker arms
5. Rocker shaft locking loosens, rocker arm swings eccentrically and wears unilaterally

Q2: Can valve rocker arms be interchanged among ISUZU, JMC and JAC engines?

A2: Even if the overall shape is similar, the curvature of the cam contact surface and force arm length are designed according to original valve timing parameters. Cross-model installation will disorder valve opening/closing timing, resulting in power drop and valve collision failure. Always verify the OE number before placing orders.

Q3: Key precautions during installation

A3:

1. Clean cylinder head oil passages and rocker shaft oil holes thoroughly before installation to prevent oil blockage leading to poor lubrication;
2. Distinguish intake rocker arm and exhaust rocker arm strictly for assembly, do not mix installation;
3. Adjust valve clearance strictly according to engine factory standard parameters after assembly;
4. Ensure rocker shaft positioning lock is fastened to prevent axial movement of rocker arms;
5. After assembly, idle the engine for 10 minutes for running-in, listen for abnormal noise, recheck valve clearance if knocking sound exists.

Q4: How to obtain quotation and product catalog?

A4: Send inquiries through the contact form on our website, attach truck model, engine code or rocker arm OE numbers. We will send quotation, stock status and detailed specifications within 24 hours.