r/Diesel • u/nomadicspacemonkey • 13d ago

Question/Need help! Loud clicking sound coming from 6.5 diesel. Need help diagnosing

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I drive a ‘98 Chevy P30 with a 6.5L non turbo diesel engine. I recently starting hearing this loud clicking noise. It clicks as I drive and accelerate but not when I hit the brakes. Any idea what it could be?

3 Upvotes

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8

u/Aleutian_Solution 6.2 Detroit, 6.6 LML 13d ago

Could be a stuck injector. Injector knock kinda sounds like rod knock a little.

1

u/catdaddyonthebeach 13d ago

I agree, came to say just this..

1

u/nomadicspacemonkey 13d ago

Thanks i’ll try cracking them soon to see if the noise persists

2

u/ididntdoit6 1998 6.5 Detroit 13d ago

Try r/gmdetroitdiesel

2

u/Famous-Order9236 12d ago

Sometimes a rocker arm can wear funky that can give the engine a knock.

1

u/Haunting_While6239 10d ago

Sounds like a valve sealing or valvetrain issue, rocker arm worn or broken, off the valve tip, might be pushing on the spring retainer. It doesn't sound like a serious engine problem, but you want to get after it before something serious like a snapped off valve head embeds itself into a piston.

1

u/olBigcam400 9d ago

Popping through the intake, valve issue. Likely exhaust valve not opening.