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Old Mar 16, 2022 | 07:26 PM
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Default Noisy lifters

I had two clattering lifters after rebuilding the bottom end. I washed the block out with detergent before I assembled the motor. But for whatever reason, the lifters became stuck. Anyway, I added MMO and one of the lifters quit clattering. But, after driving about 200 miles the other lifter was still clattering and getting worse.

I'm an old Gen 1 guy and the thought of having to pull the head to change a lifter really bothers me. So. I decided to try an old trick. I got some carb cleaner, the aerosol type with the straw and shot some in. Let it sit for 5 minutes and tried pushing it with the pushrod but it was still stuck. So, I put the pushrod back in place and put the straw in the lifter oil hole and sprayed again, waited 5 minutes, and it was still stuck.

The next move was plan B. I sprayed the lifter again through the pushrod and got a rubber mallet. I placed the rubber head against the pushrod and with a ball peen hammer rapped it 4 or 5 times. Voila, the lifter broke free and you could press the cup in and out.

This happened today, and I'm still happy. The motor runs like a top. Its old school but it worked here. I'm glad I didn't have to pull the head.
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Old Mar 16, 2022 | 07:42 PM
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Originally Posted by rednari2
I had two clattering lifters after rebuilding the bottom end. I washed the block out with detergent before I assembled the motor. But for whatever reason, the lifters became stuck. Anyway, I added MMO and one of the lifters quit clattering. But, after driving about 200 miles the other lifter was still clattering and getting worse.

I'm an old Gen 1 guy and the thought of having to pull the head to change a lifter really bothers me. So. I decided to try an old trick. I got some carb cleaner, the aerosol type with the straw and shot some in. Let it sit for 5 minutes and tried pushing it with the pushrod but it was still stuck. So, I put the pushrod back in place and put the straw in the lifter oil hole and sprayed again, waited 5 minutes, and it was still stuck.

The next move was plan B. I sprayed the lifter again through the pushrod and got a rubber mallet. I placed the rubber head against the pushrod and with a ball peen hammer rapped it 4 or 5 times. Voila, the lifter broke free and you could press the cup in and out.

This happened today, and I'm still happy. The motor runs like a top. Its old school but it worked here. I'm glad I didn't have to pull the head.
Good to see the old school method come through here. How did you narrow down which ones were the culprits? By pressing on the rockers?
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Old Mar 16, 2022 | 07:44 PM
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Sometimes a man's gotta do what a man KNOWS has worked in the past.
The internals are still a hydraulic lifter, though further refined in later years, and the basic operation is the same.
You done good!
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Old Mar 16, 2022 | 07:58 PM
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Originally Posted by Che70velle
Good to see the old school method come through here. How did you narrow down which ones were the culprits? By pressing on the rockers?
Exactly. Also, when I found the culprit lifter, I tried a rod which was 30 thou longer and it quieted down. Then I got out the carb cleaner.
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