Hydraulic lifters problem on hot start

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Gotnoclass
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Hydraulic lifters problem on hot start

#1

Post by Gotnoclass » Sat Sep 15, 2018 5:59 am

Hello all,
58FLH
I’m having an issue with hot start up, where the engine sounds like empty rattle spray cans are shaken Vigorously. This can go on for just a few seconds or even up to a minute or so, depending on rpm. I assume the hydraulic lifter(s)(??) are collapsed and it takes some time for oil pressure to build back up.

My questions are:

1. How common is this issue ?
2. I’m using straight 50W Harley Davidson brand motor oil. Here in Las Vegas we’re still in the lower 100’s during the day - when I do most of my weekend riding. Will switching to a heavier oil remedy the issue in your opinion?
3. Do you guys recommend a solid pushrod conversion kit? If so any particular brand ?
4. Any other opinions you make are most welcome to help me solve this issue.
5. I must add that I have removed the “top hat” filter from the tappet screen housing - no change in engine’s behavior.

Looking forward to your thoughts regarding this matter.

Thanks!
Ran from Las Vegas



cant-drive-55
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Re: Hydraulic lifters problem on hot start

#2

Post by cant-drive-55 » Sat Sep 15, 2018 1:26 pm

How long between shutdown and restart? Good lifters should take 10 minutes or more to leak down. Do you have noisy lifters on a cold start?.

Gotnoclass
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Re: Hydraulic lifters problem on hot start

#3

Post by Gotnoclass » Sat Sep 15, 2018 5:44 pm

cant-drive-55 wrote:
Sat Sep 15, 2018 1:26 pm
How long between shutdown and restart? Good lifters should take 10 minutes or more to leak down. Do you have noisy lifters on a cold start?.
Thanks for the reply. No noisy lifters upon cold startup, only when hot. Between 0-20 minutes after engine shutdown, is when this issue is occurring.

Excalibur
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Re: Hydraulic lifters problem on hot start

#4

Post by Excalibur » Sun Sep 16, 2018 5:18 am

Put an oil pressure gauge on to see if psi is reasonable. What oil weight did HD recommend for your ambient temperature?

socalrider
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Re: Hydraulic lifters problem on hot start

#5

Post by socalrider » Sun Sep 16, 2018 6:05 am

Lifters can just be tired.try 60w oil.

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