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Does anyone know what this sound is?
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Topic: Does anyone know what this sound is? (Read 2648 times)
audrima
Frequent Member
Posts: 303
Does anyone know what this sound is?
«
on:
November 11, 2017, 04:08:35 PM »
hello all,
My truck( 1978 GMC C25 hd with a 350 Qjet) is making a weird noise. and I don't know what it is. I'm thinking rocker is lose.
here is 2 clips to hear it.
https://www.dropbox.com/s/xs7orold7qkxb7j/20171111_155044.mp4?dl=0
https://www.dropbox.com/s/92ynbs1q09b7y4o/20171014_122947.mp4?dl=0
don't know and I need to drive her to nyc very soon and tow a Subaru home.
any home will be welcome thanks!
Aud
«
Last Edit: November 11, 2017, 04:21:29 PM by audrima
»
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VileZambonie
Global Moderator
Senior Member
Posts: 19010
Re: Does anyone know what this sound is?
«
Reply #1 on:
November 11, 2017, 04:59:28 PM »
Did you check the oil?
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, ___
/ _ _ _\_
⌠ŻŻŻŻŻ' [☼===☼]
`()_);-;()_)--o--)_)
74 GMC
,
75 K5
,
84 GMC
,
85 K20
,
86 k20
,
79 K10
audrima
Frequent Member
Posts: 303
Re: Does anyone know what this sound is?
«
Reply #2 on:
November 11, 2017, 05:06:09 PM »
oil is full of 10w40 (though it is 2 years old but only 800 miles.)
Aud
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zieg85
Global Moderator
Senior Member
Posts: 7543
Re: Does anyone know what this sound is?
«
Reply #3 on:
November 11, 2017, 05:09:13 PM »
I hear an exhaust leak, loose alternator belt and a noisy lifter
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Carl
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
https://www.facebook.com/groups/248658382003506/
VileZambonie
Global Moderator
Senior Member
Posts: 19010
Re: Does anyone know what this sound is?
«
Reply #4 on:
November 11, 2017, 05:11:21 PM »
Does it have an oil pressure gauge? Does it read pressure? If so, pull the valve cover, make sure oil is coming to the rockers, check valve adjustment. What kind of oil have you been using?
Logged
, ___
/ _ _ _\_
⌠ŻŻŻŻŻ' [☼===☼]
`()_);-;()_)--o--)_)
74 GMC
,
75 K5
,
84 GMC
,
85 K20
,
86 k20
,
79 K10
audrima
Frequent Member
Posts: 303
Re: Does anyone know what this sound is?
«
Reply #5 on:
November 11, 2017, 05:20:13 PM »
there is a exhaust leak, but its taped up, sooo need a new y pipe. I'll check the belts I did just change the water pump. I hope it's something easy like a lifter! The oil when I first start is at 60 but after it warms up (or about 20 min) is goes and stays at 40 (in the middle). i it has pensoil 10w40 right now. about 800 miles since it was change...2 years ago (almost 3) this truck has had pensoil all it's life.
thank you for your replies.
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FlatBlack77
Junior Member
Posts: 894
Cheap Fast Reliable - Pick 2
Re: Does anyone know what this sound is?
«
Reply #6 on:
November 11, 2017, 05:57:11 PM »
I wouldnt call replacing a lifter an easy job. not extremely difficult but its not just a few bolts kinda job.
I would pull the valve cover like Vile said. might aswell do both. make sure everything is getting oiled and youll probably be able to find the loose one very easily
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"When you are a hammer, everything looks like a nail"
'77 C/10 - 350/350 mild street motor
audrima
Frequent Member
Posts: 303
Re: Does anyone know what this sound is?
«
Reply #7 on:
November 11, 2017, 06:05:26 PM »
Well easy compared to replacing the whole engine. valve covers come off tomorrow (if there is money in the bank lol)
thanks everyone
Aud
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Engineer
Senior Member
Posts: 1402
Re: Does anyone know what this sound is?
«
Reply #8 on:
November 11, 2017, 06:36:43 PM »
Give each of your rocker nuts a 1/4 turn and see if that quiets the lifter.
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2002 Chevy 2500HD 4x4 8.1/ZF6sp RC/LB
2001 Chevy 2500HD 4x4 6.0/4L85E EC/SB
1997 Chevy Blazer 4x4
1994 Chevy K-2500 4x4 C6P 5.7/4L80E
1979 Chevy K-30 4x4 4sp 4.10
1977 Chevy K-30 4x4 4sp 4.10 454
Dad of an Eagle Scout, and a Life Scout
audrima
Frequent Member
Posts: 303
Re: Does anyone know what this sound is?
«
Reply #9 on:
November 11, 2017, 07:17:14 PM »
I will do that thank you
aud
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Does anyone know what this sound is?