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PostPosted: Sun May 17, 2015 8:01 am 
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Joined: Fri Dec 05, 2014 5:39 pm
Posts: 423
Location: United States
I believe my 87 Chevy sprint number 2 cylinder has a sticky exhaust valve. It seems to only happen when the engine is warm and happens randomly.
I have every intention of pulling the head off and rebuilding it but I am curious if I can postpone it for a month or two ( just depends on when the urge hits me) with thicker oil or an oil additive like Marvel Mystery oil?
Let me just say I don't believe in miracle cures from a petroleum bottle which is why I'm looking for you're guys input on this one.
Reguardless of the outcome I will be rebuilding the head
Thanks Edd

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PostPosted: Sun May 17, 2015 9:16 am 
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Joined: Fri Dec 05, 2014 11:23 pm
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Location: SK
Drain your oil and fill it with ATF and a fresh filter. Let it idle for about an hour, then drain and fill with regular oil. Don't let it drip completely dry, the leftover ATF will keep cleaning. Do another oil and filter change in 500-1000 km.

This is a common method for reducing valve train noise and removing sludge


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PostPosted: Sun May 17, 2015 9:40 am 
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Thank you.
I will go ahead and do just that. The valve train does get a little noisey as well when heated up.
I'll be sure to post how it turns out.
Thanks again Edd

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PostPosted: Sun May 17, 2015 4:46 pm 
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I had one lifter that would bleed overnight and sound plain awful for the first 10 minutes, and a few that clicked no matter what. It fixed the bleeding problem completely, and significantly reduced the regular tapping. Hopefully you have good results too


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PostPosted: Sun May 17, 2015 9:33 pm 
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Location: Emerald city Washington
Rustyoid wrote:
I had one lifter that would bleed overnight and sound plain awful for the first 10 minutes, and a few that clicked no matter what. It fixed the bleeding problem completely, and significantly reduced the regular tapping. Hopefully you have good results too


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Not in a 1987 chevy sprint turbo they don't have Lifter
.
OP DO NOT do the AFT treatment .... REBUILD in 3....2.......1

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FloridaEdd wrote:
I believe my 87 Chevy sprint number 2 cylinder has a sticky exhaust valve. It seems to only happen when the engine is warm and happens randomly.
Edd


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My money is on bent valve stem... Do not ignore a stick valve this will go badly if unchecked
.......
Check your valve lash ASAP
......
....jv&s
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PostPosted: Sun May 17, 2015 10:48 pm 
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Too late. Already tried the aft treatment and made no difference. Doesn't sound any worse at least.
I'm thinking I may pull the head off this week and check it out. I've checked and replaced just about everything chasing the burp/ miss fire and feel the head is the next place to look.
Edd

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PostPosted: Sun May 17, 2015 10:50 pm 
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Location: United States
Valve lash was adjusted about a week ago. The first time I adjusted it the number 2 exhaust valve was
.002 too tight. Which started me thinking there may be an issue with that valve. Edd

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