| hearing lifters on thorley headers [message #157716] |
Mon, 23 January 2012 06:12  |
tgeiger
Messages: 518
Registered: February 2006
Location: kansas city
Karma: -1
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When I start up the beast, I hear the lifters for a bit until it warms up. And even though it does get better the lifters don't seem to completly quiet down. I've tightened the bolts on the Thorley headers but they seem pretty tight already. Is there anything you guys do for this to keep that seal on the headers?
Tom Geiger
76 Eleganza II
KCMO
[Updated on: Mon, 23 January 2012 06:12] Report message to a moderator |
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| Re: [GMCnet] hearing lifters on thorley headers [message #157719 is a reply to message #157716] |
Mon, 23 January 2012 06:53  |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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I don't see a connection between headers and lifters. My 23' has Thorleys, the PB has stock manifolds. The 23' starts and runs with a nice rear muffler rumble. The PB has under load or engine accelleratiohn a 'spit' which is almost certainly due to a blown exhaust gasket on the pax side of the engine... the alternative being a busted pax side manifold. Is this the thing you are perhaps hearing?
--johnny
'76 23' transmode norris
'76 palm beach
From: tom geiger <tgeiger@burnsmcd.com>
To: gmclist@temp.gmcnet.org
Sent: Monday, January 23, 2012 7:12 AM
Subject: [GMCnet] hearing lifters on thorley headers
When I start up the beast, I hear the lifters for a bit until it warms up. And even though it does get better the lifters don't seem to completly quiet down. I've tightened the bolts on the Thorley headrs but they seem pretty tight already. Is there anything you guys do for this to keep that seal on the headers?
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Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] hearing lifters on thorley headers [message #157722 is a reply to message #157716] |
Mon, 23 January 2012 07:19 |
Steven Ferguson
Messages: 3447
Registered: May 2006
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Tom,
Header gasket leaks closely resemble lifter ticking. Once you get a leak,
tightening doesn't seem to stop it. Your best approach is to replace the
header to head gaskets with the copper ones, or thick composition gaskets
and use red, high temp RTV on both sides. Tighten them down, then
retighten another 2-3 times after heating and cooling cycles.
On Mon, Jan 23, 2012 at 5:12 AM, tom geiger <tgeiger@burnsmcd.com> wrote:
>
>
> When I start up the beast, I hear the lifters for a bit until it warms
> up. And even though it does get better the lifters don't seem to completly
> quiet down. I've tightened the bolts on the Thorley headrs but they seem
> pretty tight already. Is there anything you guys do for this to keep that
> seal on the headers?
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Fathom the hypocrisy of a nation where every citizen must prove they have
health insurance......but not everyone has to prove they're a citizen.
Steve Ferguson
Sierra Vista, AZ
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| Re: [GMCnet] hearing lifters on thorley headers [message #157743 is a reply to message #157722] |
Mon, 23 January 2012 10:35 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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On Jan 23, 2012, at 6:19 AM, Steven Ferguson wrote:
> Tom,
> Header gasket leaks closely resemble lifter ticking. Once you get a leak,
> tightening doesn't seem to stop it. Your best approach is to replace the
> header to head gaskets with the copper ones, or thick composition gaskets
> and use red, high temp RTV on both sides. Tighten them down, then
> retighten another 2-3 times after heating and cooling cycles.
I use Permatex Ultra Copper sealant on both sides of the gasket and it seems to hold up fine.
Emery Stora
77 Kingsley
Santa Fe, NM
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| Re: hearing lifters on thorley headers [message #157800 is a reply to message #157716] |
Mon, 23 January 2012 18:48 |
skip2
Messages: 544
Registered: September 2011
Location: Winter Haven,FL (center o...
Karma: 3
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From my hot rod days I remember some plain steel headers actually had a pinging sound because of them being tubing not cast iron.
74 Canyon Lands, FiTech,
3.7 FD LSD, Manny Tranny,
Springfield Distributor,
2001 Chevy Tracker Ragtop Towd
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| Re: hearing lifters on thorley headers [message #157808 is a reply to message #157716] |
Mon, 23 January 2012 20:03 |
RadioActiveGMC
Messages: 1020
Registered: November 2010
Location: Hot AZ desert
Karma: 0
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I had one lifter that tapped. Sounds just like a header leak. I added Marvel Mystery Oil, and ran it awhile. Then drained it. Then I added a can of Rislone. Noise never came back.
***"Gettin There"-1973 23' Sequoia-
Michael, Onans smell, "Go solar/wind power!"
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