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SN95 Cobras
Lash Adjuster Replacement and Secondary Intake Valve Cleaning
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<blockquote data-quote="ViciousBlack97" data-source="post: 16662095" data-attributes="member: 157485"><p>MAJOR UPDATE: So, after getting it reassembled, it was running great. I had it holding at around 2500 rpm, waiting to come up to temp, when I heard a loud snap, and the car started running like crap. I shut it off immediately, and freaked the #$%^ out. After pulling the valve covers and cranking the engine a little more, I noticed that the noise was gone, and the <strong>SAME ROCKER ARM </strong>was now sitting in the bottom of the passenger side head. I think I'm going to reassemble without that follower and see how she runs, just to make it to the paint shop. After talking to the guys at Pro Dyno, sounds like there are 3 possibilities: Weak valve spring, bent/tweaked valve, or a failing exhaust seat. I know these 4 valve heads have been known to lose valve seats before, so I won't be surprised if that's the outcome. So, pending how it runs on 1 exhaust valve on the rear-most passenger cylinder, we'll get it to the paint shop, and then immediately over to Pro-Dyno for an evaluation. A side note: without that follower on the valve, that cylinder has perfect compression (~180psi).</p></blockquote><p></p>
[QUOTE="ViciousBlack97, post: 16662095, member: 157485"] MAJOR UPDATE: So, after getting it reassembled, it was running great. I had it holding at around 2500 rpm, waiting to come up to temp, when I heard a loud snap, and the car started running like crap. I shut it off immediately, and freaked the #$%^ out. After pulling the valve covers and cranking the engine a little more, I noticed that the noise was gone, and the [B]SAME ROCKER ARM [/B]was now sitting in the bottom of the passenger side head. I think I'm going to reassemble without that follower and see how she runs, just to make it to the paint shop. After talking to the guys at Pro Dyno, sounds like there are 3 possibilities: Weak valve spring, bent/tweaked valve, or a failing exhaust seat. I know these 4 valve heads have been known to lose valve seats before, so I won't be surprised if that's the outcome. So, pending how it runs on 1 exhaust valve on the rear-most passenger cylinder, we'll get it to the paint shop, and then immediately over to Pro-Dyno for an evaluation. A side note: without that follower on the valve, that cylinder has perfect compression (~180psi). [/QUOTE]
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Lash Adjuster Replacement and Secondary Intake Valve Cleaning
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