Mighta made an oopsie. Name that Knock!
08-11-2022, 03:57 PM
#31
Registered
You suspected carbon build-up initially thus the steam cleaning. Maybe the water vapor caused localized cooling of the valve guide causing it to shrink just a hair making the carboned-up exh valve stick open??
On the brighter side, looks like you'll have a chance to address #7 while you have the head off.
On the brighter side, looks like you'll have a chance to address #7 while you have the head off.
08-11-2022, 04:13 PM
#33
Fast Singles Club
Gold Member
iTrader: (8)
On the bright side, you may have inadvertently discovered a huge problem that left unchecked could have caused a catastrophic destruction of your engine. Leaky headers have destroyed many thus the design change.
08-11-2022, 04:27 PM
#34
Platinum Member
Platinum Member
iTrader: (6)
you got lucky that piece of guide plate didn't go down under............
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DrFeelgood (08-11-2022)
08-11-2022, 07:22 PM
#36
Registered
Thread Starter
If I pull cylinder head this weekend, and the tops of the pistons look fine, what's the chances that this is purely a top end problem and the bottom end is fine?
08-12-2022, 04:01 AM
#38
Registered
Thread Starter
"Trickled" into the hose would be a more accurate word.
I've done this before on other engines (including the starboard one 5 minutes earlier) with no ill effects.
Pending final analysis of what went wrong, I reserve the right to re-evaluate my choices
08-12-2022, 07:29 AM
#39
Registered
"poured" is a strong word.
"Trickled" into the hose would be a more accurate word.
I've done this before on other engines (including the starboard one 5 minutes earlier) with no ill effects.
Pending final analysis of what went wrong, I reserve the right to re-evaluate my choices
"Trickled" into the hose would be a more accurate word.
I've done this before on other engines (including the starboard one 5 minutes earlier) with no ill effects.
Pending final analysis of what went wrong, I reserve the right to re-evaluate my choices
08-12-2022, 07:48 AM
#40
Registered
Thread Starter
Yeah, I've noticed that. Though, I can't really get too upset, I bought this thing with no real knowledge of how/when/if these motors had any real work done to them in the last 20 years. Best I can tell, the motors were redone in 2003-2004 with no evidence of being opened up since, and somewhere around 450-500 hours on them since then.
Even if I had the leakdowns done prior to purchase I don't know that it would have been bad enough to make me not buy it.
When I bought the Cigarette, I bought it with the knowledge that the motors were recently built, and got a false sense of security about the likely reliability of what turned out to be very sub-par builds.
Even if I had the leakdowns done prior to purchase I don't know that it would have been bad enough to make me not buy it.
When I bought the Cigarette, I bought it with the knowledge that the motors were recently built, and got a false sense of security about the likely reliability of what turned out to be very sub-par builds.
Last edited by DrFeelgood; 08-12-2022 at 07:53 AM.
