SR20 broken rocker = more problems - Page 2 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

nisileighty · 12-19-2018, 12:03 PM

I completely understand the dynamics of ignition cut at high RPMs for SR’s, or any motor with rockers for that matter. My main concern was why that caused such low compression on other unaffected cylinders, because when I checked my mechanical timing the first time I was dead on. And I was even able to crank the motor until the marks on the chain and cams lined up again.

RalliartRsX · 12-19-2018, 12:25 PM

It doesn't take much for valves to not seal.........or be viewable by the naked eye

None of it matters anyways as your head is at the machine shop to yeah......

pjurisprudencia · 12-27-2018, 06:40 PM

I had zero compression in my motor n cylinder 4, blew both Intake and exhaust. Put it all back together vacuum dropped due to me setting my timing wrong. Double check your timing

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12-27-2018, 06:40 PM	#33
pjurisprudencia Leaky Injector Join Date: Nov 2012 Location: Las Vegas Age: 29 Posts: 90 Trader Rating: (0) Feedback Score: 0 reviews	I had zero compression in my motor n cylinder 4, blew both Intake and exhaust. Put it all back together vacuum dropped due to me setting my timing wrong. Double check your timing Sent from my iPhone using Tapatalk __________________ Don’t mind me, I’m just an irrelevant little shit.

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12-19-2018, 12:03 PM	#31
nisileighty Zilvia FREAK! Join Date: Feb 2016 Location: Seattle, WA Posts: 1,218 Trader Rating: (4) Feedback Score: 4 reviews	I completely understand the dynamics of ignition cut at high RPMs for SR’s, or any motor with rockers for that matter. My main concern was why that caused such low compression on other unaffected cylinders, because when I checked my mechanical timing the first time I was dead on. And I was even able to crank the motor until the marks on the chain and cams lined up again.

12-19-2018, 12:25 PM	#32
RalliartRsX Post Whore! Join Date: Apr 2006 Location: Maryland Posts: 4,791 Trader Rating: (32) Feedback Score: 32 reviews	It doesn't take much for valves to not seal.........or be viewable by the naked eye None of it matters anyways as your head is at the machine shop to yeah......