The New “What did you do with your Z today” (with off topic replies) XXXIX

Ghostvette

I'm going to find a 16 number random number generator to use on scammers. "I'm sorry, did you misenter the number? I'm reading it off my card'...

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2015 Magma Red 6MT Sport Tech/2012 Fairlady MB 6MT Base (RIP 08032018)https://www.nicoclub.com/FSM/370Z/Coupe/

redondoaveb

I did a leak down test on my spare 3k mile motor out of my totaled z. All cylinders came back with zero leak down except cylinder #3. I found 70% leak down on the exhaust side. For some reason the exhaust valves weren't seating.

I decided to install my spare flywheel, trans and I bought a starter off Ebay so I could turn the motor over and see if I could get the valves to seat. They wouldn't seat cranking it by hand.

Filled her up with oil and cranked it for a few minutes. Got #3 cylinder back up to 50% leakdown. Since I could crank the motor over I decided to do a compression test. I borrowed a compression tester and ran all cylinders. The numbers were all over the place on all cylinders. From 60 to 85 psi. WTF. The leakdown came back perfect on all cylinders except #3, how could I have low compression on all cylinders. Must be a bad gauge.

Went to HF last night and bought one of their better gauge sets. As I was watching TV I started wondering what else might cause the low numbers and then I remembered I forgot to take off the tape covering the lower intake manifold ports to keep debris out, upper manifold was removed).

Went back today, took the tape off and did a re-test. All cylinders tested between 260/265 except #3 which was 180. I let the motor crank with the starter for about 10 minutes and then tested #3 again. Came up to 265.

I'll be wearing this cap for a while

Attached Images

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Fast Intentions "Stage Seb" twin turbo #098- Specialty Z/Tial-Xonarotor/CJM/Ecutek/HKS/KW/SPL/Hotchkis/Rohana/Toyo
750whp/700ft.lbs

Rusty

Sticky valve.

I had a Honda CB1 400 4 cylinder bike that I was restoring. It had a 4 valve head. #3 cylinder had a sticky exhaust valve. First fire it up. It would run like crap. Then all of a sudden it would clear it's self out. I used a temp gun to check the exhaust headers. #3 was low, then come up to temp. When I rebuilt the motor. I find one exhaust valve with a minor bend in it. Eyeballing it. You couldn't see it. Put the valve in a set of V blocks with a dial indicator. It had less than .005" in run-out. Put that valve in another spot, and it wouldn't fit.

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浪人 - 殺し屋
"The Difficult Anytime, The Impossible By Appointment Only"
http://www.the370z.com/members-370z-...o-journal.html