[IM]

here are the cylinder walls after 2nd teardown and bofore gasket cleaning.

[IM]

I am loosing coolant as well and if I raise the RPM’s and load the engine the people behind me disappear in the clouds created by my exhaust.

[IM]

you mean the water circuit running through the intake to warm up the air ? I checked it several times and I don’t really think it’s leaking. I even disabled it and still white clouds came out of my exhaust

[IM]

Thanks Eric, I have done leak down and compression Tests and they all came good, only cylinder 5 didn’t have the best leak down on the rings but it was still in range. I also rebuilt a Honda cbr900 fireblade before and turned out good. I don’t have your experience for sure but a used vq35de here in Germany costs 3000+ euros as people mostly drive diesels and Japanese cars aren’t so popular here as well,so I had to rebuild it because my last emissions weren’t really amazing.

[IM]

bump

[IM]

hopefully it’s only a valve or two which you could adjust with the tip of a screwdriver.

[IM]

I would do a leak down test to check for the valves. your engine B18B1 is an interference type and would probably have bent the valves causing the rough idle you’re talking about.

[IM]

I once had a similar situation and turned out to be my starter was gone. you could test that yourself by checking that both starter bolts receive voltage by cranking as I believe there is a relay unit in the starter which activates the starter motor after the gear is raised and engaged with the flywheel. my starter motor itself was fine and I tested the coil on a coil tester but the relay part was toast and that’s why my starter motor never received voltage.

[Author]

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