compression and leakdown results

[garyS-NJ]

still fiddling with my reborn '84 XVZ12. purchased with seized motor and got that free and idling but she wont rev. Yes, I'm sure it's carbs but I did the pea shooter and shotgun and also soaked and ran with strong seafoam/fuel mix... (and cleaned up/checked the sliders). So I just did leakdown and compression tests with the following results:

 

#1 20% leak and 175 psi

#3 3% leak and 210 psi

#2 3% leak and 190 psi

#4 10% leak and 190 psi

 

all the leak seemed to be through the rings (exiting the crank timing inspection hole) and I'm generally happy with the results but would have wanted #1 a little closer.. maybe after she gets to running good things will even out a little.. She actually ran worse with the strong seafoam soak and then weaker seafoam mix for running but I'll run her with straight gas as a final check. THEN CARB TIME OH BOY (I'm a little nervous first time in these carbs).

 

oddball thing tho under the left side cover when cranking, the motor was dripping oil past the crank nut. I see there is an o-ring there but is that supposed to bathe in oil?

[Squidley]

As far as that #1 cylinder, put some Marvel Mystery Oil in the crankcase oil and see if perhaps there are some sticky rings. Putting some miles on it will also help to loosen all the internals back up. Good luck with the carbs.

[garyS-NJ]

yes, that was the plan but I never used marvel mystery oil (too mysterious). I figured seafoam would dilute the oil and perhaps act like an engine flush otherwise just work with the oil to loosen things up. maybe the #1 ring grooves are crudded up and the rings aren't rocking to keep good compression.