lexx077

My son and I have a 73' 620 that i picked up for $400, which had been sitting for roughly 4 yrs. The motor was swapped for an l20b with a dogleg 5 speed and may have lead to the reason for it getting parked. The engine appears to have been cleaned up and possibly gone thru ( I can see some red gasket sealer on some parts). We installed a brand new Weber 32/36 dgev, and had the timing set. We drove it for about 40 miles and it smoked the whole way ( all-be it not excessive unless accelerating and smelling more rich as well). Despite the the rule that black smoke is rich, blue smoke is oil, and white smoke is coolant, this pukes white smoke!? not sweet like antifreeze or like burnt oil ( i have had those experiences when I was young with my own 510's and 620's). Here's what i know: engine idles and runs strong, *has decent compression, 1-140, 2-130, 3-125, 4-135...( there is a variance in the compression results that suggest an issue in # 2-3 cylinders, but that wouldn't lead to the overly rich smell) *original plugs where black and wet smelled like fuel *new plugs are wet and somewhat black( although they have approx 1 hr on them in the garage not driven, but throttle cycled for tuning) *I removed the carb and adapter plates then resealed them with * cough* gasket sealer... o.0 to try and see if that was the issue *Spraying starter fluid around the base and under the intake makes the engine stumble ( like it has a vacuum leak, double checked all bolts and gaskets. everything is tight) *There are no bubbles in the radiator, or coolant level changes,( although engine seems to warm up very quickly... thermos stat, or lean condition? contradictory) *there is no water in the oil or a reduction in the oil level ( again the smoke has no burnt oil smell) *I was beginning to think that it may be a PCV valve issue, but it doesn't appear to be ( i removed the crank case hose and plugged the PCV still has same issue) I am trying to trouble shoot as mucha s possible before i resort to removing the intake and head... any suggestions? Here's a video of the issue:

thanks it looks allot better than it did, We were amazed at the amount of wasp nests we found... Cant wait to start digging into it

yes Steve "boaty" lol so much for being anonymous...

It was sitting long enough to become part of the lawn... Good old L16 Awesome custom interior.lol Body is pretty straightMy buddy John..Mr. EbrakeFirst wash... There wasp nest everwhere..all clean :)Going Home

Hey, I know that truck! lol :w00t: