hi all,
trying to get things up to snuff in our 80, i did the seafoam thing last night. SLOWLY poured 1/3 can into pcv hose as engine running, making sure not to pour enough to hydrolock. turned off 10 min. then back on. really, there was very little smoke and i was happy, thinking it's clean. then decided to do it again, just for good measure--- the second (and third) time after startup, it smoked like mad. after trying to discern whether there was any difference, i've concluded ... it's hard to tell. the engine ran completely smoothly BEFORE and revved with no stumbles, etc... and does that now. i SUSPECT that some of us looking for an improvement rev the engine AFTER the treatment and note how smoothly it runs, etc. but don't do the same things BEFORE, thereby not comparing. just my .02
as point of interest, did the seafoam to my LS400, too. first time smoked, etc. then second time, as i turned off ignition, it kept running for about 6 secs and made a 'horrible' clanking, knocking sound a few times. i shuddered as i pondered how i was going to explain the $2,000 of hydrolock damage we'd just done to my wife...i waited, then started up to a few knocks, shut down, started again to one knock, down, then up and runs fine. after reflecting, i THINK what was happening was pre-ignition knock, not mechanical. seafoam is obviously flammable and a lot would ignite perhaps in the combustion chamber, like ignition knock does. it cleared itself as described and didn't make a sound after many starts, stops, running, etc...
one last point--- we're putting the stuff into a hose that sucks from the engine constantly. that hose constantly sucks up engine oil fumes and possibly small amounts of oil, right? is it possible that we're just freeing/ cleaning that oil out of the pcv hose and the area directly aft? sucking all that dirty caked oil into the intake system, on to valves and the combustion chamber? of course it's going to smoke--- oil being burnt smokes. it doesn't neccesarily mean we're cleaning anything, just means we did something to get a lot of oily residue into the intake/combustion system.... maybe?
hope this adds to the myth/miracle/help of the stuff.
trying to get things up to snuff in our 80, i did the seafoam thing last night. SLOWLY poured 1/3 can into pcv hose as engine running, making sure not to pour enough to hydrolock. turned off 10 min. then back on. really, there was very little smoke and i was happy, thinking it's clean. then decided to do it again, just for good measure--- the second (and third) time after startup, it smoked like mad. after trying to discern whether there was any difference, i've concluded ... it's hard to tell. the engine ran completely smoothly BEFORE and revved with no stumbles, etc... and does that now. i SUSPECT that some of us looking for an improvement rev the engine AFTER the treatment and note how smoothly it runs, etc. but don't do the same things BEFORE, thereby not comparing. just my .02
as point of interest, did the seafoam to my LS400, too. first time smoked, etc. then second time, as i turned off ignition, it kept running for about 6 secs and made a 'horrible' clanking, knocking sound a few times. i shuddered as i pondered how i was going to explain the $2,000 of hydrolock damage we'd just done to my wife...i waited, then started up to a few knocks, shut down, started again to one knock, down, then up and runs fine. after reflecting, i THINK what was happening was pre-ignition knock, not mechanical. seafoam is obviously flammable and a lot would ignite perhaps in the combustion chamber, like ignition knock does. it cleared itself as described and didn't make a sound after many starts, stops, running, etc...
one last point--- we're putting the stuff into a hose that sucks from the engine constantly. that hose constantly sucks up engine oil fumes and possibly small amounts of oil, right? is it possible that we're just freeing/ cleaning that oil out of the pcv hose and the area directly aft? sucking all that dirty caked oil into the intake system, on to valves and the combustion chamber? of course it's going to smoke--- oil being burnt smokes. it doesn't neccesarily mean we're cleaning anything, just means we did something to get a lot of oily residue into the intake/combustion system.... maybe?
hope this adds to the myth/miracle/help of the stuff.
