Seafoam Explosion
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Teching In
Joined: Jan 2007
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From: Burbs of Chicago
Seafoam Explosion I seafoamed my 150k LT1 caprice because it was hesitating a little on start up. I did the standard bottle in the tank and 3/4 to half down the booster line. I kept it running while I was pouring most of it then let it die and walked away. I came back 25 min later, cranked it over and boom went the motor. I heard a loud bang and she locked up really good. Anyone have any ideas on what could have caused this?
Originally Posted by DaveH71
damn dude your not sopposed to put 3/4 of the bottle in your booster line. At most you should only put about 1/3.
I've put a whole bottle in my booster line slowly, then put 1/3 in FAST and let it die. Waited 30 mins and it smoked like hell on startup and everything seems to be fine and dandy. Your 150k mile LT1 was most likely on its way out already...
It sounds like you hydrolocked it. A liquid cannot be compressed..so if there was any liquid seafoam in the cylinder(s) when you tried to start it, you prolly broke/bent a rod or something. Next time if that happens..take the spark plugs out, and crank it over a few times..this will blow out any liquid that is in the cylinders. good luck
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yea def sounds like you hydrolocked it. i just seafoamed my 150k ls1 and it smoked something wicked on start up but no bang. i was under the impression though that out of the half bottle reserved for the vacuum line only 1/3 of THAT amount was suppose to be rapidly dumped in. i think you had too much seafoam sitting in your cylinders for too long. the only other thing that might haave happened was when you poured the other half bottle in the crankcase you did it whie the motor was at temp and possibly harmed something.
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Verdad Gallardo Thread Starter
Teching In
Joined: Jan 2007
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From: Burbs of Chicago
I never put any in the crank case and the engine was running up until the very last min. I kept it running until I dumped the last maybe 8 oz in. What I think I saw out of the corner of my eye was smoking comming from the pass side exhaust manifold. I guess that could have been a leak but I'm going to tear down the top half of the motor tonight and see what she looks like. I have a ton of replacement parts for this car.
If anyone is looking for any LT1 engine parts or Caprice replacement body parts odds are I have them, just drop me a line.
If anyone is looking for any LT1 engine parts or Caprice replacement body parts odds are I have them, just drop me a line.
Originally Posted by Slick02WS6
Anyone have any ideas on what could have caused this?
Originally Posted by Slick02WS6
was pouring most of it then let it die
Staging Lane
Joined: Mar 2007
Posts: 51
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From: Da Desert of AZ
Originally Posted by Slick02WS6
I seafoamed my 150k LT1 caprice because it was hesitating a little on start up. I did the standard bottle in the tank and 3/4 to half down the booster line. I kept it running while I was pouring most of it then let it die and walked away. I came back 25 min later, cranked it over and boom went the motor. I heard a loud bang and she locked up really good. Anyone have any ideas on what could have caused this?
Thread Starter
Teching In
Joined: Jan 2007
Posts: 48
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From: Burbs of Chicago
I ran seafom through my LS1 several times already to clear all the carbon residue out of it. I never had anything like this even remotely happen. I followed the steps in the stickey and everything worked out perfect. I have removed all the plugs and it seems it was loaded with seafoam. I'm going to run it a few times with no plugs, replace them all and try from there. I know this car was already doomed, but I tried. I guess we'll find out what happens when you use seafoam incorrectly because this car cant break anymore.
Originally Posted by ssblackss00
Isn't Seafoam 100% pure petroleum so how culd it hydrolock?
Originally Posted by taintedmeat
And flammable, so if anything it seems like it would just ignite along with your fuel mixture.