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Old 08-20-2010, 05:19 PM   #1
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seafoam problem

I have 90k on my 2000 3.8 convert. I added a third of a can of SF through the break booster, it stalled, waited 20 min. and the starter motor can't even crank the motor. It sounds like it seized.
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Old 08-21-2010, 02:38 AM   #2
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Re: seafoam problem

Remove spark plugs and crank again.. - This will clear out any excess cylinder pressures.. reinstall spark plugs and have at it..

You may have sucked it in too fast.. It would act like it's seized, but it's what's known as hydrolock..

3.8s are good at blowing head gaskets and hydrolocking without damaging anything else.. so you should be ok
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Old 08-21-2010, 04:03 AM   #3
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Re: seafoam problem

Pulled the plugs, but hand rotated the crank shaft. Started it up with fingers crossed and it started. Thank so much for the advise.
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Old 08-22-2010, 04:28 AM   #4
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Re: seafoam problem

Quote:
Originally Posted by classman View Post
Pulled the plugs, but hand rotated the crank shaft. Started it up with fingers crossed and it started. Thank so much for the advise.
No problem, glad to hear it

For the record though it is okay to crank the engine with the spark plugs out, you will have zero compression, so anything that was compressing in cylinders and not letting you crank the engine will get blown out, quite quickly... It's pretty fun..

Next time you seafoam (I wholly agree with seafoaming every 15-20k miles..)

Just a thought, try pouring the seafoam into a cup, rather than jamming the vacuum tube into the seafoam can (only assuming you did this, if not see below) - I use a red 'party' cup

Pour in desired amount of seafoam then "skim" the fluid.. When I do it, I am sure to suck in more air than seafoam.. Still has the desired affect, engine will stumble pretty badly though I've never let it stall on its own, i've always had to shut it off.. and still have quite a smoke show on restart..

Anyhow.. glad it worked out for you!
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Old 08-22-2010, 08:13 AM   #5
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Re: seafoam problem

I've been there before...

Glad you got some quick advise and got it figured out.
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Old 08-22-2010, 08:21 AM   #6
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Re: seafoam problem

me toooo, i did it to my 3000gt when we first bought it, it hd 230,xxx miles on it. i ended up rebuilding the engine but for fun we ran some seafom through it. My conculsion is unless your ready to patch or replace all the holes in your exhuast your not aware of yet dont do it lol, i had holes in the manifolds all the way to the tips lol, we had no idea they were all patched with oil and what not. the seafoam is a great hole finder lol
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