Did SeaFoam mess up my brake booster? - DodgeTalk : Dodge Car Forums, Dodge Truck Forums and Ram Forums
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post #1 of 37 Old 11-15-2010, 09:38 AM Thread Starter
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Did SeaFoam mess up my brake booster?

Two weeks ago I "SeaFoamed" my engine through the vacuum port on the brake booster check valve (like most people do it).

Everything seemed fined until a couple of days ago. Now, everyday when I start my truck and press the brake pedal I get a loud whistling noise for several seconds. Sounds like the brake booster diaphram and/or check valve is leaking air. If I hold the pedal down hard I can hear air rushing.

I checked the vent and it IS capped. (I actually remembered to put it back on!)

My truck has 82K mi on it. Is it common for the booster to begin leaking at this age or did the SeaFoam mess it up?
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post #2 of 37 Old 11-15-2010, 12:36 PM
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the sea foam should have zero effect on the brake booster since it should never enter it. your only using the vacuum line to suck the fluid into the intake.

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post #3 of 37 Old 11-15-2010, 12:49 PM Thread Starter
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If, for some reason, the SeaFoam DID get into the booster, could the solvents damage the diaphram or is this just a freak coincidence?
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post #4 of 37 Old 11-15-2010, 12:55 PM
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You better believe it. Stuff eats deposits and stuff. It will tear apart the brake boosters rubber diaphram like nothing.


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post #5 of 37 Old 11-15-2010, 01:30 PM
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Same thing happened to mine about a year ago. Yep about 2 weeks and there I was installing a new brake booster.
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post #6 of 37 Old 11-15-2010, 01:31 PM
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I have not Seafoamed it since then.
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post #7 of 37 Old 11-15-2010, 01:52 PM
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I don't see any way the Seafoam is entering your BB. The vacuum in the line is from the BB to the engine not the reverse. Your BB does not suck air the engine has the suction. So for the Seafoam to have entered the BB there needs to be a problem somewhere causing a reverse flow. I am not even sure that is a possible scenario? I don't see how it could get into the BB against the suction of the engine vacuum in the line????

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post #8 of 37 Old 11-15-2010, 02:52 PM Thread Starter
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Originally Posted by NHHEMI View Post
I don't see any way the Seafoam is entering your BB. The vacuum in the line is from the BB to the engine not the reverse. Your BB does not suck air the engine has the suction. So for the Seafoam to have entered the BB there needs to be a problem somewhere causing a reverse flow. I am not even sure that is a possible scenario? I don't see how it could get into the BB against the suction of the engine vacuum in the line????
Actually, I think it can happen quite easily. When the engine is running there is vacuum in the brake booster. When you feed enough fluid through that vacuum port to stall the engine (as it says to do) the residual vacuum in the booster can suck fluid back INTO the booster.

The makers of Sea Foam say it won't harm the diaphram but I'm not so sure. Seems like an awfully related coincidence. I hope I didn't create my own problem here.
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post #9 of 37 Old 11-15-2010, 02:53 PM
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I dont know how either, but it sure is strange that mine did the same thing as his.
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post #10 of 37 Old 11-15-2010, 03:09 PM
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Did you use the right hose? If you did, there's no way seafoam would get into the brake booster. You remove that hose from the brake booster and that hose feeds into the engine. You effectively break the chain where the brake booster would link in. It's no longer connected to anything the sea foam touches until you plug the hose back onto it (which should be after the seafoam has all entered the engine). If you're talking about some kind of backwash upon starting the truck back up (with the hose connected), that's highly improbable.

I suck the seafoam in a little bit at a time, and don't try to kill the engine on purpose. I do that for about 1/3 a can about once a year. Once I get all in that I want, I hook the line back up with the engine still running, then go around and cut the engine with the key, let it sit awhile and then crank it back up in 20 minutes.

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post #11 of 37 Old 11-15-2010, 03:47 PM Thread Starter
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Originally Posted by ceri View Post
Did you use the right hose? If you did, there's no way seafoam would get into the brake booster. You remove that hose from the brake booster and that hose feeds into the engine.
No, I did not use that hose - I connected a short piece of smaller hose to the accessory port on the booster check valve. That's what others have recommended. In hindsite, I would do it your way if ever again.

I thought the Sea Foam would dry out pretty quick if any did get into the booster. Now I'm thinking there's a little pool of it down at the bottom eating a hole in the diaphram.

A week ago I was bragging about how good Sea Foam is. Ugh.



BTW - I only get the whistling noise the first time I apply the brakes after I start the truck. Once I'm going down the road it seems fine. Maybe just the check valve is bad?

Last edited by Jebb; 11-15-2010 at 04:06 PM.
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post #12 of 37 Old 11-16-2010, 06:49 AM
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Originally Posted by Jebb View Post
No, I did not use that hose - I connected a short piece of smaller hose to the accessory port on the booster check valve. That's what others have recommended. In hindsite, I would do it your way if ever again.

I thought the Sea Foam would dry out pretty quick if any did get into the booster. Now I'm thinking there's a little pool of it down at the bottom eating a hole in the diaphram.

A week ago I was bragging about how good Sea Foam is. Ugh.



BTW - I only get the whistling noise the first time I apply the brakes after I start the truck. Once I'm going down the road it seems fine. Maybe just the check valve is bad?
This is not the fault of the product( i.e. Seafoam ). It is operator error. The proper way to perform a treatment is to remove the main BB line and use it or your PCV line. The Seafoam is poured into the main BB line and sucked into the engine. As the other member pointed out there will be no back splash like effect upon restarting the engine either. If used appropraitely it is impossible to get any Seafoam inside your BB.

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post #13 of 37 Old 11-16-2010, 06:51 AM
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Originally Posted by Jebb View Post
Actually, I think it can happen quite easily. When the engine is running there is vacuum in the brake booster. When you feed enough fluid through that vacuum port to stall the engine (as it says to do) the residual vacuum in the booster can suck fluid back INTO the booster.

The makers of Sea Foam say it won't harm the diaphram but I'm not so sure. Seems like an awfully related coincidence. I hope I didn't create my own problem here.
You are not supposed to use the extra port on the BB fitting. You are supposed to remove and use the main BB line or the PCV line. When done properly there is no way any Seafoam will enter the BB. There is no vacuum in the BB when the main line is removed.

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post #14 of 37 Old 11-16-2010, 06:54 AM
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Originally Posted by Jebb View Post
No, I did not use that hose - I connected a short piece of smaller hose to the accessory port on the booster check valve. That's what others have recommended. In hindsite, I would do it your way if ever again.

I thought the Sea Foam would dry out pretty quick if any did get into the booster. Now I'm thinking there's a little pool of it down at the bottom eating a hole in the diaphram.

A week ago I was bragging about how good Sea Foam is. Ugh.



BTW - I only get the whistling noise the first time I apply the brakes after I start the truck. Once I'm going down the road it seems fine. Maybe just the check valve is bad?
There's your problem... That sucks.

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post #15 of 37 Old 11-16-2010, 08:24 AM Thread Starter
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Originally Posted by NHHEMI View Post
You are not supposed to use the extra port on the BB fitting. You are supposed to remove and use the main BB line or the PCV line. When done properly there is no way any Seafoam will enter the BB. There is no vacuum in the BB when the main line is removed.
Understand. Now, if the Sea Foam got down into the booster, from the way I did it, could it have damaged the diaphram?

As far as I can tell now, it has a hole in it. It didn't two weeks ago.
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post #16 of 37 Old 11-16-2010, 08:36 AM
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Sounds like you need a new booster. And now you know the proper way to seafoam next time.

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post #17 of 37 Old 11-16-2010, 08:58 AM Thread Starter
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Sounds like you need a new booster. And now you know the proper way to seafoam next time.
Understand.

Now what about the Sea Foam FAQ that says,

"Sea Foam has been proven to be safe for use in all engines, both diesel and gasoline, and won’t harm gaskets, seals or other internal components of the engine, fuel system or oil system.

Their engineer says it won't hurt rubber parts. So why does it seem that it did?

I don't know RF, seems I could argue that Sea Foam owes me a new brake booster. If you read the posts above I'm not the only example.
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post #18 of 37 Old 11-16-2010, 09:10 AM
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Quote:
Originally Posted by Jebb View Post
Understand.

Now what about the Sea Foam FAQ that says,

"Sea Foam has been proven to be safe for use in all engines, both diesel and gasoline, and won’t harm gaskets, seals or other internal components of the engine, fuel system or oil system.

Their engineer says it won't hurt rubber parts. So why does it seem that it did?

I don't know RF, seems I could argue that Sea Foam owes me a new brake booster. If you read the posts above I'm not the only example.
this is true if you run it through your system, it wont cause damage in the short time its in your trucks system, they arent going to be liable for anything if i sat in your booster for 2 weeks, any cleaning chemical will eat anything rubber if left on it long enough, they will say you didnt use the proper technique and that it was user error, just because there is more than 1 person in the world that has done it doesnt mean its their fault you left the stuff in the booster, read the can it says do not leave in system for an extended period of time

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post #19 of 37 Old 11-16-2010, 09:24 AM
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Please Read the warning posted on their site for reference
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File Type: jpg seafoam2.JPG (197.1 KB, 13 views)

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post #20 of 37 Old 11-16-2010, 09:35 AM
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Originally Posted by Jebb View Post
Understand.

Now what about the Sea Foam FAQ that says,

"Sea Foam has been proven to be safe for use in all engines, both diesel and gasoline, and won’t harm gaskets, seals or other internal components of the engine, fuel system or oil system.

Their engineer says it won't hurt rubber parts. So why does it seem that it did?

I don't know RF, seems I could argue that Sea Foam owes me a new brake booster. If you read the posts above I'm not the only example.
Sorry to bring the bad news. I looked it up on rockauto.com and a new brake booster (A-1 Cardone brand) is $100.89 plus a $40 core charge for a 2004 hemi anyway. That's not horribly bad. I sort of expected $250-300. You might find one at a pick and pull for cheaper. I wouldn't expect many people go to the junkyard for brake boosters.

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