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#915994 - 06/07/07 09:53 AM Seafoam for sludge removal?
i_r_teh_noobz Offline


Registered: 05/01/07
Posts: 32
Loc: Ohio
Well, after pulling the PVC valve out of the 1.6L Nissan (116k miles) that I bought about a month ago, I think its safe to say that my engine needs a good cleaning. The engine side of the valve was a solid cake of sludge, and the vacuum hose was full of crust. I have yet to remove the valve cover, but I'm pretty sure it doesn't look very good.

I can't find Auto RX at my local parts stores, but Seafoam is pretty easy to find. Will this do the trick? Should I just run it in from a vacuum line, or do I need to try something else?
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1993 Nissan Sentra XE
1983 Oldsmobile Toronado

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#915995 - 06/07/07 10:10 AM Re: Seafoam for sludge removal? [Re: i_r_teh_noobz]
KC Strip Offline


Registered: 11/15/05
Posts: 288
Loc: KC Metro
FYI -

You won't find AutoRx in any parts store. I believe Frank said it is too cost prohibitive and then there's the training involved with each store's staff.

My experience with AutoRx has been fantastic! It's done a great job on both of our vehicles (Olds 3.1L with 180k & Suburban 5.7L with 110k). In fact, Frank's running a Father's Day special, so check out http://www.auto-rx.com for more details.
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#915996 - 06/07/07 01:34 PM Re: Seafoam for sludge removal? [Re: i_r_teh_noobz]
Merkava_4 Online   content


Registered: 01/30/07
Posts: 16971
Loc: Clovis, CA
I'd just pull the valve cover and just dump some lacquer thinner on the head and swish it around with a parts brush. You'll see the sludge liquify instantly. After that you'll definitely be needing an oil change.

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#915997 - 06/07/07 03:42 PM Re: Seafoam for sludge removal? [Re: Merkava_4]
Donald Offline


Registered: 03/21/04
Posts: 19491
Loc: Upstate NY
They ship Auto-Rx quickly, so I would order enough for two treatments and wait the day or two it takes to arrive.
_________________________
2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)


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#915998 - 06/07/07 07:25 PM Re: Seafoam for sludge removal? [Re: Donald]
Cicero17 Offline


Registered: 03/17/06
Posts: 212
Loc: Winlock, Washington
We used Seafoam in my son's 2000 Camry. We put 1/3 can in the oil, 1/3 in the gas tank and I still have the other 1/3. When we changed the oil a couple of hundred miles later at 3K on the oil, the oil was very dirty. The dipstick had a new shiny appearance. I don't think his engine had much sludge in it, but it took off the varnish from what I can tell. The oil was Supertech synthetic 5w-30. Yes, we still have some Walmart product around from my unenlightened days.

Don
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#915999 - 06/07/07 11:57 PM Re: Seafoam for sludge removal? [Re: Cicero17]
Donald Offline


Registered: 03/21/04
Posts: 19491
Loc: Upstate NY
I would NOT add Seafoam to the oil. Its mostly a solvent and good for the fuel system but not for lubricating.
_________________________
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2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)


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#916000 - 06/08/07 12:14 AM Re: Seafoam for sludge removal? [Re: Donald]
wileyE Offline


Registered: 11/18/04
Posts: 1967
Loc: Kitsap, WA
I got talked into putting a bottle in a auto transmission that was having some shifting issues. It knocked all kinds of stuff loose from every nook and cranny. The filter caught most of it but I found junk in the valve body when I cleaned it out. IMO, most the junk I knocked loose was better left hiding in corners.

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#916001 - 06/08/07 07:50 AM Re: Seafoam for sludge removal? [Re: Merkava_4]
M1Accord Offline


Registered: 05/26/07
Posts: 1536
Loc: Lost
Quote:

I'd just pull the valve cover and just dump some lacquer thinner on the head and swish it around with a parts brush. You'll see the sludge liquify instantly. After that you'll definitely be needing an oil change.




Would this cause the sludge to partly dissolve and drain back down toward the lower parts of the engine and block critical oil passage in the process?

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#916002 - 06/08/07 01:24 PM Re: Seafoam for sludge removal? [Re: M1Accord]
Merkava_4 Online   content


Registered: 01/30/07
Posts: 16971
Loc: Clovis, CA
Quote:

Quote:

I'd just pull the valve cover and just dump some lacquer thinner on the head and swish it around with a parts brush. You'll see the sludge liquify instantly. After that you'll definitely be needing an oil change.




Would this cause the sludge to partly dissolve and drain back down toward the lower parts of the engine and block critical oil passage in the process?




Not if you follow up with some mineral spirits. The mineral spirits won't evaporate easily like the lacquer thinner will; it'll keep the sludge liquified until you flush it out with a 20 minute OCI.

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#916003 - 06/10/07 06:16 AM Re: Seafoam for sludge removal? [Re: Merkava_4]
askani79705 Offline


Registered: 06/10/06
Posts: 384
Loc: midland tx
rotella T 5w40 and MMO.
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2017 Ford F150 NAPA syn 5w30 Fram 11955.
2000 Chevy 2500 Silverado PYB 5w30 AC Delco Filter

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#916004 - 06/10/07 07:35 AM Re: Seafoam for sludge removal? [Re: askani79705]
rsylvstr Offline


Registered: 01/01/07
Posts: 2422
Loc: Oneida County, NY
I'd run a few ARX cycles....I'm halfway through the first cycle on the F150 and civic and the second on the galant...love the mileage increase.
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2001 F150 SCrew Lariat 4X4 5.4L, 4R70W, LS 9.75" 3.55
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#916005 - 06/10/07 08:04 AM Re: Seafoam for sludge removal? USE NOTHING NOW [Re: rsylvstr]
unDummy Offline


Registered: 02/01/03
Posts: 8756
Loc: RI
Don't invest a penny into any OIL additives until you are sure that the engine runs well.
My recommendation is a bunch of 2-3k OCI's with whatever oil you want to use. If after ~10k miles and all sounds well, then consider something.

If you truly have sludge, your timing chain/tensioners are junk already.

Also, since I've seen some failed filter bypasses on older Nissans that use the PH3682-sized filter, consider the bypass-equipped PH3600.

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