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what's good for leaking valve stem seal? #1598889 09/13/09 02:35 PM
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daves66nova Offline OP
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95 Camry. I think that one or more of my stem seals leaks because when i first start up the car smokes.What can i use to stop this,besides auto-rx?


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Re: what's good for leaking valve stem seal? [Re: daves66nova] #1598899 09/13/09 02:40 PM
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ADFD1 Offline
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Not much, valve stems seals become hard like plastic, and often crack and fall apart. Aside from a thicker oil, a HM oil, or replacing the seals there isn't much you can do.

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Re: what's good for leaking valve stem seal? [Re: ADFD1] #1598904 09/13/09 02:43 PM
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daves66nova Offline OP
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a hm oil will help? does it soften the the stems?


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Re: what's good for leaking valve stem seal? [Re: daves66nova] #1598906 09/13/09 02:45 PM
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Colt45ws Offline
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It might. A big might. You could get lucky though. Might be worth a shot if you dont want to repair.


-Colton
2002 Ford Crown Vic PI 207k, Ex-Kootenai County, ID Unit #42
Down for engine swap
2003 Ford Crown Vic PI 86k
Pennzoil Conv HM 5W30, Fram XG2
Re: what's good for leaking valve stem seal? [Re: Colt45ws] #1598913 09/13/09 02:50 PM
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Quest Offline
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In addition to Onmo's suggestion, my take is that: "nothing can fix a valve stem seal leak unless you replace them, period".


"Internet discussion boards act as echo chambers for conspiracy dittoheads" A.Allen
Re: what's good for leaking valve stem seal? [Re: Quest] #1598933 09/13/09 03:06 PM
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StevieC Offline
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Not much will fix valve stem seals except replacement. HM oil and/or a thicker grade might be all that you can do.

frown


'18 Caravan - 40k KM - AMSOIL SS 0w20, Fram Ultra, TC-W3 500:1
'06 Santa Fe - 535k KM (Retired)

There is no such thing as "lifetime" fluids! mad
Re: what's good for leaking valve stem seal? [Re: StevieC] #1598947 09/13/09 03:19 PM
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bmwtechguy Offline
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Originally Posted By: StevieC
Not much will fix valve stem seals except replacement. HM oil and/or a thicker grade might be all that you can do.

frown


Maxlife 10W-40 has done the best for me with this type of issue. It is readily available in most places and on sale often or about $14 for 5 qt jug at WM.

Re: what's good for leaking valve stem seal? [Re: StevieC] #1598955 09/13/09 03:25 PM
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greenaccord02 Offline
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Well, everybody else pretty much said it, but I'd at least give a HM oil a try before bringing it for repair. You just never know.


  1. '95 Dakota 3.9L - M1 0W-40 - MC FL1A
  2. '97 Accord F22-B1 - M1 5W-30 - Bosch 3312
  3. '99 Camry 1MZ-FE - PP 5W-30 - M1-209
Re: what's good for leaking valve stem seal? [Re: greenaccord02] #1598970 09/13/09 03:37 PM
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noi8u Offline
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I see all the recommendations for a High Mileage Motor Oil. Are the additives really that good? The only pure synthetic HM oil I've seen is Mobil 1 and Valvoline Max Life. I wonder if the formula is any good since the M1is not SM certified and the 5w30 has a higher viscosity index than the 10w30or40 for both! Then I have to wonder why Mobil or Valvoline don't make a popular engine additive separately?

http://www.mobil.com/USA-English/Lubes/PDS/NAXXENPVLMOMobil_1_High_Mileage_Oil.asp

Last edited by noi8u; 09/13/09 03:48 PM.
Re: what's good for leaking valve stem seal? [Re: noi8u] #1599056 09/13/09 05:32 PM
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MONKEYMAN Offline
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I have some Maxlife engine protector bought at Big Lots. Looks like Valvoline does not make it anymore. I guess it was not that popular.


Truth alone triumphs, not untruth.

2017 Elantra SE
Re: what's good for leaking valve stem seal? [Re: MONKEYMAN] #1599093 09/13/09 06:31 PM
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94MaxGXE Offline
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Maxlife 5w30 completely stopped the same smoking at startup in my 99 Camry 4cyl.
It took about 10,000 miles.


99 Camry 144K SOLD
07 Accord 130K Miles
08 MazdaSpeed3 44K PP
10 Subaru Outback Gone
10 Mazda3s 95K
94 Nissan MaximaGXE 125K Sold
2012 Equinox 58K Gone
2016 Honda CR-V
Re: what's good for leaking valve stem seal? [Re: 94MaxGXE] #1601240 09/15/09 04:44 PM
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noi8u Offline
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Originally Posted By: 94MaxGXE
Maxlife 5w30 completely stopped the same smoking at startup in my 99 Camry 4cyl.
It took about 10,000 miles.


Now that's good intel.

Re: what's good for leaking valve stem seal? [Re: noi8u] #1601433 09/15/09 07:57 PM
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Nickdfresh Offline
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Valvoline designed MaxLife specifically for valve stem seals...

Re: what's good for leaking valve stem seal? [Re: Nickdfresh] #1601585 09/15/09 09:45 PM
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tom slick Offline
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I wonder what they use in Maxlife to "restore" valve stem seals. Viton is tough stuff and almost chemical proof. From my understanding you'd destroy it with any chemicals that would "soften" or "condition" it.


You get what you pay for...
So keep in mind how much you paid for this advice.
Re: what's good for leaking valve stem seal? [Re: MONKEYMAN] #1603555 09/17/09 11:16 PM
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bmwtechguy Offline
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SM oil is not always an indicator of the better quality oil for a particular application. SL sometimes means that a particular oil, such as M1 HM, simply has an older, higher (better) level of anti-wear additives such as ZDDP, which was limited even more for the newer SM oils of certain viscosities.

If an engine is leaking, common sense tells me to stay away from more expensive synthetics and use one of the HM blends, at least until the leak stops. Maxlife blend works great here. It works way better than some of the common stop leak additives, in my experience. I have less experience with the other HM oil brands.

Also, not all valve stem seals are made of Viton.

Last edited by bmwtechguy; 09/17/09 11:17 PM.
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