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Is there a valve stem seal replacement sticky?
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Thread: Is there a valve stem seal replacement sticky?

  1. #1
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    Is there a valve stem seal replacement sticky?

    I am getting white oil burning smoke in the morning. It's not too bad, because it stops when the car has warmed up.

    I suspect it's the valve stem seals. How do I check for sure if that's what it is? I searched but can't find anything specific to Fiat 500

    I believe there are 16 seals. Is there a way to check which is leaking?

  2. #2
    Senior Member Fabio13's Avatar
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    First of all, did you pull off the engine cover and look underneath? The pcv valve o-ring usually needs replacement about every spark plug change. It’s where the pcv box attaches to the valve cover. That’s the usual oil leak.

    Or are you talking about smoke out the tailpipe? If white smoke, then check your coolant level.
    2013 Fiat 500 Sport AT, Xpel Ultimate Clear Bra, 3M Crystalline Window Tint, Black top stripes, Black "500" (wide) side stripes. Fiat "500" Stainless door sills by Mopar. BlueTooth music streaming. OBDII BlueTooth Torque gauges streaming to smart phone. BF Goodrich Sport Comp II tires, STS rear sway bar, Euro+Drive NA 500 Tune, BMC reusable air filter and Spare Tyre with cover.

    Blast to drive! 25 years newer than last car!

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    Pcv is changed and fresh, all the spark pkug wells are dry. It was thw first thing I checked.

    The smoke is coming from the exhaust. The smoke smells like burned oil. It is more white than anything, but has a blue tint to it. The oil seems to seep over night and burn off at first ignition. It is not water vapor or coolant.

    Howndo I check which valve stem or cylinder has the leak? I think 8 of the valves - the ones close to the firewall - are fairly accessible. The other 8 are under the cam, which means timing belt removal...


    Is there a write up for this job? I can't find it..
    Last edited by mellowmaximo; 10-19-2020 at 09:44 AM.

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    Senior Member Fabio13's Avatar
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    I wasn't referring to the pcv valve but the o-ring between the box and the valve cover. Sounds like that isn't the issue. You don't say what year or model 500 you have for clarity to us readers. The camshaft operates the exhaust valves only. Maybe someone else could chime in from here. I have not been down that road. Good luck.
    2013 Fiat 500 Sport AT, Xpel Ultimate Clear Bra, 3M Crystalline Window Tint, Black top stripes, Black "500" (wide) side stripes. Fiat "500" Stainless door sills by Mopar. BlueTooth music streaming. OBDII BlueTooth Torque gauges streaming to smart phone. BF Goodrich Sport Comp II tires, STS rear sway bar, Euro+Drive NA 500 Tune, BMC reusable air filter and Spare Tyre with cover.

    Blast to drive! 25 years newer than last car!

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    Senior Member fast_dave's Avatar
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    @mellowmaximo

    Fabio13 makes a lot of good points

    Check it out: It helps us help you when you start by giving us the year and model of your 500.

    When you have a moment, can you add that info to either your Profile or Signature?

    OK - SUBJECT: Replacing Valve Stem Seals on a Multi-Air Head;
    I haven't seen a write up on this site, but I was interested in the subject, so I did a Google search and found that there is some info over on: www.fiatforum.com

    This has been done before, and there are those who said they did it with the head on, those who said they it was a bench job.
    There were those who claimed they did it without special tools, and those that claimed you needed special tools to remove/install the seals.
    Those that said it was similar to a VW 16 valve head, those that said it wasn't the same as a VW 16 valve head due to the Multi-Air system.
    Round it out with loads of back and forth banter as to the fine details of getting the job done...

    Keep in mind there is also a lot of talk that if your 500's head has reached the point to where the valve seals have worn out, more than likely the valve guides are also worn out, so don't bother doing one repair without doing the other repair at the same time. There are many, many references to this...

    Meaning that there is a gamble that if you ONLY replace the valve stem seals, more than likely you'll be re-visiting the repair a little ways down the line to replace the valve guides AND valve stem seals (again).

    I get the impression that some of the guys that wanted to ONLY replace the valve stem seals were car flippers that wanted a "quick fix" on a high mile car (with a good body) to just get the car Passing Smog and then SOLD for a handsome profit. A couple of thousand miles later the problem would be the car's next (unfortunate) owner...

    Overall - You'll definitely have a lot to read through and wonder if this foray will be worth it

    Hope all this helps - do a write up with pics if you move forward with this - it would be interesting to see what's in there and the process!!!!

    OK - with that said, I took a look at your Profile/Previous Posts, and found that you have previously written on 10/5/2020 "I have a 2012 Fiat 500 sport, 1.4L"

    Part #21 Valve Guide Seal - MOPAR (4892674AB)$4.99 Each
    NOTE: Replaces Part # 4892674AA

    Tasca Parts Link: http://www.tascaparts.com/v-2012-fia...haft-and-valve

    Valve Seal 2.JPG
    Valve Seal 1.JPG
    Last edited by fast_dave; 10-20-2020 at 02:19 PM.
    2012 Sport 5 speed Manual Trans, SPC Adjustable Front Camber Bolts, CorsaStrada Lower Front Chassis Brace, ST Rear Sway Bar, 205/45/16 Bridgestone Potenza RE760 Sport Tires

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    a 5:25min they remove the block to access the valves without removing the head.

    Yhe smoke I am getting out of the exhaust is intermittent. Most days it does not hapoen, but I had one day this week when the car looked like it exploaded. It was just engulfed in a massive cloud of smoke. So somehow, oil sometimes pools in one of the cylinders and is burned off during ignition. Right now, I'm doong a hail mary replacemebt of the Air oil separator and pcv. The car has 65k, it has not been abused, but I've onky had it since 50k. I doubt there's a way to replace the guides without removing the head. Thanks for your reply. I DID search othwr forums, but the threads I found were for a fiat punto.

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    Replacong the air oil separator solved the smoke problem. Was not the valve stems...phew..
    2012 Fiat 500 bought at 50k, now 65k.

    Daily driver. No mods. I run Castrol 5w-40 Mann filters.

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    Moderator map's Avatar
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    That is great news. I wonder if it was a faulty PCV... or just a bit of oil collected in the box.

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