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Author Topic: Smoking after engine braking  (Read 1758 times)

Offline shadyracer

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Re: Smoking after engine braking
« Reply #15 on: May 08, 2020, 02:58:52 am »
Good compression readings, does suggest valve stem seals, you could try a seal conditioner oil additive to soften the seals, not sure but might help, forte branded products are favoured by the motor trade around me.
How much oil does it use monthly? More than a litre? Does it sit in traffic idling often?

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    Offline Elmo2002

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    Re: Smoking after engine braking
    « Reply #16 on: May 08, 2020, 07:02:06 am »
    I may try the additive then and see what happens. I have a 40mile commute to work mainly A roads and motorway. The only time it's sat in traffic is on the way home for around 10 to 15 mins, but that's still moving just slowly.

    Would the stem seals not cause it to smoke on start up or after long periods of idling?
    I carried out an oil change 8 weeks ago and it has dropped from halfway on the dip stick to just above the minimum.

    Offline 124Abarthreplica

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    Re: Smoking after engine braking
    « Reply #17 on: May 08, 2020, 09:18:04 am »
    Just out of interest, what oil did you use?

    Offline Elmo2002

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    Re: Smoking after engine braking
    « Reply #18 on: May 08, 2020, 09:41:10 am »
    Just out of interest, what oil did you use?
    I used Selenia Abarth branded 10w50. From what I could see that was the right one for the car

    Offline TBliss

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    Re: Smoking after engine braking
    « Reply #19 on: May 08, 2020, 06:22:38 pm »
    Sounds like the turbine seal is slowly leaking which would cause your issues. Pull the housing and look for oil.

    Tim.

    Offline Elmo2002

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    Re: Smoking after engine braking
    « Reply #20 on: May 19, 2020, 08:31:42 am »
    So a little update, I have driven around 250 - 300 miles with Forte seal conditioner in and it has not made any difference. I have also been carrying out a few other tests.

    These are,
    Cold start after the car being sat for 5 days. No smoke on start up
    Long period of idle ~ 20 min from cold, then driven off. No smoke
    Long period of idle ~ 20 min after 1hr drive then drive off. No smoke
    Engine brake down long hill in 3rd, 4th, 5th gears drive after. Large plume of bluey white smoke that lingers and smells of burnt oil
    Coast down same hill with clutch in then drive after. No smoke

    Does this still sound like turbo oil seal?

    Offline 124Abarthreplica

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    Re: Smoking after engine braking
    « Reply #21 on: May 19, 2020, 09:32:28 am »
    I think you will have to remove the cylinder head to check valve stem clearance and fit new stem seals. :(

    Wise to get it crack tested whilst its off :thumb:

    Offline shadyracer

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    Re: Smoking after engine braking
    « Reply #22 on: May 19, 2020, 01:43:43 pm »
    Now Im not so sure its stem seals. I need to ask, has this only occurred since oil and filter change?
    Reason I ask is because if you drained oil sump but refitted sump plug before changing oil filter, then theres a possibility that the remaining oil in filter housing hasnt drained to sump and might lead to overfill, which would then possibly cause excess pressure on oil seals.
    Can you tell me part number of replacement oil filter you used and do you remember how many o rings you changed?

    Offline shadyracer

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    Re: Smoking after engine braking
    « Reply #23 on: May 19, 2020, 08:57:32 pm »
    Thinking more likely turbo on way as symptoms show only with turbo spooled up.

    Offline Elmo2002

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    Re: Smoking after engine braking
    « Reply #24 on: May 20, 2020, 09:13:10 am »
    Now Im not so sure its stem seals. I need to ask, has this only occurred since oil and filter change?
    Reason I ask is because if you drained oil sump but refitted sump plug before changing oil filter, then theres a possibility that the remaining oil in filter housing hasnt drained to sump and might lead to overfill, which would then possibly cause excess pressure on oil seals.
    Can you tell me part number of replacement oil filter you used and do you remember how many o rings you changed?
    To be honest I never noticed it before the oil / filter change, but then I wasn't really looking for it. Also I can't remember if the drain plug was out when I changed the filter. However I don't think that it is overfill as the oil is around 1/3 up the dip stick.
    I have no idea what the part number was sorry and pretty sure it was only 1 o ring that I changed. Is there more??

    Offline Elmo2002

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    Re: Smoking after engine braking
    « Reply #25 on: May 20, 2020, 09:16:05 am »
    How likely is it to be either of the stem seals or the turbo?
    My only problem is that they are both very big money items and if I get it wrong I don't have the money to do both  :( :-\

    Offline 124Abarthreplica

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    Re: Smoking after engine braking
    « Reply #26 on: May 20, 2020, 12:17:34 pm »
    One other thing, has the dip stick been changed?

    I know it has not but measure yours and I'll measure mine :whistle:

    Offline android_808

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    Re: Smoking after engine braking
    « Reply #27 on: May 20, 2020, 02:36:29 pm »
    Whilst your measuring, perhaps you could also let me know what colour handle you have on your dipstick.

    All my other Abarths have had either red or yellow from memory but my '69 Esseesse has baby blue. It matches absolutely nothing.  I don't know if thats why they've done it or if its just wrong but surrounded by yellow oil cap, red engine covers, black plastic etc, its just odd.

    Offline 124Abarthreplica

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    Re: Smoking after engine braking
    « Reply #28 on: May 20, 2020, 03:01:32 pm »
    Red handle

    52cm from base end to flange that stops the stick at the top

    Offline Elmo2002

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    Re: Smoking after engine braking
    « Reply #29 on: May 20, 2020, 04:18:30 pm »
    I can confirm that mine is also red and 52cm from bottom to the collar same as yours.

     

    hungry