Re-establishing Oil Flow in Multi-Air “brick” after Long-Term Storage

multiair brick

multi-air “brick”

oil filter relief valve2

While inactive for an extended period*, some of Fiat’s 1.4 L engines have a tendency for almost ALL of the oil to drain out of the top-half of the engine, including the high pressure oil pump and the hydraulic pumping elements in the Multi-Air “brick” that are operated by the intake lobes on the camshaft, that all need enough oil (without air) flowing to feed the actuators used to properly control the fully variable lift of all eight intake valves.

The only way to re-establish consistent oil flow in the pump(s) again, so that the engine will actually run, is to “prime” them (getting the air out of the system) by turning the engine over with the starter (which cycles the primary oil pump delivering oil back into the top-half of the engine), making sure to pause once in awhile, long enough to prevent the starter motor from overheating.

Here is the actual “Extended Park Starting” procedure from the Owner’s Manual:

NOTE: Extended Park condition occurs when the vehicle has not been started or driven for at least 30 days.
1. Install a battery charger or jumper cables to the battery to ensure a full battery charge during the crank cycle.
2. Cycle the ignition to the START mode and release it when the engine starts.
3. If the engine fails to start within 10 to 15 seconds, cycle the ignition to the OFF mode, wait five seconds to allow the starter to cool, then repeat the Extended Park Starting procedure.
4. If the engine fails to start after eight attempts, allow the starter to cool for at least 10 minutes, then repeat the procedure.

Tip #1

Upon determining that you will be performing this ritual (after the first pause to cool down the starter), it might be best to temporarily remove the fuse for the fuel pump (F34) for a few cycles, to avoid flooding the cylinders.  Hopefully, all systems are go, once you reinsert the fuse and resume starting  –  VROOOM.

It has even been suggested that you leave the fuse out all winter, since the primary concern with periodic starting is condensation, and periodically crank the engine until it sounds normal, rather than “free-spinning”, to keep oil in the Multi-Air brick.

Tip #2

One seldom mentioned  tip (hasn’t been officially confirmed) to speed up the upwards oil flow while the starter is turning the engine over, is to have someone engage an air-relief valve “button” that is said to be accessible by removing the oil filler cap (indicated by the orange oval in my photo), while you are pressing the start button.  m7art states that it appears as a 5 mm black dot, and simply needs to be pushed down with perhaps a Phillips screwdriver, in order to allow trapped air to exit.  Last December, #Greg from Eurocompulsion was going to look into this further, but hasn’t yet been able to confirm.  Having looked myself, I’m not getting a good feeling that there is a button there either, so I’m hoping someone will confirm – either yay or nay.  I’ve drawn an arrow to the spot that I think has the greatest possibility, but since that area is submerged in oil in my engine, I can’t tell for sure.

Tip #3

Another tip that jbbdc posted today after a positive outcome, is to extract oil out through the dipstick tube, and either pouring it back in through the oil filler port (insuring it is at least as clean as it was within the engine), or simply replacing the same amount with new 5W-40 oil.  He later stated that he only needed to extract/pour-back a half-quart to get the desired outcome, assisting in the priming of the oil pump.  Although more of a hassle for some, I’m confident that extracting the oil via the drain plug would be just as effective, as the benefit comes from catching some of the oil in the top half of the engine, as it is poured into the filler port, but all that effort for only a half-quart?  You could however, take the opportunity to perform a full oil change, if the timing is appropriate…

Tip #4

Greg (Eurocompulsion) offered this tip as well:

1. Disconnect the Throttle’s electrical connection
2. Crank engine over until throttle light goes out (about 5-10 seconds of cranking)
3. Connect throttle
4. Start engine

We’ll see if it helped lynk26 get his car started after sitting for 2 months and having tried everything but tip #1.

Tip #5

On 2/18/2019, BillaVista published his Canadian Owner’s Manual advice, which seems to follow along the lines of Tips #1 and #4, in a much easier fashion:

1. Hold the Accelerator Pedal wide open during cranking to cut off fuel and avoid flooding
2. After the first few cycles, release the Accelerator Pedal to allow fuel for engine starting

Tip #6

On 5/3/2019, Jaybo published what is reported to be Fiat’s official solution – bleeding air out of the oil pump via the ‘Possible Oil Pump Priming Point’, located on the bottom of the engine underneath the oil filter and adjacent to the oil pressure sensor.

oil pump priming point

 

Questions to ponder…

  • So why are only a few experiencing this condition?
  • What is allowing oil to drain out of the top-half of the engine?
  • Poor compression in at least one of the cylinders?
  • Why does it seem to be mostly Abarth owners?
  • Are the engines in question, not being broke in properly?
  • Even if the owner treats the car properly, are others (dealer personnel, potential customers doing Rally test drives, etc.) abusing the car in it’s first few miles, before the customer gets the keys?
  • Should this issue be escalated at the dealer for warranty repair if the oil drains out in, say under 2 weeks?
  • Customers that indeed have compression issues, are probably entitled to a new engine – is this issue a precursor predictor of that?

*   Ideally, if you have an engine that displays this condition, and you wish to avoid the consuming, oil flow re-establishment process, you will simply have to start it often enough to keep the brick’s oil pump primed with sufficient oil.  For some, that period of time is less than a month (perhaps every 3 weeks), yet for me, I’ve gone over 2 months (during it’s first winter) and thus far, have had no problem starting my car.

fiats-multiair-valve-lift-system-explained-photo-301273-s-original

courtesy of BRYAN CHRISTIE DESIGN

9 thoughts on “Re-establishing Oil Flow in Multi-Air “brick” after Long-Term Storage

  1. Hi All,
    I find this interesting and nice to know. Because I enjoy understanding how things work, I wanted to raise a question to clarify my understanding. Since the oil pressure is used to open the valves, when this situation occurs, wouldn’t the intake valves stay fully closed while cranking?

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  2. Per Scot Manna, I think you are correct, and steve6225 perhaps got it wrong, but nevertheless, several posters have stated the engine feels as if there is no compression while cranking in this situation. Scot states “Sitting directly above the intake valves on the cylinder head is the Multi-Air actuator, often called the “brick”. A look at the camshaft reveals there are three lobes per cylinder, two identical exhaust lobes and a single intake lobe that operates a follower which moves a piston in and out of a bore in the Multi-Air actuator – this is the high pressure oil pump. The stroking movement of this piston pressurizes engine oil that will be directed to a hydraulic piston, which will open the intake valve.”

    He further states “Service manual information lists the intake valve lobe lift at .145 inch or 3.81 mm. In actuality, due to rocker arm ratio and hydraulic system multiplication the actual intake valve lift [can be as much as] .370 inch or 9.3 mm. “, implying to me that the valves don’t remain closed when there is no oil pressure, but that they open a minimal amount.

    Liked by 1 person

  3. I ran into a couple at a Fiat get together who had this issue. They told me that the Fiat mechanics at the dealer told them the air relief valve under the oil cap was indeed a procedure to assist in this situation. So they (in a round about kind of way) confirmed the existence of the procedure.

    Liked by 1 person

  4. I removed my quote from steve6225, since I don’t now believe it is technically correct.

    As steve6225 states, “The oil drains out of the intake valve actuators and the valves go wide open, that’s why you have no compression.”

    Thank you #acandioty for getting me to study this some more, as I think I understand the topic better now, and I’ve rewritten the 1st 2 paragraphs in the name of accuracy. Essentially, it’s really about the pump losing it’s prime.

    Liked by 1 person

  5. I had the same problem with a 2017 Jeep Renegade 2.4 Tigershark MultiAir after sitting for almost a month. Turned over but wouldn’t start. Finally kicked over in about 5 minutes, after many tries. Both the Jeep and my newly acquired 2017 Spider Abarth will sit for longish periods as we do a lot of extended traveling.

    Thanks for the tips.

    Liked by 1 person

  6. I own a 2017 fiat spider and had the same starting problem. I had to call roadside assistance to have my spider taken to the Fiat dealer,very upsetting! They told me that the problem was caused by me not driving the car for a month and the oil drained out of the dual air system. I now start or drive the car every 2 weeks to avoid the problem.Seems to me this is a enginering problem that shouldn’t happen.I live in Pa. USA and don’t drive it much in the winter.I would like to sell the car,but am worried that this starting problem will happen to the buyer and will think i sold them a lemon.Very frustrating!

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  7. One thought that comes to mind — if there truly is an air-relief valve, as mentioned in Tip #2, perhaps the engines that are losing their prime is due to a bad valve seal, or insufficient spring pressure within that valve. I’ve never experienced the issue, and perhaps that is attributed to a good vacuum within the brick resulting from a properly functioning valve?

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  8. I just discovered Jaybo’s dealers’ resolution to this issue for his vehicle, and added as tip #6:

    On 5/3/2019, Jaybo published what is reported to be Fiat’s official solution – bleeding air out of the oil pump via the ‘Possible Oil Pump Priming Point’, located on the bottom of the engine underneath the oil filter and adjacent to the oil pressure sensor.

    Like

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