Fiat 500 1.4L Non-Turbo Multi-Air Valve Box Unit Teardown.
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- čas přidán 22. 08. 2024
- After performing a tune up due to a rough & stumbling engine, it was discovered that cylinder 1 had a slightly stuck open intake valve, causing blow-back thru the throttle body.
Removing the valve cover and then removing the Multi-Air Valve Box it was discovered that one of the hydraulic intake valve actuators was stuck extended out.
Multi-Air Valve Box issues start at about the half-way mark.
If you have any info about these issues, please leave a comment so that I can get back to you.
A mechanic after my own heart. Mother in law bought a 2015 Dodge Dart 2.4L with Multi Air Codes on #3 cylinder within two weeks. I am confident there is a way to service these valves and solenoids despite the 'experts' claiming the whole unit must be replaced.
That basically an hydraulic tappet. 16 of mine were stuck with slugde and gunk. I opened them all, cleaned with degreaser and charged with oil before assembling them back. No tickticktick since the first start up. Make sure to use fully synthetic oil and keep on your regular oil changes.
Where you able to get the clips that hold the tappet together from anywhere ?
@@motorsandvoltsandrobots7162 It had all of mines. Really don't know where you could get those.
@@victorastacheva non serviceable …
I have dodge dart 2015 2.4l l have problem ….i have codes
P0304 cylinder 4 misfire.
P1064 cylinder 4 oil supply solenoid valve stuck .
P106B cylinder 4 oil supply solenoid valve switch on time out of range .
How solution?!
How replacement that , change all parts or what ?! plz help me
Hi i am trying to find this valve box for my Fiat 500 2012 that i have recently bought from a US auction and imported in Dubai, UAE and its not available. i have to import it from US any links please? 2 of the plungers and 1 sensor is damaged and needs replacement. appreciate your help
Is it possible the spring clip is for installation ease only? The tapper should be limited anyways by the cam once installed. Also having trouble finding exhaust valves for 2012 fiat, anyone know anything ? Thanks and great info here
I was having a code "oil too hot" i replace the brick,for a used one,and fix,the problem,
Hello. Thanks for showing this Multiair like opened. It helps me. Did you use the ideal oil ? often reason for damages.
After researching, I'm using Pennzoil Full Synthetic. I've read that different oils might cause an issue with the Multiair unit, but after closely watching and reading, most of the issues really seem to be dirty oil. Since I don't have a turbo, which really dirties the oil quicker, and I change oil every 3K miles, I believe that I'm good.
@@paulday4763 I am from Reunion island. My area is considered by FIAT like Europe. Fiat oil spec here is something very sharp. Not all oil factories has this oil. What oil specs shows your owner’s manual ?
Like you tell, your engine should be clean with care of bleeding you have.
@@bertrandmaunier1786 no
Interesting video. Ref the actuator that was stuck....could it be normal hydraulic lock as the solenoid valve might be closed. I understand that there are tiny bleed holes in the multiair unit cover which if blocked can prevent the plungers for returning. Also prior to failure had the engine been tapping?
Prior to total failure the engine stalled and had trouble starting a few times. There was no engine noise once running. The bleed holes were clear on the old unit.
How did you make out with finding a clip, what did you wind up doing to get the car back on the road?
I had to buy a new Multi-Air box. I had a second half video, but using a new camera app corrupted the SD card the video was on.
What little wrenches did u buy to remove intake manifold so as to avoid cutting the tab? I have leaking seals to the sparkplug and I was told need to replace vc gasket too.
The top two outer ones can be reached from on top very easily. The rest need to be removed from below, even the upper center one. A 3/8" rachet with several different lengths of swivel extensions and the proper socket. The swivel extensions allow the socket to grip evenly on the bolts. It helps if you have someone on top reaching down and holding the long extension while turning from below.
Once all the bolts are loose, push the intake manifold straight back as far as possible, being limited by wiring at the bottom by the starter.
Valve cover and multiair unit can be wiggled out to the side under the tab. When installing the valve cover with new seals, I did pull up on the tab to give a little more clearance. No leaks, and the engine is running great. Watch for a follow up video.
@@paulday4763 i have about 4ft of each swivel extensions 1/4, 3/8 and about 3ft of 1/2 so got that covered now finding out the bolt size i assume 5/16 or 10mm is common. I'll use 12point. I'll have the owner help me he's skinny to do reaching. Just have to wait til the engine is cold.
This is the hydraulic part that goes inside the multi air? MAXGEAR 17-0039
Hi, I have a problem with my Fiat Bravo II 2013 multiair 103kw. Occasionally I see the engine light and the car vibrates for a few seconds when throttle is applied. After a while, the vibrations stop and the car continues to run normally, but the engine light is still on. It is happening more and more often. The error is P1061.
Do you think I need to change the whole Multiair unit?
Thank you
Too general of information. Best have it checked by a qualified Fiat mechanic.
Did you ever get this back together & did cleaning the Multiair get the car running again?
After stumbling for about 5 minutes, it's been running like a champ since. 6K miles and just did a second oil change last week.
Really loved this video it was very informative….I was hopping you would show the rebuild as mine has the same issue as well…although less dramatic…P0303 Code..checked Coils & plugs ok..did compression and cylinder 3 is lower than the rest by some margin but not by half more like 3/4 low compared to full compression on the others…most thinking is either valve not closing properly…your explanation has been the closest to my thinking…how did you resolve the missing clip issue for the faulty multiair piston?
@@victorkuria8068 Never found the missing clip. Installed a new MAU along with new tuneup parts. Car ran rough at first. I believe that one of the intake valves became stuck open a little, creating backpressure in the intake manifold. After running rough for about 10 minute, the RPMs smoothed out and it's been running fine since.
dealer was no help, no individual parts the only option was to buy the complete unit new
Thanks for the video. I have cuestion I hope you can help me. I just buy a Fiat 500 and one of the solenoids looks damage. You know if there's a way to fixed or i have to replace the multiair module.
There's no way to repair/rebuild the Multiair unit that I know of at this time. I replaced the unit, bought from an online Fiat dealer for $1,200. Be sure to prime the unit with a hand oil pumper. Expect the engine to run very rough until all the air is worked out of the unit. Usually several minutes.
Very informative video. Do you still have your old VVT box? I'm in need of the top sandwich plate that has the bleeder check ball assembly. I damaged the bleeder in mine by not realizing how delicate the spring was. I would very much like to Purchase it from you if possible. Thanks!
Sorry, I don't have the old MAU anymore.
are you refering to the relief ball valve that everyone presses on with a screwdriver when it wont start?
y@@HhHh-vi9bq Sorry for the delay. Yes, that's what I was referring to.
i am bringing my pop back home from storage to put back together,,i have anothermau unit but the ball and spring were pushed through,, i bought this enging with a blown head gasket and low miles, i am looking into check valves for these units and am going to start buying up some engines for parts@@RobbVaughan2011
Still need it?
Would they be rockers and lifters?
A very shit motor in italy this motor in a punto evo broken the multiair especially with gpl ...this problem is less evidence in a Turbo multiair version because the air intake is cooled to the intercooler
elp me I have dodge dart 2015 2.4l l have problem ….i have codes
P0304 cylinder 4 misfire.
P1064 cylinder 4 oil supply solenoid valve stuck .
P106B cylinder 4 oil supply solenoid valve switch on time out of range .
How solution?!
And
P0113
P0522
Plz help ,am in UAE
Looks like you need to service/replace the Multi-Air Valve Box.
Ok if we say service what doing
For cylinder 4
Can a damaged multiair flood the cylinder with oil?
I don't believe that it can. I'd be looking at intake valve seals.
@@paulday4763 Thank you for the information. Regards.
Did you have to buy the 1200 dollar special tool to reinstall the multiair setup?
No. I put the unit in place and turned the bolts from the center out, alternating from side to side, 1/2 turn at a time.
You have to jiggle the unit into place as the bolts bring the unit down into place.
@@paulday4763 ok. Did you have to make sure the pistons were in half way up position ? I saw a video where the guys says none of the pistons can be at tdc.
@@onlyoneromeo
The pistons were never moved from when the unit was removed. The engine wasn't at TDC that I was aware of.
Go slowly and make sure the unit is setting down over the guide pins. You will see the springs slowly compress as you tighten the bolts.
@@onlyoneromeo
You don't have to worry about the valves opening and hitting the pistons because there's no oil in the unit to compress the valves open.
mine fell out too..... two of them.... does it still work with out the retainer clip?
I didn't try to run it with the missing clip. You might be able to create your own spring clip if you can find the correct diameter spring wire.
@paulday4763 I am curious as to whether or not you got it running again. I currently have a customer vehicle with 4 or five of those actuators that fell out.