Winter maintenance project 4.6is

[bcredliner]

Originally Posted by X53Jay4.8is

Why would BMW offer two types of tensioners and only one part number?

They discontinued the original one and replaced it with the longer version. I don't remember if part number changed or not.

[X53Jay4.8is]

Originally Posted by bcredliner

They discontinued the original one and replaced it with the longer version. I don't remember if part number changed or not.

So I would imagine that the part number would have to have changed for it to be a longer unit. So if you ordered a tensioner today from BMW dealer you should be supplied with the upgraded replacement tensioner.

Okay for additional clarity. I went ahead and looked up the part number for my BMW X5 4.6is and the tensioner that they show by part number: 11317531813 is the newer revised version because when you click on the part number information icon in BMWFans it shows the old discontinued tensioner that was produced from December 91 to June 2003. This part number was 11311736023

[jontezan]

Originally Posted by X53Jay4.8is

So I would imagine that the part number would have to have changed for it to be a longer unit. So if you ordered a tensioner today from BMW dealer you should be supplied with the upgraded replacement tensioner.



Okay for additional clarity. I went ahead and looked up the part number for my BMW X5 4.6is and the tensioner that they show by part number: 11317531813 is the newer revised version because when you click on the part number information icon in BMWFans it shows the old discontinued tensioner that was produced from December 91 to June 2003. This part number was 11311736023

Found this on bimmerforum, seems that the difference is the spring. Otherwise i think the parts looks the same 😄


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[jontezan]

Engine picture of the day😄 waterpump, thermostat, waterpipes and main serpentinebelt mounted 👍 it is going to be nerv wrecking, when i start this again 😎


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[jontezan]

Another assebly pic, getting closer to startup. Tomorrow i am going to sandblast the valvecovers and wipe clean the wirings 👍


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[jontezan]

Beaing confident, put the whole enginebay together. Hold your thumbs that i got the timing bit right. Now i need engine oil, coolant and some powersteering oil. Btw is it ok to use bmw ll-04 5w30? 👍😄


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[bcredliner]

You can use any synthetic oil that meets or exceeds factory specifications. 5-30 is fine.

[jontezan]

Ok thx. Btw the car has been in the garage for almost 2 months now, and the rear end of the car has lowered to about half of its usual ride height, do i need to worry about that? 😄


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[bcredliner]

System is sealed so it should not bleed out but I wouldn't do anything about it yet. Once you get it running see if it goes back to normal height. Assuming it does, let it sit overnight and see how much it drops. May not be leaking enough to have to do something right away but do have to address it before the compressor starts running too much of the time. Will have to do some troubleshooting to be sure which component(s) are leaking.

[jontezan]

Originally Posted by bcredliner

System is sealed so it should not bleed out but I wouldn't do anything about it yet. Once you get it running see if it goes back to normal height. Assuming it does, let it sit overnight and see how much it drops. May not be leaking enough to have to do something right away but do have to address it before the compressor starts running too much of the time. Will have to do some troubleshooting to be sure which component(s) are leaking.

Over night it doesnt drop anything, atleast not when i have driven it. If the air bags should go completely out of air, is there any chance the take damage from that? I have checked the air struts, last summer to see if there was som dry cracks in the rubber, but they looked nice.


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