Help...E34 high idle M30

[bmwpower]

Just got finished putting new timing chain on. Everything is back together fine, but when I start it up for the first time, the idle heads for the sky...like 4k before I shut it down. What would cause it to idle so high? I've tried multiple times.

Only weird things are there is no rear fluid yet, low brake fluid and I'm having trouble getting the trans elect connector all the way on (took it off for other reasons) - it's on, just the locking ring isn't all the way turned around.

Help?!?

<edit...got the trans connector back on>

[moroza]

What is rear fluid? Diff fluid?

This is just slightly educated guessing - IACV, AFM, throttle body (sticking cable?), possibly something electronic. How does it run at 4k? If it's fine, just too high, then a large number of things can be ruled out, it seems.

[bmwpower]

Yea, I cleaned the MAF and tested the ICV...both fine.
.....

figured it out.... m'fer.

The friggin cruise control cable popped out of the adjuster, so it was just barely pulling the cable back. Enough I guess to make it go to 4k...whew.

Good thing. I really didn't want to rip anything apart after all of that work.

[moroza]

Heh...I figured it'd be something stupid. Out of curiosity, why'd you replace the chain, and how hard was it?

[bmwpower]

Heh...I figured it'd be something stupid. Out of curiosity, why'd you replace the chain, and how hard was it?

I replaced it after I noticed the crank gear was getting kinda worn when I was replacing the oil pan gasket. Replace one thing in the system and you have to replace everything. So I did. About $300 in parts I believe. Timing and oil pump chain, both tensioners, cam gear, crank gear, oil pump gear, timing chain guide, all seals and other bits and pieces.

It wasn't too bad to do. You have to undo/torque the crank nut to 315 ft-lbs. I didn't have the tools to do it, so I had to track down someone who did. On the plus side, no more leaks up front from the lower timing cover.

[moroza]

That's a lot of torque. I thought the wheel bearings were tough with 290 (IIRC), but this is not only more, but I can't see how you'd do it without superhuman strength, or taking the engine out, since you can't stand on the breaker bar, or lift it against the floor. How much other stuff did you have to remove to access everything?

[bmwpower]

That's a lot of torque. I thought the wheel bearings were tough with 290 (IIRC), but this is not only more, but I can't see how you'd do it without superhuman strength, or taking the engine out, since you can't stand on the breaker bar, or lift it against the floor. How much other stuff did you have to remove to access everything?

You remove all the belts and pulleys on the crankshaft and water pump. Undo the A/C compressor from the bracket. Undo the power steering pump from the bracket. Undo the crank sensor.

Take off the valve cover. Take off the upper timing chain cover, which means you take off the wires, cap, rotor, rotor adapter.

You will also need the special crank holding tool to hold the crank stationary while you undo/retorque the crank nut. I said the hell with it and I bought it. Worked out well. It took me about 5 minutes to undo/retorque the nut with the special tool and a Snap-on 4 foot torque wrench.

When you undo the nut, place the holding tool against the underside of the left front frame (move the power steering pumpout of the way). When you retorque things, place the holding tool on the underside of the right front frame (more the A/C compressor out of the way).

I think that's about it.

I was doing the oil pan, too, so I had a lot more to undo as well.

[89polaris]

i replaced my head gasket about a month ago and also replaced some major timing components. to hold the hub i drilled a piece of mild steel out and welded a piece of harded steel onto it, put some bolts through into the hub, then used a 3/4" breaker bar and broke her loose. it was pretty ghetto but it worked

[strayts]

and a Snap-on 4 foot torque wrench.

did you borrow this from someone or do you own one? they're spendy :eek:

[bmwpower]

did you borrow this from someone or do you own one? they're spendy :eek:

I told you I borrowed it last week, remember? :)

[Racerhoze]

All this talk about a special tool to hold the crank... I had a buddy wedge a pry bar where the starter goes against the flywheel while I ripped that sucker loose. :stickoutt

[bmwpower]

All this talk about a special tool to hold the crank... I had a buddy wedge a pry bar where the starter goes against the flywheel while I ripped that sucker loose. :stickoutt

Yea, if you had a buddy to help, that would work. I had no buddy. :(

[strayts]

I told you I borrowed it last week, remember? :)

:nuts

oh yeah. i guess i'm just nervous about being able to find one to borrow when i get around to doing the job :D

[Racerhoze]

Yea, if you had a buddy to help, that would work. I had no buddy. :(

Find a homeless guy and give him like 10 bucks... = instant buddy