1 2 3 4
Hoondavan
Hoondavan Reader
9/8/18 8:51 a.m.

I sold my engine hoist this week.  Fingers crossed I won't need it anytime soon.  Paid $125 form Harbor Freight (25% off coupon + Sale), sold it for $100.

They guy who bought it is actually using it to pull stumps from his yard.  Genius!   

 

Hoondavan
Hoondavan Reader
9/16/18 6:58 p.m.

I'd really like to get the AC working.  I bought a fancy can of R134 refrigerant with a gauge, but the compressor isn't engaging.  The instructions on the can of R134 say if the compressor won't engage, empty 1/2 the can in the low pressure side.  I'm a little hesitant to do this, since the gauge shows the pressure in the red-zone...it makes me a bit nervous to empty the can.  Instructions aren't clear.

The wires to the compressor clutch look a bit frayed.  This, or the diode, could definitely be the issue...  This wire also may be difficult to track down...I don't see it in RealOEM.com

 

Hoondavan
Hoondavan Reader
9/22/18 4:36 p.m.

So the AC compressor wasn't engaging.  The wires and diode on the compressor look terrible, but since I couldn't find a part #for just the wires...or even just the compressor clutch I figured I should check everything else before spending any time or money on the compressor. 

There is supposed to be a sensor at the high side of the AC line, the low side of the AC line, and a sensor on the radiator.  With the car running and the AC on max, I pulled the sensor on the low-side line and used a wire to jump the plug (complete the circuit).  No change, the compressor wouldn't engage.   

I ran a wire from the battery and jumped the compressor plug with it...and the compressor engaged.  I engaged the compressor for short intervals while I topped off the refrigerant w/R134. It was in range w/roughly 1/2 can...so it definitely wasn't empty.

I pulled the plug from the radiator.  The bbn plug has three wires on it.  Jumping two would engage the compressor, jumping the two other plugs would engage the aux cooling fan.  Unfortunately, the plug came apart in my hands when I pulled it from the radiator.  I'm hoping this plug was faulty, which was keeping the AC clutch from engaging.  I can't tell how to put it back together.  Maybe I can find a good reference online.

There's an e E30 In the junkyard not too far away.  Hopefully the plug is the same and I can just splice the wires together.

 

 

 

Hoondavan
Hoondavan Reader
9/22/18 4:50 p.m.

Found it!  

Hoondavan
Hoondavan Reader
9/23/18 7:08 p.m.

LKQ pick-a-part was a bust.  The E30 they had looked great in the pictures, but they only showed the good angles.  No radiator or sensors.  Car was a mess, and everything usable had been picked through.  There was a sport steering wheel in the pictures.  Someone destroyed it while removing some other parts..  That, and the fact the entire passenger side of the car and windshield were missing...it had been rained on for the last two months.

I did manage to pull the same sensor from an E36.  Same sensor, but different plug.  I spliced the wires and installed it.. and no luck.  AC compressor won't engage unless I jump the wires on the radiator sensor.  It does blow ice cold though...

I'm going to have to go through the Bentley book again...I'm not sure how that all translates to the M42 engine though...the book was written for the M10 and M20s.  The fuse-box diagrams don't even translate.  I'll check the fuse box again.

The aux cooling fan does turn on low when the AC is on.  The wires on the actual compressor look frayed...but that can't be a factor since it'll still fire when the temp plug is jumped, right?

I will be replacing the thermostat.  The car takes a long time to warm up.  The temp seems to stay around the 1/4 mark...and takes a long time to get near the middle.  I can't see how that could impact the compressor engaging.  Since I know i'll need to bleed the coolant after replacing the sensor in the radiator, now's a good time to replace that.

 

Hoondavan
Hoondavan Reader
9/28/18 10:45 p.m.

Started tearing down the bottom end of the M42 in an effort to figure out why it exploded.  The oil pickup was still in place (common failure point).  With the old motor upside down, it became pretty clear why it died.  There were scrapes on the lower oil pan and what also looks like a crack.  Pretty sure this was run out of oil due to the cracked pan.  Once the engine was upside down I removed the pistons. There was definitely still a burnt smell. Months later, still smells burnt.  There's zero doubt this engine went dry and fried a bearing or two.

It's kind of neat to take an engine apart for the first time.  Turns out there were TWO holes in the block.  Both sides of CYL #2.  

I suppose this is why you need to check your oil level often if you drive a car this low.

 

Hoondavan
Hoondavan Reader
10/3/18 4:06 p.m.

So I've decided not to compete in the Challenge.  Frankly, since I've had the car running I've spent a lot of time fiddling and fixing little stuff and not much time driving it.  While I think the car is in fine shape to drive to Gainesville, I don't have a ton of confidence it'll be able to drive home after two days of thrashing. I've also had some family commitment pop up that would take back flips to manage if I spent two days at the Challenge.  The other issue is that the car is leaking oil from the pan gasket and I'll be traveling for work for the next week or so.  There's also the issue with one of the tires having some pretty bad camber wear.  They're not the right size for the car and they're economy-brand...so I was planning to replace them anyway.  Anyone selling 205/55/15 tires?  I'd also consider 14 inch e30 wheels & tires.

Lots of excuses, I know.  I'm hoping to make it out to the challenge as a spectator for at least an afternoon.

I'm regretting my decision to forgo RTV when I was replacing the gasket.  I'll double-check the torque on the nuts before tearing it apart...but there's a chance I didn't clean off the surfaces well enough.  It's probably fine for driving around, but I'd hate to leave oil on an auto-x course.

Hoondavan
Hoondavan Reader
10/16/18 5:37 p.m.

I started this project with the goal of learning some new skills, and to build a car I wanted to own (again) but couldn't justify the cost of buying.  I jumped two feet in expecting a major project, and was not disappointed.  I have a greater appreciation for the thought process, research, planning, and know-how needed to undertake a big project.  I also have a profound respect for those of you who have spent years accumulating an encyclopedic knowledge about the cars you've wrenched on.  There are things I've spent hours reading about and struggling with that are second-nature to some people.  Not that I'm quite done with this project, but next time around, everything will be easier (at least a little). 

The coolant leak I thought I had chased down had resurfaced underneath the intake.  The rubber gasket on the heater outlet pipe was in rough shape.  I should have replaced the whole fitting before putting the engine inside the car.  It's now been replaced and it's not leaking.  

I replaced the oil pan gasket (again) and used a light coating of RTV.  Unfortunately, there's still two drops of oil collecting on the bottom of the oil pan.  I suspect it could be the oil filter housing, but I'll need to chase this one down, for sure.  This does not make me happy.

I sold the solid motor mounts I had installed and bought a Sport steering wheel on ebay.  It was cheap because the leather was shot...but I removed the leather and it looks (almost) new again!   The horn isn't working, so at some point I'll have to figure that out.  The speedometer still reads ~10mph higher than it should and the odometer gears need to be replaced. The tires should make the speed run 3% higher...not 20%.  I haven't tried to research this issue yet.

The one big success I can claim is that the AC is now functioning (important in FL).  I found a good troubleshooting document and used a multimeter to confirm my AC button wasn't working correctly.  I disassembled it and cleaned it but that didn't fix the issue.  I was lucky enough to find a like-new AC switch and evap temp switch at a junkyard for $8 (boh!) instead of the $100 a new one would cost.  They go for $50 on ebay, so kind of regret I didn't grab the second one I saw as well.  I also found a blown fuse (I'm certain that wasn't there before).  

There were a set of decent looking 14" basketweave wheels at the junkyard. 3 wheels on teh ground, one wheel still on the car just wouldn't budge.  At least 3 bolts were seized  That explains why the others were removed and the one was still on the car.  Someone also took a big hunk out of the wheel while trying to remove it...which made me sad.   It's surprising how many things in junkyards are trashed needlessly. There was also a mint OEM stereo when I was there the first time.  I went back the next week to get the stereo and the wheels.  Unfortunately, both cars had been mostly stripped.  Lesson learned.  Also, don't forget your breaker bar.

I did grab a high-low temp sensor wire from the junkyard E30...spliced it back to the same wires from where my plug fell apart.  I bought a soldering gun and connected the wires properly with heat-shrink and then black tape.  I've been meaning to buy a soldering iron for a long time.

I took the BMW for an extended test drive last night.  The steering feels really light and pretty sensitive.  I wonder if this car has a Z3 rack, I'll have to check the tag on it.  The M42 lugs around town like a typical 1.8L motor, except when it's revving.  It does make great sounds and  has plenty of power at the upper range of the rev limit.  The thing I don't like is the fact most roads in NE FL are pretty straight and boring...not exactly ideal for a lightweight high-revving car.   I do have someone who may be interested in trading an AW11 MR2 for my wife's Bronco....which is tempting.

I replaced all of the shifter bushings while I had the transmission out, and wasn't immediately happy with the results...partly because I had the shift lever angled the wrong way so it was nearly hitting the on the front of the console.  I have long arms, so it took me a while to figure out what went wrong.  Luckily I could access the linkage without removing the driveshaft and spin it back 180 degrees so it's angled the right direction.  This made a huge difference.  I was debating getting a Z3 lever (short shift), but the shift action is pretty darn good as-is.

The dripping oil is going to drive me nuts.  

Hoondavan
Hoondavan Reader
11/3/18 9:34 p.m.

Every time I fix one thing, I find two more things to fix.  The muffler shop that switched mufflers for me didn't hang the exhaust as high as they should have.  I tucked the exhaust where it should be and welded the hanger in place.  

In an effort to get the ride height a little higher, i replaced the rear lower spring pads with thicker pads.  The original ones were pretty much worn all the way through.  This made a big difference. Pretty sure the rear is exactly where I want it.  The front is a whole lot more involved, so I won't likely do that anytime soon.  I really hope I can now get in my carport without scraping the resonator.

Unfortunatley, i while I was under the driver's side of the car I smelled gas.  Upon closer inspection, one of the rubber lines by the filter had split and was leaking.  I'm not surprised, since the car seemed to be using a lot of gas.  It was evaporating quick enough that you couldn't see it unless the car had just been running.  6ft of hose and a new filter, and it's nearly done.  Turns out, the new hose kinks easier than the old line...even though the kinked section was the same exact length as the one ut replaced. I'll need to buy one more foot of hose to wrap it up.

Two weeks ago I found the fuel pump gasket would leak if I parked on a hill, I sanded the surface snooth (rust) and replaced that gasket last week.  I'm just glad I didn't have to replace the tank.

 

 

1 2 3 4
Our Preferred Partners
TLdxzkqnCL4sdkf6lkgBvP3yYXZrHbZIkfO0s4OJVHnlWtLrpyglDmySypMtki1g