Cars
Posted: Thu May 10, 2007 2:06 pm
This is the general, all-purpose car thread, for talking about your car, asking questions about cars, or whatever the hell else.
I'm going to start us off with the promised pictures of my radiator. But first, some background:
A couple of years ago, I bought a used 1986 BMW 325e from a friend of mine, who had been modifying it for autocross racing. It was in great mechanical condition, but had several strange electrical problems [gas gauge didn't work, speedometer didn't work, a couple other indicators and functions didn't work]. It had what in Michigan, for a 20-year-old car, isn't a lot of rust, but more than most people would like to see on their cars. [I have a picture of the car from when I first bought it, but I forgot to bring that. I'll post it when I get to where it is.]
The previous owner bought it from a friend of his who is a BMW mechanic. [Still my mechanic, actually, when I don't just fix it myself.] Between the two of them, they'd put in a cold-air cone intake, drilled/slotted rotors and grippy pads, a performance chip, and some other miscellania like racing tires and rims. [Kind of "boy racer" rims, which I've never liked.] In short, it's the most fun car I've ever had the joy of driving. While slightly anemic on the power front - maybe 120hp? - it handles like nothing I've ever driven. The limit of speed in a corner is not the car; it's my balls, or lack thereof.
So I babied my car, going through the process of restoring her to mint condition. [And "original condition," as well, from an appearance standpoint: I wanted her to look like she'd just rolled off the factory floor, but drive like a racer.] I fixed the worst of the electrical problems, restored a lot of interior and exterior trim, and looked after her mechanically. I had very few problems: a few engine relays blew once, and I snapped the cable leading from the gas pedal to the engine throttle. I also tore off the exhaust while off-roading: with my winter tires on, the car's a fair imitation of a rally car [no surprise, since BMW raced them as such].
Last fall, though, while driving home in the middle of the night, I hit my first deer ever. [Which, after hundreds of thousands of backroads miles in Michigan, is a miracle and a testament to the teaching of my father.] I barely clipped her, and the damage wasn't extensive. All the damage, thankfully, was cosmetic, and after bending some body panels and doing some touch-ups, I was perfectly satisfied. She lacked her grille, and had a sort of sneer - the damage was all to the passenger-side front corner - but everything worked, and she finally looked like a car someone like me should drive: beaten.
Then I tore off the exhaust, and when I took it to Prestige - my shop - they told me some alarming news: all was not well on the mechanical front. The damage had pushed my radiator up against the engine fan, preventing it from turning, and doing damage to the radiator. They warned that if the fan was able to turn, it would tear the radiator apart. I scoffed: I'd been driving it like this for probably three months; if it was going to break, it would have.
I was wrong.
One day, on the way to work, I heard a horrible grinding noise. Not having learned my lesson from the blown engine in the Cadillac, I kept driving the remaining mile to work. Once there, I looked, and sure enough, there were tiny shards of radiator fin everywhere. The fan had turned, and now there was no stopping it. At least the damage to the radiator wasn't terminal: it didn't leak, and would end up cooling fine.
During the day, I tried various fixes, but with the tools on hand, there was nothing I could do. Flippantly, one of my co-workers suggested I just break the blades off the fan. Struck by this ingenuity, I did just that, and the problem was solved. For a couple of weeks.
Last week, I was driving out to my parents' house to pick up my daughter when my "low coolant" light came on. Having learned my lesson [finally] I stopped immediately. I wasn't worried, though: I leak antifreeze a little bit, and I hadn't added any in a while. So a top-off, and I'd be on my way. I opened my [delightfully reverse-opening] hood, and saw coolant everywhere. This didn't make any sense! I didn't have any leaks this large.
Then I noticed the radiator wasn't bolted to the top frame anymore. It had thus fallen backward...onto the jagged stumps of radiator fan.
Witness. [Different view.] Okay, beginning from the outside, with the "C ring," you can see the broad sweep where the fan blades ran over the surface of the fan, flattening fins but doing no structural damage. Moving inward, we reach the B ring, where the jagged stumps of fanblade, as well as the outer ring of the fan housing, ground into the actual coolant pipes, and within that, the C ring where the fan hub/clutch assembly wore through. I can't tell if it's damage in the B or C ring that actually did her in, but she's dead, Jim.
So I bought a new radiator, which isn't in yet, but in order to make it fit - because the damage bent this radiator, which is why it fit at all - I'll need to totally remove the fan, which means not only two large and expensive tools I don't own, but also that whenever I stop moving, no air will flow over the radiator. Which would be a bigger problem, if I ever stopped moving while driving. I tried to cut it off with a Dremel, but the Germans built her to last: I went through about 20 cutting disks before I gave up.
I've also removed the air conditioning, which removes a [non-functional] auxilliary fan and the impedance of the AC radiator, meaning air can now directly pour through, hopefully keeping things cool enough. I don't use the AC, anyway, and it's removal means an extra 3-5hp for not having to drive its compressor, and a major weight savings [probably 40-50lbs, at least, when it's all out.] Plus, the front end now looks...muscle-car-ish. And beaten. I love it.
So that's the story of my car, thus far, as promised. I'm sure I'll be back with more car stuff.
I'm going to start us off with the promised pictures of my radiator. But first, some background:
A couple of years ago, I bought a used 1986 BMW 325e from a friend of mine, who had been modifying it for autocross racing. It was in great mechanical condition, but had several strange electrical problems [gas gauge didn't work, speedometer didn't work, a couple other indicators and functions didn't work]. It had what in Michigan, for a 20-year-old car, isn't a lot of rust, but more than most people would like to see on their cars. [I have a picture of the car from when I first bought it, but I forgot to bring that. I'll post it when I get to where it is.]
The previous owner bought it from a friend of his who is a BMW mechanic. [Still my mechanic, actually, when I don't just fix it myself.] Between the two of them, they'd put in a cold-air cone intake, drilled/slotted rotors and grippy pads, a performance chip, and some other miscellania like racing tires and rims. [Kind of "boy racer" rims, which I've never liked.] In short, it's the most fun car I've ever had the joy of driving. While slightly anemic on the power front - maybe 120hp? - it handles like nothing I've ever driven. The limit of speed in a corner is not the car; it's my balls, or lack thereof.
So I babied my car, going through the process of restoring her to mint condition. [And "original condition," as well, from an appearance standpoint: I wanted her to look like she'd just rolled off the factory floor, but drive like a racer.] I fixed the worst of the electrical problems, restored a lot of interior and exterior trim, and looked after her mechanically. I had very few problems: a few engine relays blew once, and I snapped the cable leading from the gas pedal to the engine throttle. I also tore off the exhaust while off-roading: with my winter tires on, the car's a fair imitation of a rally car [no surprise, since BMW raced them as such].
Last fall, though, while driving home in the middle of the night, I hit my first deer ever. [Which, after hundreds of thousands of backroads miles in Michigan, is a miracle and a testament to the teaching of my father.] I barely clipped her, and the damage wasn't extensive. All the damage, thankfully, was cosmetic, and after bending some body panels and doing some touch-ups, I was perfectly satisfied. She lacked her grille, and had a sort of sneer - the damage was all to the passenger-side front corner - but everything worked, and she finally looked like a car someone like me should drive: beaten.
Then I tore off the exhaust, and when I took it to Prestige - my shop - they told me some alarming news: all was not well on the mechanical front. The damage had pushed my radiator up against the engine fan, preventing it from turning, and doing damage to the radiator. They warned that if the fan was able to turn, it would tear the radiator apart. I scoffed: I'd been driving it like this for probably three months; if it was going to break, it would have.
I was wrong.
One day, on the way to work, I heard a horrible grinding noise. Not having learned my lesson from the blown engine in the Cadillac, I kept driving the remaining mile to work. Once there, I looked, and sure enough, there were tiny shards of radiator fin everywhere. The fan had turned, and now there was no stopping it. At least the damage to the radiator wasn't terminal: it didn't leak, and would end up cooling fine.
During the day, I tried various fixes, but with the tools on hand, there was nothing I could do. Flippantly, one of my co-workers suggested I just break the blades off the fan. Struck by this ingenuity, I did just that, and the problem was solved. For a couple of weeks.
Last week, I was driving out to my parents' house to pick up my daughter when my "low coolant" light came on. Having learned my lesson [finally] I stopped immediately. I wasn't worried, though: I leak antifreeze a little bit, and I hadn't added any in a while. So a top-off, and I'd be on my way. I opened my [delightfully reverse-opening] hood, and saw coolant everywhere. This didn't make any sense! I didn't have any leaks this large.
Then I noticed the radiator wasn't bolted to the top frame anymore. It had thus fallen backward...onto the jagged stumps of radiator fan.
Witness. [Different view.] Okay, beginning from the outside, with the "C ring," you can see the broad sweep where the fan blades ran over the surface of the fan, flattening fins but doing no structural damage. Moving inward, we reach the B ring, where the jagged stumps of fanblade, as well as the outer ring of the fan housing, ground into the actual coolant pipes, and within that, the C ring where the fan hub/clutch assembly wore through. I can't tell if it's damage in the B or C ring that actually did her in, but she's dead, Jim.
So I bought a new radiator, which isn't in yet, but in order to make it fit - because the damage bent this radiator, which is why it fit at all - I'll need to totally remove the fan, which means not only two large and expensive tools I don't own, but also that whenever I stop moving, no air will flow over the radiator. Which would be a bigger problem, if I ever stopped moving while driving. I tried to cut it off with a Dremel, but the Germans built her to last: I went through about 20 cutting disks before I gave up.
I've also removed the air conditioning, which removes a [non-functional] auxilliary fan and the impedance of the AC radiator, meaning air can now directly pour through, hopefully keeping things cool enough. I don't use the AC, anyway, and it's removal means an extra 3-5hp for not having to drive its compressor, and a major weight savings [probably 40-50lbs, at least, when it's all out.] Plus, the front end now looks...muscle-car-ish. And beaten. I love it.
So that's the story of my car, thus far, as promised. I'm sure I'll be back with more car stuff.