"Urambo Tauro" (urambotauro)
12/11/2017 at 12:00 • Filed to: saab 900, project, wrenching
2
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"Urambo Tauro" (urambotauro)
12/11/2017 at 12:00 • Filed to: saab 900, project, wrenching | 2
| 6 |
Backside of harmonic balancer/crank pulley assembly, with oil seal and trigger plate attached
Delays, delays... maybe we should have seen this one coming, though.
So it turns out that crank sensors for these cars are !!!error: Indecipherable SUB-paragraph formatting!!! . But !!!error: Indecipherable SUB-paragraph formatting!!! has a solution. They managed to track down the OE supplier and now offer the guts of the sensor assembly. No bracket, no connector, just the core pellet with some wires sticking out. It’ll need to be spliced in.
Old crank sensor disassembled, new one ready to swap in
But before ordering that sensor, my brother made sure to yank the belts off of the engine and confirm that yes, of course we should definitely replace them. He also found an idler pulley that rotates rather... crunchily. Good catch!
One of the old cracked belts vs new replacement
New idler pulley installed on its bracket
Well, here we are: the parts came in, and my brother managed to weasel the crank pulleys off. (Better his knuckles than mine haha. Saab’s placing of the “front” of the engine up against the firewall sure is a pain in the neck.) But that’s when we realized that maybe he should have ordered a harmonic balancer, too. The rubber insert is hardened and cracking, and we don’t want to have to take this back apart again any time soon to deal with it.
Harmonic balancer/pulley assembly
So boom goes the parts cannon, again. Maybe we’ll have the !!!error: Indecipherable SUB-paragraph formatting!!! again next weekend? Maybe?
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Urambo Tauro
> Urambo Tauro
12/11/2017 at 12:04 |
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Anybody got any tips for splicing really small wires together?
diplodicus
> Urambo Tauro
12/11/2017 at 12:36 |
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What are you using? Butt splices? or just soldering?
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Urambo Tauro
> diplodicus
12/11/2017 at 12:40 |
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Haven’t decided yet. The wires are -I don’t know- 22g or something like that.
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diplodicus
> Urambo Tauro
12/11/2017 at 12:50 |
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Solder is probably best long term as long as its not going to be getting bent. Just make sure you don’t cut any strands when stripping the wire. Or you could go with something like this https://www.mouser.com/ProductDetail/TE-Connectivity-Buchanan/1776293-3/?qs=sGAEpiMZZMsntO7gZZwOWAKAhgHRm%2fluHZH0iui%252bf4E%3d If you’ve got enough wire to make it from the sensor mount to somewhere you can mount that block.
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Urambo Tauro
> diplodicus
12/11/2017 at 13:00 |
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Nah, I don’t want to use a block. The head of the sensor mounts near the crankshaft on the “front” of the engine block, and the wires (inside a sleeve) are routed upward from there (behind the belts), underneath the intake, then out the side near the dipstick. There’s nowhere to conveniently mount a terminal block, and I want to be able to seal the splices with heat-shrink.
Funny thing is, it almost doesn’t need a splice. The wires come up just 2 inches short of the original. So close...
Noah - Now with more boost.
> Urambo Tauro
12/11/2017 at 13:35 |
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Parts cannon delays are the worst. I’m currently waiting on a set of spacers that were out of stock in the 2 biggest retailers.