Probably not it, but when I swapped my trans, I had to take those two big bolts holding the starter out and I didn't put 'em back in tight enough. It cranked really slowly and didn't start, but I didn't try more than cranking for a few seconds. Just tightened up those bolts real tight and it was back to normal. It's worth a shot.

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1983 240D 3.0T 4-speed manual, now sold

1989 Subaru GL Wagon 5-speed Touring Edition