When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I just replaced the rear main seal in my truck. It's an 84 with the straight 6 (300ci) and it's 2WD with a C5 tranny. When I went to start the truck, the battery was dead. It was running just fine before I disconnected the battery to work on the truck. It took me two days to do the work, then I hooked it back up and now dead. I tried to jump start it, but it wasn't any good. I was using a 2002 Subaru WRX and it seemed like it just didn't have enough juice for the truck.
So, I went out and got a brand new battery, put it in the truck and what do ya know? That one's dead too, I'm not 100% sure it was charged to start with, but what's the deal? The truck ran fine before, so I don't think it'd kill a brand new battery. The battery is grounded to the block, I didn't see a chassis ground anywhere. If that's the problem, why didn't it do it before?
There could be a loose connection to the starting circuit, even at the posts. There could also be a drag on the engine....don't know about what you did specifically when you removed whatever parts. But a Battery has to have enough amperage to start a starter, low amp = slow drag.
It's a slow drag and the battery power was on the lowest light when tested. It's turn over a few times, then just do the "tick, tick, tick". The posts have a good connection, the switch itself could be the problem...
This may be a total load of stupidity, but in order to change the rear main seal would you not have to crack the engine from the tranny. If so, I have no experience with tearing down an I6 with a C5, is it possible that the tranny shaft wasn't seated all the way in when the engine and tranny were bolted back together. This could be checked by trying to turn the engine with a wrench. It would cause the engine to be extremely hard to turn over thus acting like a weak battery. Like I said, this may be way out in left field, but that's where I play ball and this exact thing happened to a "friend" of mine when I, no he, put his truck back together.
Well, I never pulled the converter off of the tranny. I unbolted it from the flywheel and pulled the tranny and convert off as one. Everything bolted back up fairly easily. What you're saying sounds like what's happening though. I'm taking it to a shop because I'm pressed for time to have it running and I need my truck back...