Troubleshooting help needed- /6 engine rebuild won't turn, DAMMIT!!!!! Found the problem |
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Troubleshooting help needed- /6 engine rebuild won't turn, DAMMIT!!!!! Found the problem |
tornik550 |
May 2 2015, 07:54 PM
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#1
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Senior Member Group: Members Posts: 1,248 Joined: 29-January 07 From: Ohio Member No.: 7,486 Region Association: None |
Argh- I rebuilt a 2.7l this winter. Everything went very well with no obvious problems. I installed my engine, hooked up all the hoses, filled with oil and hooked up the starter. I had problems with the starter wiring however I finally got them resolved. I was getting 12.6v at the starter. I cranked the starter and the engine turned a couple of times then stopped. When I would crank the starter again, it would just sound like a starter with too low of voltage- the solenoid would shoot out but the starter wouldn't turn. I checked voltage and it was 12.5v. If I look at the fan blade when I crank the starter, I do not see it move even slightly.
What are my options of what could be wrong? I see it as a starter problem or the engine is somehow seized. I do not have the axels hooked up so I cannot see if the engine turns by pushing the car in gear. I have a small window cut in the firewall so I wiggled a 19mm box wrench onto the timing pulley nut. I tried to see if I could turn the engine even slightly and I could not. I couldn't put much force into it however I would have thought it would have moved to some extent. I think I will remove the starter and see if it cranks off of the car. If it functions properly, how can I check to see if the engine is seized without installing the axles. Is there anything common that could cause this issue? I would really prefer not to remove the engine. I am getting somewhat sick of working on it. Any ideas? |
tornik550 |
May 3 2015, 09:04 PM
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#2
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Senior Member Group: Members Posts: 1,248 Joined: 29-January 07 From: Ohio Member No.: 7,486 Region Association: None |
ARGH- I found my problem. 13mm nut in cylinder 5.
I had previously checked each cylinder with a borescope however this time I saw a slight glimmer. I was able to twist the borescope and see a nut close to the exhaust valve on cylinder 5. I do not know how the nut got in there. My kids were playing around my engine one day. It may have occurred then or at some other unknown time. I haven't been able to fish it out yet however I think I can get it out. I can clearly see the Pistons head which looks ok except a slight indent in the valve pocket. I can see the cylinder bore which also looks good. I cannot see the valves or combustion chamber. I assume there is a big indent in the compression chamber cause I can see that there is damage to the nut. I do not know the condition of the valve. What would you do? Get the nut out, bolt up the transmission, compression test and if the number are ok then run it? (I plan on re-rebuilding the engine next winter) Or Tear the engine down and assess the damage. |
boxsterfan |
May 3 2015, 09:41 PM
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#3
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914's are kewl Group: Members Posts: 1,776 Joined: 6-June 03 From: San Ramon, CA Member No.: 791 Region Association: Northern California |
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