What did I do to my motor? :(
11-01-2007, 07:22 PM
#41
Drifting
Member Since: Jun 2006
Location: Clanton AL
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Hey Joe, never boosted my vette, but when I had my VR4, sometimes the y-pipe would blow off under hard boost, making a loud POP and then the car would die. check all the airway connections and make sure you haven't blown off a clamp or something like that.
11-01-2007, 07:52 PM
#42
Le Mans Master
Even if the hose came loose, it should start and run with it loose...Got to be something else...Even a cracked intake should at least attempt to turn over and fire...
11-01-2007, 07:59 PM
#43
Race Director
Thread Starter
Looks like its the timing chain. We popped off the oil cap and I think you can see a rocker and a spring and there is no movement when the motor is cranked. Also my dad (old school mechanic LOL) says the backfire which is coming through the manifold is a result of timing, or lack thereof.
Suprised there are no other codes popping up. And I haven't ruled out the manifold, have a bud coming tomorrow to help me pull it.
Suprised there are no other codes popping up. And I haven't ruled out the manifold, have a bud coming tomorrow to help me pull it.
11-01-2007, 08:30 PM
#44
Team Owner
Member Since: Jul 2004
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St. Jude Donor '05-'08
At WGI my timing chain blew. All I heard was pop and then there was nothing. I tried to start the car a few times with no luck but it seemed like it wanted to start except for the occasional backfire. Only code I got was cam sensor out of position. There was no other obvious damage like oil leaking.
sucks big time. I had a 402 already built knowing my racing engine would eventually die. I thought it would be a rod or something else but chit happens (and i had a double roller).
sucks big time. I had a 402 already built knowing my racing engine would eventually die. I thought it would be a rod or something else but chit happens (and i had a double roller).
Last edited by Wicked Weasel; 11-02-2007 at 09:00 AM.
11-02-2007, 03:37 PM
#47
Melting Slicks
That sucks, but it was my first guess. A lot of times a catastrophic mechanical failure will not set a code because there are not sensors tied to the part that failed. For example, Timing Chain, Rod, Crankshaft, Block cracking, Etc... Good luck with the repairs and hopefully it didn't wipe out all the valves and scar the Piston tops.
11-02-2007, 04:41 PM
#48
Race Director
Looks like its the timing chain. We popped off the oil cap and I think you can see a rocker and a spring and there is no movement when the motor is cranked. Also my dad (old school mechanic LOL) says the backfire which is coming through the manifold is a result of timing, or lack thereof.
Suprised there are no other codes popping up. And I haven't ruled out the manifold, have a bud coming tomorrow to help me pull it.
Suprised there are no other codes popping up. And I haven't ruled out the manifold, have a bud coming tomorrow to help me pull it.
As Bill Curlee stated, start with the basics...Spark, fuel and compression. All of these can be easily accomplished with minimal tools and time.
At least that's my thoughts.
11-02-2007, 07:30 PM
#50
Race Director
Thread Starter
We have spark and fuel (at least in the rail), still need to check compression, the T/B is working as well. Dang I was ready to take her out this weekend too
Last edited by vetterlatethannever; 11-02-2007 at 07:32 PM.
11-02-2007, 07:44 PM
#51
Melting Slicks
That sucks, but it was my first guess. A lot of times a catastrophic mechanical failure will not set a code because there are not sensors tied to the part that failed. For example, Timing Chain, Rod, Crankshaft, Block cracking, Etc... Good luck with the repairs and hopefully it didn't wipe out all the valves and scar the Piston tops.
You learn something new every day. Time for me to pull out the manual and do my homework.
11-02-2007, 09:08 PM
#53
Melting Slicks
Member Since: Jan 2007
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i haven't been on much lately and just saw this thread. Sorry to hear this, Hope i don't run into the same issues when I finally get mine on. I didn't read the entire thread, so forgive me if the problem has been found. Any chance a part of the intake piping blew off? My turbo 3000gt used to do that frequently when the boost was turned up. The piping was fine for stock pressure, but when turned up a bit, It would blow the y pipe off the throttle body.
Good luck, doesn't sound too serious.
Good luck, doesn't sound too serious.
11-02-2007, 10:05 PM
#54
Melting Slicks
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oops, guess I was a bit late.
11-02-2007, 10:39 PM
#55
Instructor
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If timing chain broke the noise would be like a bunch of bolts floating around in the motor because valves would be hitting pistons.
Been the done that
Been the done that
11-03-2007, 12:33 AM
#56
Race Director
Thread Starter
) is still appreciated 
11-03-2007, 12:45 AM
#57
Race Director
Thread Starter
Thanks Any chance of not having other damage (pistons, valves) with a small cam and stock (unmilled, maybe more clearance) heads? Or should I expect the worst? Already planning for it.........
11-03-2007, 07:54 AM
#58
Instructor
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I Do no think it popped the chain. Easy way to find out pull a valve cover turn the motor over. I think you are going to find something a little less severe.
11-03-2007, 10:14 AM
#60
Melting Slicks
Man, I don't have the words to express how bad I feel for you. 
I hope you find the problem quickly and and fix is easy and cheap. Hang in there, I went through my own phantom problems last Fall; I know how frustrating it is.
I hope you find the problem quickly and and fix is easy and cheap. Hang in there, I went through my own phantom problems last Fall; I know how frustrating it is.
