I just had the worst thing happen :(
08-20-2008, 01:26 AM
#1
I just had the worst thing happen :( I just recently saved my *** off for a year to come up with the money to put a new trans in my car and finally got it in Saturday... well, I just went out to move my car and when I did, I started it up and after idling for a couple of minutes, it developed a serious rod knock. I feel sick to my stomach... There is NO way I can afford to even buy a used shortblock right now. I am simply broke. I don't know what to do. I'm not trying to get sympathy here... I just need to vent. This seriously sucks. 
08-20-2008, 03:17 AM
#5
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i know how you feel man. Saved my *** off for my heads and cam. less than a 1000 miles after getting installed, ROD KNOCK.
took me about 6 months but I got running again
took me about 6 months but I got running again
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08-20-2008, 06:52 AM
#8
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Put it back up on jackstands and double check that the torque converter is tight. Sucks about that bad luck, I know exactly how you feel.
And yes most of it b/c these cars are driven hard and a ton of them are up around the 100K mark now also.
And yes most of it b/c these cars are driven hard and a ton of them are up around the 100K mark now also.
08-20-2008, 09:16 AM
#11
Double check those verter bolts, I've seen that happen before when the bolts are loose!
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Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
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Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
08-20-2008, 11:21 AM
#15
Here's another thing I noticed - it has 40PSI of oil pressure at idle warm. If it had a spun bearing, wouldn't the oil pressure be far lower? It's no different than before the knock. The reason I know it's not the clutch/flywheel is because as soon as it started happening, I could smell fuel pretty strongly and the engine would barely run - the SES light came on and I had to hit the gas a couple times to keep it running. Right now, I'm thinking it could possibly be a broken rocker arm/pushrod/lifter on an exhaust valve, which would force exhaust back into the intake and cause all sorts of issues. I'm going to pull the oil filter and drain it when I get home to check for debris and if it's still clean, I'll pull the valve covers and inspect there. I really hope it's something as simple as a bad rocker arm. It only ran for like 4 minutes when this occurred and an hour prior to it happening, I had ran it up to redline a few times with no issues at all.
08-20-2008, 11:29 AM
#16
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well if you want to know if it's a bottom-end rotating assy noise, or valvetrain noise, listen for the following:
Valvetrain speed is HALF the bottom-end speed.
Assume 700 RPM idle (adjust as needed)
700 RPM/60 = ~12 Revs/sec bottom end;
700 /60/2 = ~6 revs/sec valvetrain
Listen to how many knocks you hear per second, this should help you determine what's going on.
Valvetrain speed is HALF the bottom-end speed.
Assume 700 RPM idle (adjust as needed)
700 RPM/60 = ~12 Revs/sec bottom end;
700 /60/2 = ~6 revs/sec valvetrain
Listen to how many knocks you hear per second, this should help you determine what's going on.
08-20-2008, 01:02 PM
#17
Here's another thing I noticed - it has 40PSI of oil pressure at idle warm. If it had a spun bearing, wouldn't the oil pressure be far lower? It's no different than before the knock. The reason I know it's not the clutch/flywheel is because as soon as it started happening, I could smell fuel pretty strongly and the engine would barely run - the SES light came on and I had to hit the gas a couple times to keep it running. Right now, I'm thinking it could possibly be a broken rocker arm/pushrod/lifter on an exhaust valve, which would force exhaust back into the intake and cause all sorts of issues. I'm going to pull the oil filter and drain it when I get home to check for debris and if it's still clean, I'll pull the valve covers and inspect there. I really hope it's something as simple as a bad rocker arm. It only ran for like 4 minutes when this occurred and an hour prior to it happening, I had ran it up to redline a few times with no issues at all.
