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Old 09-28-2011, 10:06 AM   #21
nixtux
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Quote:
Originally Posted by guiguilandry View Post
http://www.aleromod.com/forums/showthread.php?t=19347
try to look there for the wiring diagram, you'll be able to compare both ecu pinout I think..

You may be a noob here but I don't think you are nood in the mechanic in general ?? You seem to know what you are doing

and for the hitting valve on the 3500 what is your headgasket thickness ? And what is the pushrod lenght ? is the cam too agressive for the valve spring/pushrod combo you got ?

I'm pretty sure the shop that installed the valve springs did something
wrong because it ran fine for the cam/springs break-in and drove smooth
for about 15 miles. Then it stopped (no apparent noise.) It just died. When trying to restart, it sounded like the timing chain broke (no compression.) However some of the cylinders did have compression.
Should be obvious when the heads are off.



Haven't gotten the heads pulled yet to find out the exact damage,
but I had a shop say it kind of looks like a valve guide seized. Only #2
is completely impacted. The remaining exhaust valves are only slightly
impacted.

Hopefully in November I can afford the parts to get a valve job done.
Check for clearance/troubleshoot the failure. Hopefully get it running
again this winter and put it back in in the spring.





Pushrods: 5.790" and 6.115
Fel-pro head gasket
Cam is pretty mild. .534 gross lift
Comp Cams 26986 springs.
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1999 Alero GLX 4dr Whi
3500 (stock ATM)/4t45e (3.29)
Had a cammed 3500 built but exhaust valves hit.
Cash is tight so time will tell why.


Last edited by nixtux : 09-28-2011 at 11:51 AM.
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Old 09-30-2011, 09:43 AM   #22
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Thanks for that site, it's been great. Beyond helpful for troubleshooting the wiring. It looks like the 2002 will go in and it looks like the wire numbers/end
points match for the 05. So going to find one at a junkyard and switch it out.

What will I need to do with HP to get it to bark again, if anything. Thanks!
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1999 Alero GLX 4dr Whi
3500 (stock ATM)/4t45e (3.29)
Had a cammed 3500 built but exhaust valves hit.
Cash is tight so time will tell why.

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Old 09-30-2011, 01:06 PM   #23
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Quote:
Originally Posted by nixtux View Post
Thanks for that site, it's been great. Beyond helpful for troubleshooting the wiring. It looks like the 2002 will go in and it looks like the wire numbers/end
points match for the 05. So going to find one at a junkyard and switch it out.

What will I need to do with HP to get it to bark again, if anything. Thanks!

Make sure the junkyard will take it back if it won't work in your car. Install it, do the relearn, and see if the car will start. Run it if you can to see if any and all incompatibilities show up. For instance, the alternator wiring is most likely different, "Charge" light may come on. If it seems ok otherwise, proceed with adjusting the PCM. It will have a different fuel injector IFR, possibly other differences. HP tuners will require you to licence the new PCM as well as your original.
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Old 10-07-2011, 12:33 PM   #24
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The junkyard said they will "trade" for a different one so good enough.

I got a 2002 and put it in but it wouldn't start. I was unable to download the binary for it as well. I don't know if it was a security issue or something else.

I also talked to a transmission guy and he sad they changed the valve
in 2003 so I'll go trade the 2002 for a 2003 in a few. If the computer
fails he thinks he can get the old valve into the current transmission.
But it's a $400-500 job so if I can avoid that...

Could you be a bit more specific on what I need to do to put it in? I'm
not sure if it's just incompatable or if it's a issue otherwise.
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1999 Alero GLX 4dr Whi
3500 (stock ATM)/4t45e (3.29)
Had a cammed 3500 built but exhaust valves hit.
Cash is tight so time will tell why.

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Old 10-07-2011, 07:07 PM   #25
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I'll test a 2003 Monday, if it works great if not the transmission guy at the GM dealership is looking into whether the old part will fit the transmission.

According to him, GM changed the transmission pressure valve in 2003 on the 4t4x. So if you put a transmission from 2003+ in a 2002 or older you may need to change that valve...

Not sure if anyone else has tried what I have or not, so I'm open to suggestions.
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1999 Alero GLX 4dr Whi
3500 (stock ATM)/4t45e (3.29)
Had a cammed 3500 built but exhaust valves hit.
Cash is tight so time will tell why.

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Old 10-07-2011, 07:51 PM   #26
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Oh and the wiring is the same so it's not a wiring issue. He checked that.
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1999 Alero GLX 4dr Whi
3500 (stock ATM)/4t45e (3.29)
Had a cammed 3500 built but exhaust valves hit.
Cash is tight so time will tell why.

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