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How to check if engine is healthy or about to break.

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Old Nov 1, 2007 | 09:39 AM
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Exclamation How to check if engine is healthy or about to break.
I bought a second Z28 ( a 2002 with 31,000 miles ). The tranny started to act up after about 3000 miles. I sent it to sixspeedsinc and had it looked at. Long story short, it is suspected that the previous owner/owners abused the living **** out of the car. The tranny was so messed up that the person from sixspeed said they where amazed since the engine is making stock power, and the car has 31K miles ( there were parts melted to the counter shaft ).

Since the tranny was a ticking time bomb of abuse, I would like to do a full checkup on the engine to see if its about to go. All I can think of is haveing a full compresion check done. Any ideas?
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Old Nov 1, 2007 | 09:48 AM
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Compression and leakdown test, full OBDII scan then dyno tune.
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Old Nov 1, 2007 | 10:47 AM
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Leakdown test will tell you the condition of the bottom end as well as the condition of the valves and valveseats.
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Old Nov 1, 2007 | 10:52 AM
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Originally Posted by brad8266
Leakdown test will tell you the condition of the bottom end as well as the condition of the valves and valveseats.
Leak down test will tell if you have "blow by" the piston rings.And if the valves are seating correctly.I.E. burnt valve, cracked ring etc...

Either way, a comp check and L/D is a good start.
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Old Nov 1, 2007 | 11:42 AM
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Originally Posted by 87gnx
Leak down test will tell if you have "blow by" the piston rings.And if the valves are seating correctly.I.E. burnt valve, cracked ring etc...

Either way, a comp check and L/D is a good start.
um ok, thanks for saying pretty much the samer thing I did.
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Old Nov 1, 2007 | 02:03 PM
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Would a Chevy dealer be a good place to have these tests done, or should I bring it to a speed shop?
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Old Nov 1, 2007 | 02:17 PM
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Originally Posted by ZeroFear
Would a Chevy dealer be a good place to have these tests done, or should I bring it to a speed shop?
You can do it yourself, its really easy.
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Old Nov 1, 2007 | 02:39 PM
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Originally Posted by brad8266
um ok, thanks for saying pretty much the samer thing I did.
No,I didn't please tell me how a L/D test can check the bottom end like you said, bearings etc....

Don't **** in my ear and tell me its raining!!!
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Old Nov 1, 2007 | 03:29 PM
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The best way is to spray a wet 250 shot of NOS. IF it holds it then its a pretty good motor.
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Old Nov 1, 2007 | 07:16 PM
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Originally Posted by 87gnx
No,I didn't please tell me how a L/D test can check the bottom end like you said, bearings etc....

Don't **** in my ear and tell me its raining!!!
The only way to check bearings is to rip apart the motor, which i am sure the OP does not want to do, so my logical assumption was that he wants to see if the motor is ok in terms of compression and power. I didnt say bearings anyway, i said bottom end, which includes pistons/rings.

Relax there killer.
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Old Nov 1, 2007 | 07:17 PM
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Originally Posted by regorih383
The best way is to spray a wet 250 shot of NOS. IF it holds it then its a pretty good motor.

LOL @ that.
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