kyanox
20+ Year Contributor
- 52
- 0
- Feb 17, 2003
-
Missoula,
Montana
Ok I wanted to get a thread started, partially to catalog my experience with ordering a JDM on ebay (yes i know, i must be stupid) along with get some input on what might fix the problem.
First of all, I have a 92 TSI, when i aquired the car the guy who owned it before me had spent some $$ on the motor. This is what the guy said it came with. An EVO3 motor, 16g big turbo, 550cc injectors.
Well long story short, the motor wouldn't start and after digging into it, the kid had broken off 1 of the number 3 intake valves. Now the number 3 piston had a big chunk out of it, so i replaced them. The pistons in the motor before i replaced them were marked 63tf1, which i couldnt find for replacement, so i use 63tk1. Long story short, that motor ran for about 100 miles before the top end knocking came back. Upon further inspection, i noticed the valves were slapping the pistons, and whomever did the block before me had shaved too much off the block, the f1 and k1 pistons were topping off right above the top of the block, and smacking the valves when they were closed.
So lesson learned there, i plan on rebuilding that motor with a thicker cometic head gasket so the valves don't hit.
Any ideas on that build before i begin it.
Also next, the reason for the thread. I bought a JDM engine on ebay, the auction said 80k miles on it, and guaranteed head/block engine, it did ship with a full harness and switchable trans/transfer case
.
So i get the motor in, its guaranteed to run by the company who sold it. As long as i replace timing/gaskets/etc... all the usuals one replaces when a motor is out of the car. Long story short, when i went to fire it up tonight, it wouldnt idle, it would fire for a bit and die, and there was this LOUD knock sound comming from the engine. The last time i heard such a loud knock was from a broken rod.
Now im not a novice by any means, i've owned several eclipses and a few talons. So i started with a compression test. I got wierd values.. My first set were 25-0-50-75 which normally = dead motor. So i ran them again, this time cranking for 30 seconds each cylinder. 90-80-90-110, mm this started looking good. So i ran 4 more tests on each cylinder. 0-20-40-50, 25-50-90-110, 50-70-110-120, 125,145,145,145/
Here's where im confused. Now before anyone suggusts my tester could be faulty, i have 4 compression testers, just for that purpose..
What's happening is, compression is fluxuating when trying to fire i think. But im not sure what would cause that. I have noticed that there is a really loud knock, like rod knock. When i got the motor it was already drained, but the oil was black. There wasn't any metal shavings in it, and the filter also had no shavings.
I did remove the balance shafts, and used my rear stub for the oil pump, and left the front balance shaft in without a belt.
So at this point im going to pull the oil pan and check the rods/mains for clearance, unless anyone has any other ideas. I do have plastiguage, and i will probably plastiguage, but this loud knock really does sound like a spun bearing. Any ideas?
First of all, I have a 92 TSI, when i aquired the car the guy who owned it before me had spent some $$ on the motor. This is what the guy said it came with. An EVO3 motor, 16g big turbo, 550cc injectors.
Well long story short, the motor wouldn't start and after digging into it, the kid had broken off 1 of the number 3 intake valves. Now the number 3 piston had a big chunk out of it, so i replaced them. The pistons in the motor before i replaced them were marked 63tf1, which i couldnt find for replacement, so i use 63tk1. Long story short, that motor ran for about 100 miles before the top end knocking came back. Upon further inspection, i noticed the valves were slapping the pistons, and whomever did the block before me had shaved too much off the block, the f1 and k1 pistons were topping off right above the top of the block, and smacking the valves when they were closed.
So lesson learned there, i plan on rebuilding that motor with a thicker cometic head gasket so the valves don't hit.
Any ideas on that build before i begin it.
Also next, the reason for the thread. I bought a JDM engine on ebay, the auction said 80k miles on it, and guaranteed head/block engine, it did ship with a full harness and switchable trans/transfer case
.So i get the motor in, its guaranteed to run by the company who sold it. As long as i replace timing/gaskets/etc... all the usuals one replaces when a motor is out of the car. Long story short, when i went to fire it up tonight, it wouldnt idle, it would fire for a bit and die, and there was this LOUD knock sound comming from the engine. The last time i heard such a loud knock was from a broken rod.
Now im not a novice by any means, i've owned several eclipses and a few talons. So i started with a compression test. I got wierd values.. My first set were 25-0-50-75 which normally = dead motor. So i ran them again, this time cranking for 30 seconds each cylinder. 90-80-90-110, mm this started looking good. So i ran 4 more tests on each cylinder. 0-20-40-50, 25-50-90-110, 50-70-110-120, 125,145,145,145/
Here's where im confused. Now before anyone suggusts my tester could be faulty, i have 4 compression testers, just for that purpose..
What's happening is, compression is fluxuating when trying to fire i think. But im not sure what would cause that. I have noticed that there is a really loud knock, like rod knock. When i got the motor it was already drained, but the oil was black. There wasn't any metal shavings in it, and the filter also had no shavings.
I did remove the balance shafts, and used my rear stub for the oil pump, and left the front balance shaft in without a belt.
So at this point im going to pull the oil pan and check the rods/mains for clearance, unless anyone has any other ideas. I do have plastiguage, and i will probably plastiguage, but this loud knock really does sound like a spun bearing. Any ideas?
