The engine is an olds 403.
Well i built this engine over the summer, bottom end was a shortbloock. I put new main studs in it and checked everything while i was in there, it all seemed tight and i didn't see any cause for concern. Broke the cam in just fine, and did allot of test driving to get the engine tuned in correctly, no problems. I didn't really run the car at all over the winter, this month was the first month it's been fired up, when i did fire it up after it idles for a few minutes i THOUGHT i heard what sounds like a bottom end knock, i had a few friends/ other mechanics look at it and they all said it's all in my head. The cars still open header so it makes it pretty hard to determine. The sound to me sounded like it was originating from the passenger side of the engine, so i got down under the car while it was idling and cupped my hand beside the header collector where it ends, and i couldn't hear the noise i "thought" i was hearing, anymore.
Am i crazy or is something going on here?
No noises when it revs up, nothing at all. this sound isn't consistent either, sometimes i think i can hear it and sometimes i cant. When i think i can hear it, if i walk to the other side of the car i cant tell if it's still there or not.
I'm going to plum in the rest of the exhaust tomorrow so it's not so loud, i'll know for sure then.
Here's the clincher, i've got to drive this car from PA to SC in three weeks, so i have to get to the bottom of this now. :blam:
I'm really stressing out over this, if this engine is ****ed then i'll probably lose my car. 4 years worth of work, down the tubes.
Well i built this engine over the summer, bottom end was a shortbloock. I put new main studs in it and checked everything while i was in there, it all seemed tight and i didn't see any cause for concern. Broke the cam in just fine, and did allot of test driving to get the engine tuned in correctly, no problems. I didn't really run the car at all over the winter, this month was the first month it's been fired up, when i did fire it up after it idles for a few minutes i THOUGHT i heard what sounds like a bottom end knock, i had a few friends/ other mechanics look at it and they all said it's all in my head. The cars still open header so it makes it pretty hard to determine. The sound to me sounded like it was originating from the passenger side of the engine, so i got down under the car while it was idling and cupped my hand beside the header collector where it ends, and i couldn't hear the noise i "thought" i was hearing, anymore.
Am i crazy or is something going on here?
No noises when it revs up, nothing at all. this sound isn't consistent either, sometimes i think i can hear it and sometimes i cant. When i think i can hear it, if i walk to the other side of the car i cant tell if it's still there or not.
I'm going to plum in the rest of the exhaust tomorrow so it's not so loud, i'll know for sure then.
Here's the clincher, i've got to drive this car from PA to SC in three weeks, so i have to get to the bottom of this now. :blam:
I'm really stressing out over this, if this engine is ****ed then i'll probably lose my car. 4 years worth of work, down the tubes.