talonsnwbrdr
10+ Year Contributor
- 71
- 0
- Sep 26, 2010
-
New Britain,
Connecticut
Where do I start? I don't often post in the forums with questions to bug you guys with, but I'm really stumped on this one...
Late fall or early winter last year, I was on my way to pick from a parts car. Once I got home I noticed a real annoying ticking sound coming from the engine bay. Sounded like bad lifters but a little worse. So I got it checked out, and sure enough... slightly bent valves (two of them). Turns out that when I got my engine rebuilt the builder just threw in a couple 1g lifters aside from the 3gs I had sent them. They broke/collapsed and led to the bent valves. (Or that was our assumption at least)
So i got the head rebuild, oil port mods #1 and #2 done, cleaned everything out about 5 times and threw it back on the car with some new lifters. Still ticking like a mo-fo. Took the car on a short drive to try and pump them up, but no luck. So i checked pressures at the oil galley port (small one behind the thermostat) and at the stock turbo feed location, while keeping an eye on pressure coming from the OFH (running an evo 3 16g off the stock feed, and Kiggly HLA regulator). Idling at operating temp, I was seeing about 20psi from the OFH, about 30psi from the turbo feed, and only 7/8Psi from the head oil galley! (cold start showed 60psi OFH, 35psi turbo feed, 15psi solid at oil galley as expected with the Kiggly). Im running 10-30w oil, with a little lucas, as I have most of this cars life (before head rebuild was running Rotella for a little). The only thing I changed, that I can think of, around the same time was switching the turbo feed from the OFH to the stock location when my buddy, who has been around these cars longer than me, recommended I do so.
What could be causing this? Please someone chime in. There might be something I missed or forgot to mention so feel free to ask questions...
Also, is it possible that going back to the stock feed location and opening up that channel (getting rid of that block-off so to say), I reduced the flow, pressure, or volume going to the rest of the head? However unlikely that may be...
I don't know, I'm stumped and frustrated. Again please someone help...
Thank you
Late fall or early winter last year, I was on my way to pick from a parts car. Once I got home I noticed a real annoying ticking sound coming from the engine bay. Sounded like bad lifters but a little worse. So I got it checked out, and sure enough... slightly bent valves (two of them). Turns out that when I got my engine rebuilt the builder just threw in a couple 1g lifters aside from the 3gs I had sent them. They broke/collapsed and led to the bent valves. (Or that was our assumption at least)
So i got the head rebuild, oil port mods #1 and #2 done, cleaned everything out about 5 times and threw it back on the car with some new lifters. Still ticking like a mo-fo. Took the car on a short drive to try and pump them up, but no luck. So i checked pressures at the oil galley port (small one behind the thermostat) and at the stock turbo feed location, while keeping an eye on pressure coming from the OFH (running an evo 3 16g off the stock feed, and Kiggly HLA regulator). Idling at operating temp, I was seeing about 20psi from the OFH, about 30psi from the turbo feed, and only 7/8Psi from the head oil galley! (cold start showed 60psi OFH, 35psi turbo feed, 15psi solid at oil galley as expected with the Kiggly). Im running 10-30w oil, with a little lucas, as I have most of this cars life (before head rebuild was running Rotella for a little). The only thing I changed, that I can think of, around the same time was switching the turbo feed from the OFH to the stock location when my buddy, who has been around these cars longer than me, recommended I do so.
What could be causing this? Please someone chime in. There might be something I missed or forgot to mention so feel free to ask questions...
Also, is it possible that going back to the stock feed location and opening up that channel (getting rid of that block-off so to say), I reduced the flow, pressure, or volume going to the rest of the head? However unlikely that may be...
I don't know, I'm stumped and frustrated. Again please someone help...
Thank you