Cylinder #5 sucked water due to crap header. What next?
#11
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Seen several bent connecting rods from water filled combustion chambers.
Tread lightly.
Tread lightly.
#13
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Thread Starter
Is it normal to have a slow spot when cranking or does that indicate something binding?
This is the motor, fwiw.
http://eagleenginesales.com/new-5025...gh-performance
This is the motor, fwiw.
http://eagleenginesales.com/new-5025...gh-performance
#14
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Is it normal to have a slow spot when cranking or does that indicate something binding?
This is the motor, fwiw.
http://eagleenginesales.com/new-5025...gh-performance
This is the motor, fwiw.
http://eagleenginesales.com/new-5025...gh-performance
Was this engine straight from GM, or has it been touched by anyone?
#15
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Thread Starter
Aftermarket.
http://eagleenginesales.com/new-5025...gh-performance
It was still holding 70+ psi oil pressure on the last run.
http://eagleenginesales.com/new-5025...gh-performance
It was still holding 70+ psi oil pressure on the last run.
#16
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Aftermarket.
It was still holding 70+ psi oil pressure on the last run.
http://eagleenginesales.com/new-5025...gh-performance
It was still holding 70+ psi oil pressure on the last run.
http://eagleenginesales.com/new-5025...gh-performance
#17
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Thread Starter
Bought it out of the swap shop with a reported 50 hours of run time, Can't say if it's been molested or not. I also had the heads off myself as I was going to get them flow tested for Rob to size a cam, but my flow tester took a month and still didn't get it done (that's a whole different story), so I bolted them back on for what little season I had left. I did not have them milled as I planned to pull them again this winter. Fel-Pro marine gaskets from Summit.
Last edited by Baja Rooster; 09-15-2015 at 10:28 PM.
#18
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While you certainly have a header issue to focus on, and thats #1. I personally though, would never allow my engines, or buddy's engines, to vary as much as 20-25+PSI of cranking pressure from bank to bank. Its one thing if you have a slight loss of compression psi from cyl to cyl due to valve leakage or what not, but normally, when it's off that much bank to bank, I bet you'll find someone had their dirty little hands in there.
Get a machinist straight edge, and lay it across the valve stems. My guess, is you probably won't find equal length across them.
#19
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Thread Starter
I had the highest recommended guy for this area who specializes in nothing but cylinder heads (why he was so busy), and he said they definitely needed work. The valve seats alone were .009 out of round. He was going to blueprint them. My concern now is if I have a bent rod or not.
Every primary tube of the header was completely full. I'm sure every cylinder on that side had water in it.
Every primary tube of the header was completely full. I'm sure every cylinder on that side had water in it.
Last edited by Baja Rooster; 09-15-2015 at 10:42 PM.
#20
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Sorry for getting off topic, which really has nothing to do with your leaking header issue. Its just things I notice when trying to look at the whole picture sometimes.