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Originally Posted by RJBBC
(Post 2662262)
The motor is out of the boat and partially disassembled. Cylinders and heads look good. The low compression in some cylinders is from valves failing to fully seat, but why? Included here are pictures of the shortblock, heads and the intake valve from cylinder 8. What do you think?
FYI. Eickert is now located in Easton, Il. My dad has already seen the dyno room. I asked him to inquire whether or not they are willing to take on smaller side jobs such as your boat and Pratt's boat or if their focus is solely on Onken Racing endeavors. |
Originally Posted by Knot 4 Me
(Post 2662810)
Why? That would be a good question for the person that did the head work and remapped the ECM. You should have gotten a lot more hours out of that upgrade. I still wonder if you were leaned out until the fuel pump that should have been on from day one was added.
FYI. Eickert is now located in Easton, Il. My dad has already seen the dyno room. I asked him to inquire whether or not they are willing to take on smaller side jobs such as your boat and Pratt's boat or if their focus is solely on Onken Racing endeavors. |
Originally Posted by RJBBC
(Post 2664063)
Do you have a phone number for Eickert?
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Originally Posted by RJBBC
(Post 2653364)
Thanks KAAMA. I have already sent 10x a message.
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Originally Posted by Chris Sunkin
(Post 2662283)
Could be too tight of stem clearance. have you changed anything on your cooling system? Lost an impeller or had a cooling issue? Heat makes exhaust valve stems expand. More heat- more expansion. Too much and they can gall and sometimes stick. Also, bad fuel or a lean condition in the fuel system can cause excess heat- leading to seat erosion and valve tulip-ing. Check to see if they're all the same length.
You and Vinny were correct in thinking seat erosion or valve seating may be an issue. The machine shop inspecting the heads mentioned the valve seats last grind job were less than optimal. I am almost wondering if the grind job was performed by a young apprentice, but speculation is dangerous. I am happy to have a $150 valve job fix the problem. Now back to finding a new motor. |
Rob,
Well.... The good news is you can repair the heads, re-assemble that 454 and sell it off as a working engine. Good luck with the new engine. If you ever want to talk about combinations, drop me a line. My 540 may not be the best one out there, but its a damn good one. |
Originally Posted by Vinny P
(Post 2667687)
Rob,
Well.... The good news is you can repair the heads, re-assemble that 454 and sell it off as a working engine. Good luck with the new engine. If you ever want to talk about combinations, drop me a line. My 540 may not be the best one out there, but its a damn good one. I will give you a call. Thanks, Rob |
Any thoughts or experience with a TCM 620?
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Too narrow a valve seat face on the exhaust will definitely lead to premature failure. When you get them back, run them with a dab of surface blue and look at the contact points to confirm they have enough surface.
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Onken Racing/Keith Eickert Pics
3 Attachment(s)
Here are a few pictures taken yesterday at Onken Racing/Eickert Engines. I want to thank Jeff Sheary for setting the field trip up and Donnie Onken and Keith Eickert for showing us around and sharing some of their current projects.
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