Hello Afourians, Friday, Dec. 20, 2012 11:00 am PST
This is my first post attempt; despite years of enjoyment reading the forums.
After recent purchase of our 3rd Newport, a '77, we had numerous engine failures bringing it home to it's Long Beach, Ca. marina.
Thus far, we have replaced water cooling jacket plate & it's accessory parts; impellar in water pump, & changed bogging 3-blade back to 2-blade 12 x 6.
With the increased RPMs came steam from engine; which was shut down and water was coming from 3 & 4's spark plug wells.
Disassembly found 1/4" hole in head & gasket that had never seated properly. While awaiting our parts (head, drill/tap kit, studs/nuts, gaskets & sealers) from Moyer, we adjusted the valves (looked like never been done), solvent bathed carb, & made a Schroeder valve assembly to test the manifold (currently still holding air pressure while sun warms it) and head after installing both; the head we hoped to install today.
BIG SCARY FINDING ON BLOCK'S DECK: Forward (by flywheel) port side's 2nd stud threaded hole has some wierd chewed mat'l removed around it's otherwise flat surface til threaded hole starts. More importantly, a bubble-like (1/4"ish)raised area of head's top surface at threaded hole was observed. I haven't measured it's height yet; but with recommended max gap of .005 for head to block, it looks concerning.
Yes, we got the double-gasket set. Is the .005 max gap before gaskets installed, or after gaskets in and torqued to the (newer?) 25 lbs?
QUESTIONS:
Has anyone seen such bubble bump (without any gaps/separations observed); & how to address/repair such???? We were thinking of sanding/grinding it down; if Afourians/Don think there is enough material. What do any of you experienced folk think?
Thanks in advance for any helpful input!
This is my first post attempt; despite years of enjoyment reading the forums.
After recent purchase of our 3rd Newport, a '77, we had numerous engine failures bringing it home to it's Long Beach, Ca. marina.
Thus far, we have replaced water cooling jacket plate & it's accessory parts; impellar in water pump, & changed bogging 3-blade back to 2-blade 12 x 6.
With the increased RPMs came steam from engine; which was shut down and water was coming from 3 & 4's spark plug wells.
Disassembly found 1/4" hole in head & gasket that had never seated properly. While awaiting our parts (head, drill/tap kit, studs/nuts, gaskets & sealers) from Moyer, we adjusted the valves (looked like never been done), solvent bathed carb, & made a Schroeder valve assembly to test the manifold (currently still holding air pressure while sun warms it) and head after installing both; the head we hoped to install today.
BIG SCARY FINDING ON BLOCK'S DECK: Forward (by flywheel) port side's 2nd stud threaded hole has some wierd chewed mat'l removed around it's otherwise flat surface til threaded hole starts. More importantly, a bubble-like (1/4"ish)raised area of head's top surface at threaded hole was observed. I haven't measured it's height yet; but with recommended max gap of .005 for head to block, it looks concerning.
Yes, we got the double-gasket set. Is the .005 max gap before gaskets installed, or after gaskets in and torqued to the (newer?) 25 lbs?
QUESTIONS:
Has anyone seen such bubble bump (without any gaps/separations observed); & how to address/repair such???? We were thinking of sanding/grinding it down; if Afourians/Don think there is enough material. What do any of you experienced folk think?
Thanks in advance for any helpful input!
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