Pulled her, have a project to work on….

Comments

• aero3113 Member Posts: 9,602 ✭✭✭✭✭

  October 2025 edited October 2025

  I chased all of the head bolts this morning and installed the heads. Got front and rear brackets back on as well? Anyone know what this sensor is for at the back of both heads? Is it for cylinder head temperature?
  
  
  

  
  

  
  

  
  

  2008 330EC

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• aero3113 Member Posts: 9,602 ✭✭✭✭✭

  October 2025

  
  

  2008 330EC

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• Formulaben Confirm Email, Member Posts: 192 ✭✭

  October 2025

  Knock sensor.
  
  https://www.mercruiserparts.com/bam/subassemblydetail/43949019/28193894

  2006 Fiesta Vee 270
  

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• aero3113 Member Posts: 9,602 ✭✭✭✭✭

  October 2025

  WoW, never knew that's where they're located!

  2008 330EC

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• LaRea Member, Moderator Posts: 7,951 mod

  October 2025

  @aero3113 - looks pretty.  This is some really nice eye-candy.
  

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• aero3113 Member Posts: 9,602 ✭✭✭✭✭

  October 2025

  👍🏻👍🏻⚓️

  2008 330EC

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• Formulaben Confirm Email, Member Posts: 192 ✭✭

  October 2025

  aero3113 said:

  WoW, never knew that's where they're located!

  Coming from an Indmar it's funny how so much of it is exactly the same, yet certain parts are totally different, such as the knock sensor and IAC valve, but the biggest for me was the sea water pump. I'm sure there's a good reason for it, but I'm clueless.
  
  Years ago someone said something about staying away from the wake boats with Mercruiser engines...I asked why and he said "if nothing else, the impeller changes." 
  
  I almost forgot that comment until looking for a Rinker, then after seeing how hard that was the first thing on the upgrade list was to swap it out to a crank driven pump.  I reckon the swap was probably easier than a single impeller change, and now it takes just a few minutes and no busted knuckles.  The only downside I see is if you throw a belt you need to momentarily remove a hose to reinstall a new one, except that you can zip-tie a new belt looped inside and onto the hose and if the old one shred, then just remove it and put on the new belt without removing any hoses.  I know some don't have the space to do the conversion, but I'm sure glad I did.

  2006 Fiesta Vee 270
  

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• captkevin Member Posts: 460 ✭✭✭

  October 2025

  Just curious why did you clean up the threads for the head bolts? Just good practice? what do the heads get torqued to? Looks like a brand new motor. If you ever upgrade & sell your boat someone will be getting the best taken care of boat in history. the quality of your work is amazing.

  2004 232

  2021 Yamaha Fx svho
  

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• aero3113 Member Posts: 9,602 ✭✭✭✭✭

  October 2025

  Thank you @captkevin !
  The reason for cleaning the threads is to prevent any debris from dragging on the bolt and giving a false torque reading.
  I torqued the bolts in three stages and in a certain order. There’s another method to use a torque angle but I felt this method was fine. I even bought the tool to torque to a degree but heard stories of people breaking bolts. But I also read that method is for torque to yield bolts. The new head bolts I bought are not TTY bolts.
  
  
  

  
  

  
  

  2008 330EC

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• Ian Member Posts: 2,998 ✭✭✭✭

  October 2025

  This is what happens when an aircraft mechanic does this versus a regular mechanic…

  Regards,

  Ian

  The Third “B”

  Ravena Coeymans Yacht Club

  https://www.rcyachtclub.com/

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• aero3113 Member Posts: 9,602 ✭✭✭✭✭

  October 2025

  😂

  2008 330EC

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• PickleRick Member Posts: 4,243 ✭✭✭✭✭

  October 2025

  TTY botls were invented by the devil.  
  
  
  

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• aero3113 Member Posts: 9,602 ✭✭✭✭✭

  October 2025 edited October 2025

  @PickleRick I understand when they say TTY will give a more accurate torque but it’s not necessary!! 

  2008 330EC

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• PickleRick Member Posts: 4,243 ✭✭✭✭✭

  October 2025 edited October 2025

  I much prefer someone like ARP head studs where you don't need that final, say torque to 80 ft-lbs and then an extra 80 degree turn.   
  
  The boat has plenty of working room but many modern V8 engines don't have a ton of space under the hood to make that a simple process.  
  
  I also appreciate reusable bolts.   Whenever possible I always switch over to arp studs or reusable hardware. 
  
  
  

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• aero3113 Member Posts: 9,602 ✭✭✭✭✭

  October 2025 edited October 2025

  I ordered 8 new intake bolts. I cut the heads off of 4 of the old ones. I’m going to use these as guides for when the intake goes on. The intake is extremely heavy and you really only have one shot to line everything up and not ruin the sealant and gaskets. You don’t want to have to slide the intake around to get it aligned. This will line it up perfectly on the first shot. I painted the distributor hold down and bolt also.
  
  

  2008 330EC

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• aero3113 Member Posts: 9,602 ✭✭✭✭✭

  October 2025

  
  

  2008 330EC

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• aero3113 Member Posts: 9,602 ✭✭✭✭✭

  October 2025

  
  

  I’ll probably install the intake next week. Below are the torque specs and sequence to follow.
  
  

  
  

  
  

  2008 330EC

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• PickleRick Member Posts: 4,243 ✭✭✭✭✭

  October 2025

  That intake is lacking a nice center handle to lay it down completely level without risking a pinched finger 
  
  
  
  
  

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• aero3113 Member Posts: 9,602 ✭✭✭✭✭

  October 2025

  Actually, that's why I left the thermostat housing on. It gives a nice hand hold up front and will make it much easier.

  2008 330EC

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• PickleRick Member Posts: 4,243 ✭✭✭✭✭

  October 2025

  What's the fun in that?
  
  Did the machine shop give any indication as to what might have caused the valve failure (s)? 
  
  

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• aero3113 Member Posts: 9,602 ✭✭✭✭✭

  October 2025

  He thinks an over heat. I did overheat once this summer and it might have put them over the edge. But it ran fine after it so I’m thinking it may have weakened the valves and got worse towards the end of the season.

  2008 330EC

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• captkevin Member Posts: 460 ✭✭✭

  October 2025

  Would think it would take more than 1 overheat to cause that extent of damage.
  

  2004 232

  2021 Yamaha Fx svho
  

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• aero3113 Member Posts: 9,602 ✭✭✭✭✭

  October 2025 edited October 2025

  @captkevin , I have had 1 or 2 other overheats on this engine in the past years.

  2008 330EC

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• captkevin Member Posts: 460 ✭✭✭

  October 2025

  What was causing the overheats?

  2004 232

  2021 Yamaha Fx svho
  

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• aero3113 Member Posts: 9,602 ✭✭✭✭✭

  October 2025

  Sucked up mud at low tide 

  2008 330EC

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• aero3113 Member Posts: 9,602 ✭✭✭✭✭

  October 2025

  Receive the new intake bolts and painted them.
  
  

  
  

  
  

  2008 330EC

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• aero3113 Member Posts: 9,602 ✭✭✭✭✭

  October 2025

  Trying to get myself motivated and finish this project! Hopefully get most of it back together today.

  2008 330EC

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• aero3113 Member Posts: 9,602 ✭✭✭✭✭

  October 2025 edited October 2025

  I got everything back together and adjusted the valves. Just have to install the manifolds, risers/elbows. Using the studs to align the intake manifold was huge. No way would you get it lined up first shot. I was surprised to see that the distributor was made of mostly plastic.
  
  
  
  

  
  

  
  

  
  

  
  

  2008 330EC

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• aero3113 Member Posts: 9,602 ✭✭✭✭✭

  October 2025

  When I was setting top dead center on the number 1 cylinder, there was compression with my finger over the spark plug hole. Before I removed the heads, there was absolutely 0 compression with my finger over the number 1 spark plug hole 👍🏻.

  2008 330EC

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• mbnarney Member Posts: 185 ✭✭✭

  October 2025

  I have to compliment you on how clean you work. Doesn't look like there was enough cussing and tool throwing going on there.

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