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Old 26-07-2011, 16:18   #16
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Re: Engine Diagnoses

$200? That seems rather spendy for a head gasket. Oh, sorry I forgot it was a boat, never mind.
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Old 26-07-2011, 18:03   #17
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Re: Engine Diagnoses

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Originally Posted by Jim Cate View Post
Might check to see if one valve adjuster was screwed way down... valve never closes, hits piston as it nears TDC no matter which way you rotate the crank. Much easier for the dirty bastard to fix after he buys the disabled boat.

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Yes...but again it happens 180* out...meaning if it clunked at TDC, it is also clunking at BDC. Puzzling hugh?
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Old 26-07-2011, 18:06   #18
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Re: Engine Diagnoses

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It would have to be at least two valves screwed down in two cylinders to make it stop after 180 deg. rotation. For someone to take the valve cover off and screw down two valves would take quite a bit of time and effort.

Camshaft is 1:2 rotation with the crank so doubtful it has anything to do with the cam.

Can't really say why but I have a hunch its in the transmission.

See if you can locate the area where the clunk is coming from. A stethoscope would help you with that.
You seem to have a good handle on the approach. Unless I see something this weekend with mirrors and a seeing-eye dog, I will yank the engine and detail the engine area and diagnose the engine itself...What ever I find, I will post pictures. Maybe Senior Mechanico will chime in...
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Old 26-07-2011, 18:07   #19
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Re: Engine Diagnoses

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$200? That seems rather spendy for a head gasket. Oh, sorry I forgot it was a boat, never mind.
...he he he...the complete gasket kit for the engine is $1200..
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Old 26-07-2011, 18:16   #20
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Re: Engine Diagnoses

Please keep us updated, as this has me perplexed and interested.

Thanks,

Paul
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Old 26-07-2011, 18:18   #21
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Re: Engine Diagnoses

Is that $1200. gasket kit price from Westerbeke? If so there are plenty of Mitsubishi dealers and parts distributors around. I hope you will be able to find a better price than that. Of course its been a loooong time since I bought a gasket set so maybe that's the price...
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Old 26-07-2011, 19:07   #22
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Re: Engine Diagnoses

did he pour hydraulic fluid in multiple cylinders?
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Old 26-07-2011, 19:14   #23
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Re: Engine Diagnoses

Now there is a thought.
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Old 26-07-2011, 20:14   #24
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Re: Engine Diagnoses

180 either direction and clunk? If I wanted to sabotage an engine. I might just drop a bolt down the air intake. Piston coming up to TDC is blocked by the bolt.

Brad
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Old 26-07-2011, 20:30   #25
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Re: Engine Diagnoses

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Originally Posted by Celestialsailor View Post
...he he he...the complete gasket kit for the engine is $1200..
Geez louise! Interestingly, the cheapest marine engine I ever bought parts for was my 85 hp Mercedes! A new freshwater pump was $27 from the Dealer, Complete gasket set was something like $150 (1998 prices) It's basically a 240D engine, I guess Mercedes felt it was in their best interest to keep those taxi cabs running for 1,000,000 miles for the publicity!
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Old 26-07-2011, 20:48   #26
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Re: Engine Diagnoses

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Originally Posted by DeepFrz View Post
Is that $1200. gasket kit price from Westerbeke? If so there are plenty of Mitsubishi dealers and parts distributors around....
I was thinking the saaaaame thing
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Old 26-07-2011, 20:49   #27
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Re: Engine Diagnoses

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did he pour hydraulic fluid in multiple cylinders?
hmmm...interesting. in 2 cylinders. That would explain 180*...maybe
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Old 26-07-2011, 20:51   #28
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Re: Engine Diagnoses

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180 either direction and clunk? If I wanted to sabotage an engine. I might just drop a bolt down the air intake. Piston coming up to TDC is blocked by the bolt.

Brad
Nope...180 from up to down...not 360...sorry
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Old 26-07-2011, 21:08   #29
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Re: Engine Diagnoses

Aloha Martin,
This is a hard one. If the engine were seized there would be no turning so at least you know its not burned up. If you can turn it 180 then whatever is clunking to stop it would be a 2 to 1 ratio otherwise it'd be 360 to the clunk stop. Does that make sense? Camshaft has a 2 to 1 ratio and maybe some of the fuel injector pump gearing? Maybe the bolt in the intake would be an explanation on a 4 cycle?
I'll be up all night thinking about this one!
kind regards,
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Old 26-07-2011, 22:32   #30
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Re: Engine Diagnoses

Damned mysterious cant wait for the conclusion. Seems like all possibilities have been covered, but wait?
This is the best thread in an awfully long time.
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