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Anyone change an Oil Thermostat in a HP500 Filter housing?

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Old 10-27-2014 | 07:43 AM
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Default Anyone change an Oil Thermostat in a HP500 Filter housing?

Has anyone ever changed an Oil Thermostat in a HP500 Filter housing? I see there is a C-clip to remove but what else holds in the thermostat?
Thanks,
Dean

http://www.mercruiserparts.com/Show_...nd+Oil+Adaptor
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Old 10-27-2014 | 10:17 AM
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Dean, I have done it, but its been a while. I do believe once you remove the c clip, you can use some needle nose pliers to gently wiggle the black plastic cap and pull it out. There will be a spring, and the thermostat element behind there.

Are you still having oil temp/pressure issues?
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Old 10-27-2014 | 10:22 AM
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make sure you replace the o ring on the black part that comes out after the snap ring.
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Old 10-27-2014 | 10:47 AM
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Originally Posted by MILD THUNDER
Dean, I have done it, but its been a while. I do believe once you remove the c clip, you can use some needle nose pliers to gently wiggle the black plastic cap and pull it out. There will be a spring, and the thermostat element behind there.

Are you still having oil temp/pressure issues?
MT,
Thanks and yes still have oil temp /pressure issues. Thanks for the info. I have a new thermostat and the 0-rings also.
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Old 10-27-2014 | 10:49 AM
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Originally Posted by mike tkach
make sure you replace the o ring on the black part that comes out after the snap ring.
Mike,
Thanks I ordered the o-ring, (2) o-rings came in the package from Merc..
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Old 10-28-2014 | 10:05 AM
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I find it easier with another set of hands when going back together. Use a socket that just fits over the center nipple and use it to push down on the cap. Have someone else install the snap ring. You can do it by yourself, but it's easier with 2 people. Just be sure that the snap ring is completely seated. It's a very straight forward job.
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Old 10-28-2014 | 11:35 AM
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Originally Posted by Young Performance
I find it easier with another set of hands when going back together. Use a socket that just fits over the center nipple and use it to push down on the cap. Have someone else install the snap ring. You can do it by yourself, but it's easier with 2 people. Just be sure that the snap ring is completely seated. It's a very straight forward job.
Eddie
Eddie,
Thanks for the tip! It's already a tight fit with the engine hatch being in the way. Eddie have you seen many of these thremostats fail closed?
Thnaks
Dean
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Old 10-29-2014 | 12:16 PM
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Originally Posted by Young Performance
I find it easier with another set of hands when going back together. Use a socket that just fits over the center nipple and use it to push down on the cap. Have someone else install the snap ring. You can do it by yourself, but it's easier with 2 people. Just be sure that the snap ring is completely seated. It's a very straight forward job.
Eddie
Eddie,
Great talking with you today, thanks for taking the time to educate me.
Dean
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Old 10-30-2014 | 09:37 AM
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My pleasure. Call any time.
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Old 10-31-2014 | 10:41 AM
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Hi Dean

I think I may have need to replace one of mine as well, I recently noticed my port side oil temp on mine climbs to 230 & stays there for a bit & rapidly drops back to 180, it did this a couple times, & each time stays at 230 for longer period ... ( SB stays @ 180-190 while cruising @ 3200) would this indicate a possible oil stat issue?
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