Boat running hot on plane PLEASE HELP

[Robertpel9]

Re: Boat running hot on plane PLEASE HELP

they said they mean maybe rust or pieces of rubber inside the water jacket???

In reading that it looks to me like the first thing to do without having the other materials (Clear hose, gauges, etc) if i am reading it right (I am a real novice with this) is to take the top hose off the water pump and at the other end which i guess connects to the ps cooler and flush that out.

Is that correct

 

[Don S]

Re: Boat running hot on plane PLEASE HELP

Before you start buying all the gauges and plumbing, put a piece of clear hose on the pump intake hose, then take it for a run and see what happens when you get on plane.

 

[Robertpel9]

Tried a DIY repair and now more issues, Impeller housing leaking (Please look at pic)

Tried a DIY repair and now more issues, Impeller housing leaking (Please look at pic)

As part of my overheating diagnosing i removed hoses today and did a lot of flushing. Everything was fine. When i hook everything back up the bottom part of the impeller housing is shooting a fine spray of water out of it. I took a pic and where my finger is is where it is shooting out from. I think when i took the bottom hose off i put too much torsion on it and created a failure in the hard plastic piping that the hose goes over. I have pointed out with my finger where the water sprays out. The more throttle i give it, the more water comes out, it is not drivable in this state

Two main questions.

1) Does anyone know what this part is. Is it a case where i have to buy an entire new housing or can you just replace the hard plastic pipes going into it or can they be sealed with an epoxy

2) There was no gasket found. I see on the engine side of this (not pictured there is a new oring (I just had the impelller installed by a service facility - now at least i have learned the hard way how to do it myself in the future I cannot break away from work tomorrow but my wife is going to take this entire piece you see here to the parts desk at the marina. What specifically should she be asking for. It is for a 1999 Volvo Penta 5.7GS engine. I know i need the plastic tubes at a minimum but is there a missing gasket too that should be installed

Lastly when i took this apart only three screws were holding it on. Apparently someone left the 4th screw out. Could this be the source of my overheating. I am wondering that if it is not screw down all the way around could it be sucking air in causing the overheat

The main thing is getting this reinstalled right at this point. Please let me know what P/N or at least part description i am looking for it. Both hard plastic pipes sticking out of this housing are loose enough to spin

Thank so much
Robert

 

[Robertpel9]

Re: Tried a DIY repair and now more issues, Impeller housing leaking (Please look at

Re: Tried a DIY repair and now more issues, Impeller housing leaking (Please look at

Foun the P/N for this here

http://www.marinepowerservice.com/B...D=122862&parent_cat=450466&parent_cat1=450491

I am not looking to spend another 100 unless i have to

I also can see here that i am not missing a gasket and that the oring is the only thing that is supposed to be there and it is

I run a mfg plant for a living and i am going to ask my machinist and building maintenace guys if there is any way they can seal this back together. The two plastic pipes stick out go all the way up into the metal impeller housing. There are no visible cracks or anything and i cannot see anything with a flashlight either so i am assuming i just have a pinhole somewhere.
what would be the best way to go about sealing this that eliminates the possibility of failure? Obviously i will buy a new housing if they cannot but i am think this cant be that hard to epoxy seal or something

What do you all think?? Looks here like someone else had the same exact problem and they are advising to weld metal pipes into it vs using epoxy??

http://www.boatingabc.com/forums/ubbthreads.php/topics/459816/5_7L_volvo_penta_raw_water_coo.html

 

[Robertpel9]

Re: Tried a DIY repair and now more issues, Impeller housing leaking (Please look at

Re: Tried a DIY repair and now more issues, Impeller housing leaking (Please look at

Ttt

 

[Robertpel9]

Re: Boat running hot on plane PLEASE HELP

I pulled multiple hoses today and flushed them out, no debris or sing of wear. I will be trying to use the clear hose on the intake of the Waterpump ASAP. I cracked part of the impeller housing working on the hoses today and need to correct that hopefully tomorrow

 

[Bondo]

Re: Tried a DIY repair and now more issues, Impeller housing leaking (Please look at

Re: Tried a DIY repair and now more issues, Impeller housing leaking (Please look at

I think when i took the bottom hose off i put too much torsion on it and created a failure in the hard plastic piping that the hose goes over.

Ayuh,... I Agree,... Now you know better than just yanking the hose off,...
Try a small pick between the hose,+ housing to free them...

Buy part # 5 in your link,...
A Hundred Bucks is a pretty Cheap repair on a boat...

 

[Don S]

Re: Tried a DIY repair and now more issues, Impeller housing leaking (Please look at

Re: Tried a DIY repair and now more issues, Impeller housing leaking (Please look at

Please don't start two different threads about the same problem, it's confusing.
I merged the two posts into the original thread. Now everyone can see the complete story.

 

[Robertpel9]

Re: Boat running hot on plane PLEASE HELP

Sorry for confusing things with a 2nd thread

I am going to see if my machinist at work can weld pipes onto it tomorrow before i buy another piece, i dont see any harm in it if i can, it should actually be an improvement (They come from Volvo like this now) and 100 bucks is a hundred bucks, if he can't then i will just buy the other piece

Lost a nice day on the lake today. It is scary to look at some other threads doing a search and seeing people have spent dozens of hours and thousands of dollars tracking these issues downa nd still having them in some cases. I hope mine does not end up like that. This was such a mint boat and it runs so well i would like to just leave it alone vs going treasure hunting but i want it to be "right"

Is there any chance that just the one missing screw holding the housing onto the main unit for the impeller was letting air into the system?? Any chance i am going to egt real lucky tomorrow night any just by having all 4 screws holding it on vs three my temps may fall??

 

[HT32BSX115]

Re: Boat running hot on plane PLEASE HELP

Is there any chance that just the one missing screw holding the housing onto the main unit for the impeller was letting air into the system?? Any chance i am going to egt real lucky tomorrow night any just by having all 4 screws holding it on vs three my temps may fall??

It's possible that you're sucking a little air at high RPM. That pump moves quite a bit of water when it's turning fast. If you had a leak and it was on the "suction-side" of the pump it would suck air into the system and aerate the water. (which wouldn't cool as well as non-aerated water)

Putting a clear hose on the discharge side of the pump would reveal that.

I think that housing is bronze or brass. If it is, I suppose one could silver-solder or braze copper or brass nipples where the plastic ones go. he'll have to remove the original ones and make the metal shiny clean to get a good bond.
It's worth a try I suppose. (although if you had to pay someone to do it, it would far better to just buy another one)

I'd be ready to get another one anyway.....


Cheers,

Rick

 

[Don S]

Re: Boat running hot on plane PLEASE HELP

The crack is not on the suction side, but on the output side. That is why it was spraying water.
3 screws is another problem.
Fix everything that is wrong, and it might just stay cool.

 

[Robertpel9]

Re: Boat running hot on plane PLEASE HELP

the crack is a new thing i caused today, it was running warm before that

the three screws may have been an issue for a long time or ust since the other day when the shop replacd the impeller

hopefully my machinist can fix the part and i already bought the missing screw and that will resolve it. I am pretty confident it is going to be more complex than that but we will see

i hope to God i did not FUBAR up the nippe on the power steering cooler when i had to jam that hose back on earlier in tight quarter. My old boat had so much better access to everything

guess the first order of business is getting this part fixed and back on

 

[BLDFW]

Re: Boat running hot on plane PLEASE HELP

I had a similar problem with my '86 Bayliner. It was my first boat so I was pretty ignorant. It would run fine at 3900 rpms but the minute I got it 4000, the temp gauge climb FAST. It took me a year and a half to figure it out (did I say I was ignorant)(I didn't know about the available forums). Turns out as soon as the RPM exceeded 3900 the impeller created so much suction that it started pulling air through the seals in the outdrive and the water immediately ran out. I had the boat pulled and the outdrive resealed and the problem was immediately cured.

Water, on land, can be pretty insipid. Air, on water, can be equally insipid.

 

[Don S]

Re: Boat running hot on plane PLEASE HELP

My old boat had so much better access to everything

I suppose you don't want to hear the tales of the 2005 22' Bayliner that has to have the engine removed to replace the impeller do you? Or the 85 Campion that had to have the engine removed to do a tuneup.
Or how about the ones you can't touch the oil filter.

Design engineers probably go around in secret and never tell what they designed. Some of it is just plane stupid, and that can't be fixed.

 

[Robertpel9]

Re: Boat running hot on plane PLEASE HELP

Gave the part to my machinist today, he can pretty much build anything. He has some bronze and is going to be taking out the crappy plastic pipes and machining to exactly the same specs broze ones and then brazing them to the part.

At this point i think that is a better option then buying a new piece as it sounds to me at least that the part he gives be back is better than the part i will buy

He also reccomended using a small bead of silicone when mating the part back on and said a missing screw could certainly cause air to get into the system

Any thoughts on the use of a bead a silicone or am i better off just getting the 4 screws on there knowing i have a new o-ring on the engine side of the housing

 

[captmello]

Re: Boat running hot on plane PLEASE HELP

sounds like a plan.

I'd skip the silicone.

 

[Robertpel9]

Re: Boat running hot on plane PLEASE HELP

Machinist gave me part back WOW he is awesome, he took out the plastic pipes and silver soldered in prescision made bronze tubes that are EXACT replicas of the old plastic hoses, this thing is indestructable now

Should any loctite or something be used when i put the 4 screw in to tighten down the impeller housing? It seems a lot to ask for 4 chintsy screws with no gasket or sealant to hold tight. I am SOOOOO hoping my cooling issues have been a missing screw and the system sucking air in at the impeller housing

am i dreaming that one missing screw could have caused bubbles and be the root cause of all this

cant wait to get home and do the install

 

[studdy05]

Re: Boat running hot on plane PLEASE HELP

I have to be awefully suspect of some guages when a guy can lay his hands on risers and they only feel warm yet the temp guage says the water is near boiling.

Warm to the touch is generally 100 to 130 degrees. At 140 degrees, the hand can't really touch something more than a second or two. At 200 degrees, I pretty much scream.

Hmmmmmmmmm

(When my boat is running hot, at say 190ish, which is where I will shut it off, I don't wont no part of my risers at 170ish. And the intake manifold just below the carb will read probably 210 with an IR guage. Done the readings 100 times. Different boat, different engine, but physics is still working none the less.)

 

[Robertpel9]

Re: Boat running hot on plane PLEASE HELP

I want to be sure what i am referecing as a raiser really is.

When i put my hand on the flat top part of the exhaust (On the left side looking at the engine there is some sort of control box and on the right side it is jsut the part itself. Basically this is the wop part of the exhaust manifold which is the highest part in the engine bay.

I can rest my hand on those with no issue. Yes it is warm to the touch but i can leave it there for a while before it becomes uncomfortable. Is that the "riser". Regardless of what it is that is not hot to touch.

If i touch part of the thermostat housing sometimes it is just warm to the touch and sometimes it is hot all all heck

Please let me know. Tonight i am putting in my new and improved impellar housing and hoping for the best

 

[Robertpel9]

Re: Boat running hot on plane PLEASE HELP

I just did a google image search and yet i am definitely touching the top of the riser coming off of the exaust manifold and it is just warm - not hot. My mechanic said they should be pretty cool to the touch but even if the boat is running normal and pushing out 160 degree water wouldnt that still be warm??

I am going to bring an IR gun home today from work to test it but i am telling you the risers are not all that hot. The T-stat housing is considerable warmer