Overheating at idle..

[devovino]

So on my shakedown cruise yesterday, I noticed my 87 Saltare (454) was getting pretty heated at idle from th moments I launched the old bird, but would cool down when underway? Thinking obvious things like impeller, did not replace /check it after winterizing it, also I noticed a bunch of cracks and some weeping from my fresh water intake hose, I will replace it, but could it be that at idle, it was sucking in air through the crack? Anywhoo, thanks in advance, Devon

[DAFF]

Think of sucking water through a straw with a split... Always inspect the hose between the impeller and the water intake and make sure all the clamps are tight after a winter slumber. While underway the water pressure was pushing the water up the hose and helping relive the seeping issue.

[devovino]

Think of sucking water through a straw with a split... Always inspect the hose between the impeller and the water intake and make sure all the clamps are tight after a winter slumber. While underway the water pressure was pushing the water up the hose and helping relive the seeping issue.

Hey Daff, that's a great way to put it,. I bought a new raw water intake suction hose, hope that is the "cracked McDonalds" straw of my problems!, i will get it on and go from there,tomorrow hopefully, Its supposed to be 100 by Tuesday! Hope that's the simple solution!

[CornRickey]

check the other connections also. the strainer is a common place for allowing air into the system.

[devovino]

So I replaced the intake hose, unfortunately that was not the culprit, i put the hose into a 5 gallon bucket and it was not drawing in any water, except for at higher revs, so I am ASSuming it is the impeler, and will pick it up tomorrow, and reinstall, I was hoping to not need one this year, seems like I just replaced it last year, such is life. However, while it was warm I drained the oil, as well as the "tranny" fluid to put new fluids in, have to figure out what fluid I need in the transmission, unless somebody will be kind enough to enlighten me....
Other than that, I hope it is actually the impeller, and not some other fubared component.....

[lively]

Change the impeller dude .. Lol and take it all apart to the thermostat , if you don't then you will be stranded again . Once it brakes it goes right in there to block everything up .

When you hear up at idle it will 90% be impeller . Other 10% is when you don't take it all apart and clean out the first time good luck


2qts for the tranny no more no less . It's dextron .. I believe ..

[devovino]

Change the impeller dude .. Lol and take it all apart to the thermostat , if you don't then you will be stranded again . Once it brakes it goes right in there to block everything up .

When you hear up at idle it will 90% be impeller . Other 10% is when you don't take it all apart and clean out the first time good luck


2qts for the tranny no more no less . It's dextron .. I believe ..

So yeah, as the tittle suggests, impellar imploded, missing 5 ( or so ) fins,,,, not able to account for all the "shrapnel"! Now what, just put a new impellar in and run it, and hope the pieces find their way to the exhaust covers at the end...

[Jetlink]

So yeah, as the tittle suggests, impellar imploded, missing 5 ( or so ) fins,,,, not able to account for all the "shrapnel"! Now what, just put a new impellar in and run it, and hope the pieces find their way to the exhaust covers at the end...

If that is your plan, then I hope you plan for the worst and hope for the best. Take you hoses downstream from the impeller apart as well as remove the thermostat and check for pieces. Also, are you a classic boat and if so are you running supertrapps?

[lively]

No , you remove the hose that goes upward to the thermostat housing . Then remove thermostat ( two allen head bolts on top ) scrap old gasket off with puddy knife or gasket scraper and inspect for fin particles . That's where they go . Follow the hoses to the housing from the raw water pump and remove flush and reinstall . Simple

[devovino]

No , you remove the hose that goes upward to the thermostat housing . Then remove thermostat ( two allen head bolts on top ) scrap old gasket off with puddy knife or gasket scraper and inspect for fin particles . That's where they go . Follow the hoses to the housing from the raw water pump and remove flush and reinstall . Simple

Well simple in theory... however it look like the PO never even had a thermostat installed....... hmmmm, explains why it always ran soo cool?!

I took it apart to where the thermostat should have been, not able to find any pieces of impeller anywhere, this is not looking good.

As far as a classic boat, I think they are all classics, but actually, not sure what you mean by that one. However, in looking at the exhaust caps, they are chrome caps with nuts on the end, and around the sides there is what appears to be rings of fins.