oil cooler too small?
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oil cooler too small?
I blew up my sea water impeller (forgot to turn on the garden hose for 5 seconds) so I took the oil cooler out to make sure it wasn't plugged. After an hour of hanging upside down in the bilge and all the bruises, swearing and blood, I think I'll upgrade the cooler, now, and avoid a repeat contortsionist exhibition.
How big do I need to go fo a 530 h.p. 502 running in relatively cool lake water (never over 70°F)? I have an integral p/s oil cooler.......so the new cooler will need to be a combo p/s and engine unit. Last season, I would only see 40psi hot WOT and 10 hot idle with conventional 50wt.
Here is a pic of the current one.
How big do I need to go fo a 530 h.p. 502 running in relatively cool lake water (never over 70°F)? I have an integral p/s oil cooler.......so the new cooler will need to be a combo p/s and engine unit. Last season, I would only see 40psi hot WOT and 10 hot idle with conventional 50wt.
Here is a pic of the current one.
#2
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Re: oil cooler too small?
I would question your pressure ...40lb at WOT is low ...some say no ..but I run 55-60lbs at WOT and about 30-40 at idle .....also running in a cool lake like that seems you would need to look at installing a Thermostat for the oil cooler .....you would have too cool oil temps ... you need the oil to be a flashpoint to vaporize any moisture in the oil .... .02 ...
#3
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Re: oil cooler too small?
I used a Merc HP500 cooler on mine and left the combo cooler in place for the P/S cooler.
My 540s never see over 250* and rarely over 220* at normal cruise 3000 rpms.
My 540s never see over 250* and rarely over 220* at normal cruise 3000 rpms.
Last edited by mopower; 05-23-2005 at 06:02 PM.
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Re: oil cooler too small?
mopower,
thanks for the photos. So, the HP500 uses a 2"x17" or 3"x17"? I can't tell from the pic. A big thermo cooler and hoses / adapters / clamps to plumb it and you could easily hit $600-700. Cool oil is cool, but damn. I'm hoping to get away with a 2x18 combo. Without changing to AN hoses, it doesn't seem that easy to adapt the 1" NPT to 1-1/4" slip on.
stingray69,
I use McMaster-Carr and Graingers for fittings, but neither has what it would take to get from 1"NPT to 1-1/4" slip-on without using about 3 or 4 adapters on each end of the cooler. that sux. maybe cutting / brazing our own fittings would be the way to go.
thanks for the photos. So, the HP500 uses a 2"x17" or 3"x17"? I can't tell from the pic. A big thermo cooler and hoses / adapters / clamps to plumb it and you could easily hit $600-700. Cool oil is cool, but damn. I'm hoping to get away with a 2x18 combo. Without changing to AN hoses, it doesn't seem that easy to adapt the 1" NPT to 1-1/4" slip on.
stingray69,
I use McMaster-Carr and Graingers for fittings, but neither has what it would take to get from 1"NPT to 1-1/4" slip-on without using about 3 or 4 adapters on each end of the cooler. that sux. maybe cutting / brazing our own fittings would be the way to go.
#5
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Re: oil cooler too small?
Just ran downstairs and checked 2x17. I got twins and if I remember correctly , it's been 2 1/2 years , I think I paid about $800 for two coolers. Then throw in some push lock hose and fittings , more 1 1/4" water hose , some clamps and I was probably around $1100 or $1200
So you say you want a fast boat , huh
So you say you want a fast boat , huh
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Re: oil cooler too small?
mopower,
thanks again. huge help. From what you've said, I should be able to live with a 3"x22" w/ p/s cooler from Eddie Marine. I can stick with the slip on 1-1/4" hose and switch to braided AN hose for engine oil. thanks, Buck
thanks again. huge help. From what you've said, I should be able to live with a 3"x22" w/ p/s cooler from Eddie Marine. I can stick with the slip on 1-1/4" hose and switch to braided AN hose for engine oil. thanks, Buck
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Re: oil cooler too small?
patriyacht,
thanks, i'm trying to get the right size cooler so I can avoid the need for a thermostat and not run too cool. the lake water is 50°F now and it'll be august til it break 65.
thanks, i'm trying to get the right size cooler so I can avoid the need for a thermostat and not run too cool. the lake water is 50°F now and it'll be august til it break 65.
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Re: oil cooler too small?
Originally Posted by jwbbuck
patriyacht,
thanks, i'm trying to get the right size cooler so I can avoid the need for a thermostat and not run too cool. the lake water is 50°F now and it'll be august til it break 65.
thanks, i'm trying to get the right size cooler so I can avoid the need for a thermostat and not run too cool. the lake water is 50°F now and it'll be august til it break 65.
Btw, you were flirting with disaster with that small cooler. Get an oil temp gauge and at least a 2 x 18 cooler.
Last edited by PatriYacht; 05-24-2005 at 03:30 PM.
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