502 efi heads
My buddy has a 95 cobalt 232 witha 502 merc about 280 hours, wants to do the heads this offseason, we live in the pnw so where in the Seattle area is a good place to drop them off for a reliable upgrade overhaul done right. Thanks all!
mine aren't much behind so where do people go and who do they trust to do their work over on the wet side? |
Originally Posted by buck35
(Post 4362697)
My buddy has a 95 cobalt 232 witha 502 merc about 280 hours, wants to do the heads this offseason, we live in the pnw so where in the Seattle area is a good place to drop them off for a reliable upgrade overhaul done right. Thanks all!
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With 280 hrs on a 502 mag, I wouldn't waste the time or money.
Especially not without doing at least a leakdown test to determine if there is even an issue. |
Yes they are both mags , it has been my understanding that at 250ish you're playing with fire. No?
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I might add my friend is an airline pilot, and dammed particular about preventative maintenance.
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Originally Posted by buck35
(Post 4362764)
Yes they are both mags , it has been my understanding that at 250ish you're playing with fire. No?
I have almost 600hrs on my 502mpi's and have a few friends with 1000+ on them and they've never been touched. The 250ish hours top ends is for HP500's. A lot more cam and a lot harder on the valve train. |
Good to know , thank you.:)
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I agree, waste of time for a stock 502, I wouldn't even think about it until 500hrs at least.
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Originally Posted by buck35
(Post 4362697)
My buddy has a 95 cobalt 232 witha 502 merc about 280 hours...where in the Seattle area...mine aren't much behind...
then you have extra concerns. Exhaust/riser gaskets, corrosion in the heads and block, and a restricted water intake fitting can be a time bomb for you. If you just want to get a little more speed then a top end upgrade can get you an easy 120HP. There are many 502 upgrade threads here as well as the famous 502 EFI upgrades articles from Hot Boat. I have them and they are a great read. Also the "Crockett kit" is a proven winner.(https://www.facebook.com/pages/Tyler...03730003027995). I can't find Tyler's website. Since you guys are in the PNW OSO's area expert is Alex Haxby(http://www.haxbyspeed.com/). He can do anything you want done to your 502's. A few searches and you will have days of "502 upgrade" threads to research. My Cobalt 233's 502 MPI has 482 hours and runs better than the day it was built. I made a few "safety" upgrades for longevity. |
Yeah haxby is on my short list of people to visit, but we are in central Washington in the desert about 5 or 6 hours away. No salt in our motors.
I'd love another 100 horses! |
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