Early signs of leaky headers 525s
#12
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iTrader: (6)
Early signs are a lot of steam and when they get real bad it will hydrolock the motor. If you pull the plugs you will see traces of rust from water inhilation..my advise is to junk the headers..unless you have more patience than I do...I am not a big fan of those headers and I have sent them back many many times and they don't last..If you want to do it right get yourself a set of stainless marines.they are lighter in weight and they make more power on a dyno..I have tested them ..
This guy is my mechanic. My headers leaked 3 times causing two top end rebuilds. He wouldn't re install the junk CMIs after the 3rd time(probably saving me $$ and headaches) so I went with the Stainless Marine set up. 2 years with no problems. I had them painted blue to match the motor. They look great.
Signs of leaking are steam, hard starting, feeling like its only running on 6-7 cylinders...
Signs of leaking are steam, hard starting, feeling like its only running on 6-7 cylinders...
#13
Registered
Hours, salt water and a bunch of other things play a part. Mine started to fail around 200 hours which is pretty common for a boat used mostly in salt water.
#17
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High oil temps were the first sign on mine and also on a friends 38TG.
#18
I've posted this already about 100 times, but the way to keep up these headers, ESPECIALLY in salt water is to flush them religiously, EVERY time you run the motor, no matter what. And I drain them once they cool down. I also pressure check them every 10-15 hours with an air compressor and a leakdown tester (ie: drain them, fill them with compressed air and see if they lose pressure).. You can do this safely with the headers attached to the engine. Don't do this with water while attached to engine because if you do have leaks, you will force water into the cylinders..
#20
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