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Project Boat
Posted: Fri Aug 01, 2025 10:26 pm
by Constmgmt
New to me Cobalt. Needs heart surgery.
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Re: Project Boat
Posted: Sat Aug 02, 2025 5:27 am
by AsLan7
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So glad you found us cm…..
Let’s get her back to health. New fluids and plugs is a start. Hopefully they are not seized into the block. Keep us posted.
And welcome aboard mate.
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Re: Project Boat
Posted: Sat Aug 02, 2025 10:08 am
by jhnmdahl
Looks like a good, solid boat, with a lot of weekend projects - please do keep us posted on your progress!
Re: Project Boat
Posted: Mon Aug 04, 2025 4:40 pm
by Constmgmt
Update:
Picked op a beautiful old Cobalt with perfect interior. Purchased from 30 year owner. Cracked starboard manifold (temporary sealed) with permatex for diagnostics. Sat for 3 years. Found a 4 “ crack on both sides of block. No visible water in oil. Plugs all looked slightly fuel fouled, 150 compression on 7 of 8 160 on 1. No clean (steamed) plugs.
Ran it on muffs for 10 minutes up to temp 3 times. No milky oil.
holds at 150 degrees at 1,000-2,000 rpm
however steamy exhaust once operating temp achieved
assuming I have an internal crack. Not surprisingly. But looking for thoughts. Not against repowering.
[url][url] https://imgur.com/a/O8ukhwI[/url][/url]