Why would Gil Manifolds crack?
12-24-2007, 06:56 AM
#11
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My brother has a set for sale too for BBC. His do not leak, etc.
He has a full custom dry setup for a 22 Donzi classic, with the water dumps past the transom so you don't have to drill holes. He took it off because it was LOUD.
He has a full custom dry setup for a 22 Donzi classic, with the water dumps past the transom so you don't have to drill holes. He took it off because it was LOUD.
12-24-2007, 08:56 AM
#12
Racer
Thanks for the advice, but next time. I've invested in Gil for tails and one set already, otherwise I'd by these from Bad Enough.http://www.offshoreonly.com/forums/s...d.php?t=175626
Here in Ontario, the most common reason for cracking is frost - typically water left in the exhaust maifolds and freezes over the winter.
Do Gils (or any cast) have have a habit of cracking? What stress causes this? The weight of the risers vibrating?
Here in Ontario, the most common reason for cracking is frost - typically water left in the exhaust maifolds and freezes over the winter.
Do Gils (or any cast) have have a habit of cracking? What stress causes this? The weight of the risers vibrating?
The casting in that area is real thin and can not take excessive heat. I had a problem with them 15 years ago and thay were at the Miami Boat show and at that time they said they were going to change the casting and make it thicker in that area but I don't think it happened.
12-24-2007, 09:28 AM
#13
Geronimo36
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The casting in that area is real thin and can not take excessive heat. I had a problem with them 15 years ago and thay were at the Miami Boat show and at that time they said they were going to change the casting and make it thicker in that area but I don't think it happened.
12-24-2007, 09:50 AM
#14
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So as soon as the impeller went kaput, no water to the manifolds and bingo - the manifolds get so hot they crack?This situation isn't specific to Gils, is it? I would guess any cast aluminum would suffer under these conditions, including heads...anybody fooled around with an electric water pump as backup?
12-24-2007, 10:25 AM
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Well, I had one set with long tails included in a package deal from Blown Formula and already had a set of mid-length Gil tails from a previous deal.I like the weight savings and the design of the Gil flange (with bolts) - the quality of the tails is superb. I don't have any experience with either manufacturer but need to complete the setup, so thought I'd ask for some history lessons.
Thunderstruck is going to sell me at least one set, perhaps two so I have a couple of spares for the ones I break!
12-24-2007, 04:23 PM
#17
Geronimo36
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So as soon as the impeller went kaput, no water to the manifolds and bingo - the manifolds get so hot they crack?This situation isn't specific to Gils, is it? I would guess any cast aluminum would suffer under these conditions, including heads...anybody fooled around with an electric water pump as backup?
We had so many failures with the water pump/fuel pump assembly is was rediculous... it actually got to a point that the housings were on back order and it was hard to get a pump assembly....
Just stating my experience when I did this for a living... nothing more..
12-25-2007, 11:10 AM
#18
Well, I had one set with long tails included in a package deal from Blown Formula and already had a set of mid-length Gil tails from a previous deal.I like the weight savings and the design of the Gil flange (with bolts) - the quality of the tails is superb. I don't have any experience with either manufacturer but need to complete the setup, so thought I'd ask for some history lessons.
Thunderstruck is going to sell me at least one set, perhaps two so I have a couple of spares for the ones I break!
The problem is when they break they can take the engine with them. I just don't like to wait for it to happen.
12-26-2007, 08:45 AM
#19
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So, lack of coolant is what causes the Gils to crack...whether by water pump failure or extended "air" time could do it?
If the Gils are real sensitive to coolant presence, I guess this isn't the setup for offshore but more for smooth water racing. This is where the stainless would shine (no pun intended).
How do you guys keep the water pumps together when wave-hopping? I took the seawater pumps apart on the used 454's last week and I'm surprised at how vulnerable they are..isn't there a better design available than this?
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