LippCJ7
Vice Admiral
- Joined
- Sep 20, 2010
- Messages
- 5,431
Re: What to expect
no, the worst case scenario is that you warped the heads, scored the bearings or something of that order, yes you could have damaged the motor but I doubt it depending on how hot the temp gauge was at its hottest, if you do have water intrusion its because you warped the heads or cracked a cylinder.
The exhaust manifolds are fairly robust provided they are the OEM, and melting the rubber exhaust hoses would certainly be a byproduct of no water in the exhaust.
I would fix it properly mark the hoses on the sea water pump, and change the oil again, changing the oil is something every mechanic does regularly, and this would certainly be one of those situations where I would just because with the heat in the motor the oil paid a hefty toll but likely saved your motor, so replace it, if you see evidence of water in the oil you have bigger issues so make that your first part of the job, your oil will tell you everything you need to know.
1. Change motor oil, if no water then proceed to the other steps
2. replace and mark sea water hoses properly, a quick and easy way to determine which hose goes where is to hook the muffs up, yours is a Volvo so check into how you check the impeller, if it disintegrated you need to find the pieces, you may have to look into the engine water pump as well.
3. replace the exhaust hose and heat sensor on the manifold, I would probably replace both flappers in both sides of the exhaust I am sure they are done also with that amount of heat.
At this point start the motor and get the motor to running temp, watch for leaks in and around your manifolds, if you warped them then they will most likely need replaced. Check that you have good flow of water through your motor, if you do not you may have destroyed your engine water pump.
Your motor will take a lot of abuse, the rubber in the exhaust cannot take the full heat of the motor without water running through it and so any rubber on your exhaust is suspect, remember that, the flappers in your exhaust keep water from coming back up the exhaust and then into your motor, you did not reverse the flow of water into your motor you simply did not get water to it, you have two water pumps in your motor, and in this case they were working against each other.
Everything I have told you is my experience with GM motors and most boats some things may be inaccurate due to I have no experience with Volvo/Penta I have always been a Mercruiser guy, regardless you do not have a V/P motor, it is a GM 5.7 that is tagged V/P, its great motor as I stated earlier it will take a lot of abuse.
no, the worst case scenario is that you warped the heads, scored the bearings or something of that order, yes you could have damaged the motor but I doubt it depending on how hot the temp gauge was at its hottest, if you do have water intrusion its because you warped the heads or cracked a cylinder.
The exhaust manifolds are fairly robust provided they are the OEM, and melting the rubber exhaust hoses would certainly be a byproduct of no water in the exhaust.
I would fix it properly mark the hoses on the sea water pump, and change the oil again, changing the oil is something every mechanic does regularly, and this would certainly be one of those situations where I would just because with the heat in the motor the oil paid a hefty toll but likely saved your motor, so replace it, if you see evidence of water in the oil you have bigger issues so make that your first part of the job, your oil will tell you everything you need to know.
1. Change motor oil, if no water then proceed to the other steps
2. replace and mark sea water hoses properly, a quick and easy way to determine which hose goes where is to hook the muffs up, yours is a Volvo so check into how you check the impeller, if it disintegrated you need to find the pieces, you may have to look into the engine water pump as well.
3. replace the exhaust hose and heat sensor on the manifold, I would probably replace both flappers in both sides of the exhaust I am sure they are done also with that amount of heat.
At this point start the motor and get the motor to running temp, watch for leaks in and around your manifolds, if you warped them then they will most likely need replaced. Check that you have good flow of water through your motor, if you do not you may have destroyed your engine water pump.
Your motor will take a lot of abuse, the rubber in the exhaust cannot take the full heat of the motor without water running through it and so any rubber on your exhaust is suspect, remember that, the flappers in your exhaust keep water from coming back up the exhaust and then into your motor, you did not reverse the flow of water into your motor you simply did not get water to it, you have two water pumps in your motor, and in this case they were working against each other.
Everything I have told you is my experience with GM motors and most boats some things may be inaccurate due to I have no experience with Volvo/Penta I have always been a Mercruiser guy, regardless you do not have a V/P motor, it is a GM 5.7 that is tagged V/P, its great motor as I stated earlier it will take a lot of abuse.
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