Sludge in Reservoir
06-05-2018, 09:42 PM
#61
Rennlist Member
I would not buy another 996. I would take your time and find someone who knows these engines and see if you can work out a deal. If my engine needed a repair like yours, I would not spring for an amazing rebuild and get everything done. Instead, I would try to find a complete used engine and try to get someone to swap it for you. Then you can determine what your old engine is worth, what it needs, etc. You could also buy a cheap 996, grab the engine, then sell the roller.
06-06-2018, 08:51 AM
#62
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I would not buy another 996. I would take your time and find someone who knows these engines and see if you can work out a deal. If my engine needed a repair like yours, I would not spring for an amazing rebuild and get everything done. Instead, I would try to find a complete used engine and try to get someone to swap it for you. Then you can determine what your old engine is worth, what it needs, etc. You could also buy a cheap 996, grab the engine, then sell the roller.
06-07-2018, 02:04 AM
#63
Rennlist Member
I would not buy another 996. I would take your time and find someone who knows these engines and see if you can work out a deal. If my engine needed a repair like yours, I would not spring for an amazing rebuild and get everything done. Instead, I would try to find a complete used engine and try to get someone to swap it for you. Then you can determine what your old engine is worth, what it needs, etc. You could also buy a cheap 996, grab the engine, then sell the roller.
06-07-2018, 07:26 AM
#64
An alternative view: if the purpose of flushing the cooling system is primarily to save the rubber coolant hoses then I wonder if the money is better spent on new hoses, especially since the intermix has been in there for 5 days now. Even at porsche price levels ~1300 $ will get you quite a few new hoses.
Another option would be to clamp the coolant hoses to and from the oil cooler and then flush.
Another option would be to clamp the coolant hoses to and from the oil cooler and then flush.
06-07-2018, 07:41 AM
#65
Drifting
You might just be surprised how expensive those porsche hoses are. And there are a ton of them. I replaced all of them in a 996 with intermix and it was VERY pricy.
06-07-2018, 10:03 AM
#66
Yeah, you're right I am surprised to see how much they are to replace. According to this post by Jake Raby they run 3k and that was in 2014...
@OP better do a DIY flush with the car on axle stands. Personally I'd take a gamble and presume the oil cooler to be ok and flush the system. Reason being that clamping hoses to and from it won't work as the coolant enters the cooler from the engine directly. The only hose connected to it is for bleeding and leads to the expansion tank see here Pelican and another view and additional info here.
@OP better do a DIY flush with the car on axle stands. Personally I'd take a gamble and presume the oil cooler to be ok and flush the system. Reason being that clamping hoses to and from it won't work as the coolant enters the cooler from the engine directly. The only hose connected to it is for bleeding and leads to the expansion tank see here Pelican and another view and additional info here.
06-07-2018, 12:57 PM
#67
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06-07-2018, 09:43 PM
#68
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I think flushing the cooling system to get the intermix out ASAP is a very good idea, especially If you are not at least prepared to do a top end rebuilt.
The chances of the problem being a crack in the head are very high, and the chances of getting intermix in your oil at this point are very low. Oil pressure can be as high 70psi, where coolant pressure will never exceed 15psi, hence a crack between the two will result mainly in oil getting into the cooling system.
If coolant gets into the oil, it has to come in while there is no oil pressure ( hot engine/coolant pressure... with engine off) or the breach is in an area that has no oil pressure.(AOS)..
I would get the cooling system flushed and then take your time and prepare for at least a top end rebuild/crack repair. Once prepared, drop the engine and first test the oil cooler and AOS,(if no prpblems) then proceed with top end repair
The chances of the problem being a crack in the head are very high, and the chances of getting intermix in your oil at this point are very low. Oil pressure can be as high 70psi, where coolant pressure will never exceed 15psi, hence a crack between the two will result mainly in oil getting into the cooling system.
If coolant gets into the oil, it has to come in while there is no oil pressure ( hot engine/coolant pressure... with engine off) or the breach is in an area that has no oil pressure.(AOS)..
I would get the cooling system flushed and then take your time and prepare for at least a top end rebuild/crack repair. Once prepared, drop the engine and first test the oil cooler and AOS,(if no prpblems) then proceed with top end repair
06-10-2018, 10:50 AM
#71
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I think flushing the cooling system to get the intermix out ASAP is a very good idea, especially If you are not at least prepared to do a top end rebuilt.
The chances of the problem being a crack in the head are very high, and the chances of getting intermix in your oil at this point are very low. Oil pressure can be as high 70psi, where coolant pressure will never exceed 15psi, hence a crack between the two will result mainly in oil getting into the cooling system.
If coolant gets into the oil, it has to come in while there is no oil pressure ( hot engine/coolant pressure... with engine off) or the breach is in an area that has no oil pressure.(AOS)..
I would get the cooling system flushed and then take your time and prepare for at least a top end rebuild/crack repair. Once prepared, drop the engine and first test the oil cooler and AOS,(if no prpblems) then proceed with top end repair
The chances of the problem being a crack in the head are very high, and the chances of getting intermix in your oil at this point are very low. Oil pressure can be as high 70psi, where coolant pressure will never exceed 15psi, hence a crack between the two will result mainly in oil getting into the cooling system.
If coolant gets into the oil, it has to come in while there is no oil pressure ( hot engine/coolant pressure... with engine off) or the breach is in an area that has no oil pressure.(AOS)..
I would get the cooling system flushed and then take your time and prepare for at least a top end rebuild/crack repair. Once prepared, drop the engine and first test the oil cooler and AOS,(if no prpblems) then proceed with top end repair
06-22-2018, 05:48 PM
#72
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So I want to give a quick update on the above plan. I am doing a contingency sale on one house while getting my home ready to sell. No way I can do a DIY on draining the intermix out of my coolant system.. I went by the Porsche dealer that has the machine that does a coolant flush without starting your engine..They quoted me $575 which I was happy to plunk down, but after calling the older model 911 specialist, the service adviser stated that it would be throwing my money away as it would'nt get alot of the crap out. I was surprised that they didnt want to take my money..,so i am at 40 days with intermix in the system,,,As my 911 is not my daily driver it is just sitting there..hopefully I will sell my house and close and then I can focus more time on a remedy...
06-22-2018, 06:13 PM
#73
Rennlist Member
So I want to give a quick update on the above plan. I am doing a contingency sale on one house while getting my home ready to sell. No way I can do a DIY on draining the intermix out of my coolant system.. I went by the Porsche dealer that has the machine that does a coolant flush without starting your engine..They quoted me $575 which I was happy to plunk down, but after calling the older model 911 specialist, the service adviser stated that it would be throwing my money away as it would'nt get alot of the crap out. I was surprised that they didnt want to take my money..,so i am at 40 days with intermix in the system,,,As my 911 is not my daily driver it is just sitting there..hopefully I will sell my house and close and then I can focus more time on a remedy...
Having that stuff in there that long is going to wreak havoc on the rubber/hoses, from my understanding.
Good luck with a quick home sale!
06-22-2018, 06:45 PM
#74
Rennlist Member
90 percent chance it will be a cracked head. The whole job will go smoother if you drop the engine and then clean and flush the cooling system. As there is a small possibility that the oil cooler is bad I would check that with the engine out before condemning the heads.
If you were in my shop I would quote you the worst case, repairing the cyl heads and if it turned out to be the cooler good. but I would not do the job without pulling the engine.
If you were in my shop I would quote you the worst case, repairing the cyl heads and if it turned out to be the cooler good. but I would not do the job without pulling the engine.
06-22-2018, 07:36 PM
#75
Burning Brakes
If it is a cracked he’d and you decide to rebuild the engine yourself, send the heads to Hoffman Automotive Machine. https://newsite.hamheads.com/
they are porsche head specialists and can repair most cracks and do a leak test, pressure test, and completely rebuild the heads for you. Highly recommended!
they are porsche head specialists and can repair most cracks and do a leak test, pressure test, and completely rebuild the heads for you. Highly recommended!