Hey Guys
MichaelWan started a thread a little earlier about a recommendation for my engine. It's a twin turbo, sleeved, deckedd VQ35.
Here is the UOA I got for the engine. You KNOW it's bad news when they actually CALL you to tell you about your report. Let's hope that's not the case. Obviously I am very concerned about the antifreeze in the oil. this engine is sleeved, and the sleeves do not have o-rings for a total seal. So antifreeze leaking passed them is not out of the question. Another point, we definitely DID have a head gasket leak, and this is thr UOA for the oil that was put in right after the repair. So, there could be some residual from the previous fill when there WAS a leak. Is this feasible?
A couple of corrections. The miles on this ENGINE (not the total mileage on the car like indicated in the report) is actually about 4000-5000 miles (can't remember), with about 1500-2000 on this oil, not 3 (again I could be wrong).
Visually, the oil looks good. I do not have the antifreeze smell like I did before, no headgasket leaks now. Once however, when I was beating on the car right before the oil change, the level in the coolant did go up, which sent chills through my spine. There must have been head lift from possible detonation, as the car was in the process of being tuned. The air bled out of the system in the next couple of hundred miles of driving, so the worst case scenario is that the head gasket needs replacing again or the studs need to be retorqued. Point being, could there be coolant passing into the crankcase fromthis one event (which never repeated).
Thanks for all your comments guys... Much appreciated. Please tell me what you all think, not just about the antifreze (which is determined solely by sodium and potassium numbers i am told), but about the entire UOA. At least the lead number is good.
Gurgen
[ July 12, 2005, 04:44 PM: Message edited by: Gary Allan ]
MichaelWan started a thread a little earlier about a recommendation for my engine. It's a twin turbo, sleeved, deckedd VQ35.
Here is the UOA I got for the engine. You KNOW it's bad news when they actually CALL you to tell you about your report. Let's hope that's not the case. Obviously I am very concerned about the antifreeze in the oil. this engine is sleeved, and the sleeves do not have o-rings for a total seal. So antifreeze leaking passed them is not out of the question. Another point, we definitely DID have a head gasket leak, and this is thr UOA for the oil that was put in right after the repair. So, there could be some residual from the previous fill when there WAS a leak. Is this feasible?
A couple of corrections. The miles on this ENGINE (not the total mileage on the car like indicated in the report) is actually about 4000-5000 miles (can't remember), with about 1500-2000 on this oil, not 3 (again I could be wrong).
Visually, the oil looks good. I do not have the antifreeze smell like I did before, no headgasket leaks now. Once however, when I was beating on the car right before the oil change, the level in the coolant did go up, which sent chills through my spine. There must have been head lift from possible detonation, as the car was in the process of being tuned. The air bled out of the system in the next couple of hundred miles of driving, so the worst case scenario is that the head gasket needs replacing again or the studs need to be retorqued. Point being, could there be coolant passing into the crankcase fromthis one event (which never repeated).
Thanks for all your comments guys... Much appreciated. Please tell me what you all think, not just about the antifreze (which is determined solely by sodium and potassium numbers i am told), but about the entire UOA. At least the lead number is good.
Gurgen
[ July 12, 2005, 04:44 PM: Message edited by: Gary Allan ]
