Originally Posted By: JHZR2
Originally Posted By: fredfactory
High viscosity itself protects cold.
Assuming you get flow... Which isn't guaranteed using sufficiently heavy lubes in low temps. And that other issues, like hydraulic tensioning of the timing chain.
The ADBV on oil filters should keep the journal bearings wet for the next cold start. Oil is there and getting pumped quickly 'cause the galleries are full always from the pump to the bearings. (Not sure about the oil being all the way up the pickup tube though.)
Cast-Magnatec markets their oil based on its sticky and stays on the cam lobes waiting for the next start.
Hydraulic tensioning problems are something I noticed on an '04 Chrys 2.7L v6 a while back, the timing chain flopped around on startup, then settled down, so good point there.
Originally Posted By: fredfactory
High viscosity itself protects cold.
Assuming you get flow... Which isn't guaranteed using sufficiently heavy lubes in low temps. And that other issues, like hydraulic tensioning of the timing chain.
The ADBV on oil filters should keep the journal bearings wet for the next cold start. Oil is there and getting pumped quickly 'cause the galleries are full always from the pump to the bearings. (Not sure about the oil being all the way up the pickup tube though.)
Cast-Magnatec markets their oil based on its sticky and stays on the cam lobes waiting for the next start.
Hydraulic tensioning problems are something I noticed on an '04 Chrys 2.7L v6 a while back, the timing chain flopped around on startup, then settled down, so good point there.