- Joined
- Oct 11, 2022
- Messages
- 6
My 2006 Colorado has timing chain rattle at startup for just a few seconds then it's fine. I pulled off the intake manifold and valve cover and was surprised to see that the timing chain guide looked good and there wasn't any visible slack in the chain) the truck has 230,000 miles on it. I asked the person I bought it from and he said he had the timing kit installed at 180,000 miles and it has made the noise at startup every since. He said he was told that it takes a few seconds for the oil to get to the hydraulic tensioner. I had been using the same brand and # of oil filter he had used with it and upon looking into it, that filter doesn't have an anti-drainback valve so I switched to a Fram Toughguard filter this time, but I am changing the oil anyways and am wondering if heavier or thinner oil would help the tensioner get enough oil at startup to eliminate or at least reduce the rattle. I asked a few local mechanics and one said switch to synthetic 0w40, another told me 20w50. I figured I would get a better answer on here. I was thinking Mobil 1 synthetic since I can't get amsoil near where I live unless someone else has a recommendation of a better brand. The weight is my main question though. The truck has had 5w30 in it up until now.
Thanks in advance.
Thanks in advance.