Car is not overheating, but I am getting air in the cooling system somehow. When accelerating from a stop, I get a "glug, glug" noise at the firewall. No leaks. I replaced the radiator cap without luck. I noticed that this noise began when my water pump started making a high pitched whistling noise during winter. The water pump noise only happened when it was very cold outside. Only lasts maybe a minute or two. Now that it is summer, doesn't do it. However, wondering if a bearing is starting to go and is allowing air into the system.
Looks like the harmonic balancer is in the way of all water pump bolts. But I don't want to remove this part unless necessay. Looks like a pain to remove the balancer, and it has to be tightened to a ridiculous torque. Has anyone here changed this part on this engine (m119) without removing the balancer? Can't seem to find a straight answer on this engine and year. Included picture of what my model's balancer looks like because I think the design changed over time.
I am aware that the workshop manual says to remove the balancer. But it apparently says this for other models and other folks have changed the water pump without removing the balancer.