Car Makes Ticking Noise After Oil Change...

[Muff]

i Had the same probel im my r33gtst and in my r32 gtr...

i was using all sorts of sythetic oils and it never changed.\

i got told to run Penrite hpr 50

yes its a 10 w 50 but shuts the engine up..... with the gtst it was the lifters. and with the gtr it was the solid cams

i also found that buy running octane booster it made it quieter, not sure if u had ur timing belt done ova here or in jap , but make sure that they have retarded the exhaust cam buy at least a degree. mainly because of the lower octane fuel.....

hope this helps..

good luck

[Birds]

This indeed sounds like the lifters to me. Couple of possibilities regarding them:

1. Previous owner hasn't changed the oil for a LONG time. What actually happens in this scenario is that the engine wears rather badly but simultaneously becomes gunked up with old oil and accustomed to running on said gunk. Not only this, but the gunk also silences the engine wear. On oil change, particularly if you use an engine/oil flush like you did, this gunk is removed and the engine wear shows it's true colours/sounds with the fresh oil. In the worst of cases (talking several thousand km without an oil change), fresh oil and a motor flush can do more harm than good. This is why I avoid motor flushes in general on old engines...I would only use them from new.

2. The lifters had a noise problem that was silenced by the previous owner using a heavier viscosity oil. Your previous oil pressure indicates this is the case. This can indeed silence the problem, but I don't recommend doing this at all (unless you have an old large displacement oil burner), because it comes at the expense of extra strain on the rest of the engine - and all it does in the end is silence the problem. Noisy lifters on idle can be silenced properly by using a thinner oil, as noisy lifters on idle are frequently caused by oil not getting into the lifters themselves quick enough due to unnecessarily heavy viscosity. Unfortunate reality of noisy lifters, is that if you are using a correct viscosity (10w40 is about perfect for street driven Skylines) but you still have noise then they will only get worse over time (takes a while) and replacing them is the only true fix.

Could also be a combination of both possibilities.

Hope that helps.