Back ground - I converted the engine (1990 302) to carb from EFI. Went with TFI heads and cam, Edelbrock Intake, QFT carb and MSD Ignition system and new roller lifters. All went well, started easily and performed great. After one or two oil changes the lifters became noisy at start up and don't quiet down for up to 2 minutes?
I use Motocraft filters, run 5-30W Castrol oil but the noise at start up still persists. So this weekend I decided remove the intake and the lifters, clean check and refit to see what the result would be. Firstly, I noticed that about half of the lifters had bled down, not unusual I know but why do some bleed down and others not? Anyway cleaned and re-installed, set the pre-load (half turn) which works out to be about 0.060" of the 0.250" lifter range.
Fired up and still noisy as before!!
Hopefully someone else has been through this loop and can help with some suggestions?
Cheers, John
I have posted on the 'other' forum also to broaden my chances of getting answers.