Hi everyone,
been lurking for a while, first time posting. I've been working away on my Octavia (BXE engine, 109k miles), and am beating my head against the wall at the moment. Opinions, ideas, and "you're an idiot" all appreciated.
Engine started making a tapping sound and misfiring on a road trip. Took it to a few mechanics, they all listened and told me it wasn't worth me paying to have it fixed, the engine was toast. So I decided there wasn't much to lose, I'll have a crack at it myself.
Don't have a video of the original noise, but it was basically this:
After a bunch of reading, suspected worn camshaft, so popped off the valve cover and no surprises, one of the lobes was worn right down.
Ordered an Estas/GT camshaft kit, including lifters, from Lymm (mega helpful guys), got it all in, started her up, have run in the camshaft for 20-30 minutes at 2k rpm. Also while things were apart I popped off the sump, cleaned out the filings from the old camshaft, cleaned out the pickup and verified that the oil pump looked ok and the chain had tension. Spun the engine over and looked at the crankshaft, but didn't pop off any bearing caps. Put in a new oil filter and oil (507.00, so a bit lighter than the old oil), ran it for a minute with the cover off to verify oil was getting to the camshaft (it sprayed oil everywhere so I guess it's getting up there).
Anyway, things are not working as I would hope. Have the same tapping as before, but it is LOUD! Holy crap. I've run the engine for 20-30 minutes at 2k rpm with no improvement. I know that the hydraulic lifters take a while to pump up, but I wouldn't expect this level of noise, feels like I'm driving a tank. I wonder if anyone has had something similar, and has any advice?
My plan once I can get back to the car (bogged down with work atm) is to run it with the aux belt off to make sure it isn't something else, and perhaps to take off the cam again and make sure the lifters/oil galleys aren't blocked? (regretfully, I wasn't that careful about this when I put them in). Replacing the stretch bolts again is a drag though.
I didn't do any priming of the lifters, just put them in and let them bleed down, which I gather is fine.
Mistakes I have made: (1) don't own a fault code reader, (2) don't own a pressure gauge, haven't done oil pressure or compression (no oil pressure light though. I'm trying not to throw any more money after this.
Thanks chaps.
Tom