Ok, one other issue...
My car is making a weird clacking noise. It did this once before and all I did was warm it up and it stopped. It does not show any loss of power or rough idle. I was thinking about just doing a good tune up, cap and rotor, plugs, oil change and seeing if that fixed it... But I honestly have no idea whats wrong or if that will have any effect.
What can I do to diagnose this?
Adjust the valves. simple as that, or so it may seem
Might be the hydros. Horizontally mounted hydraulic lifters are notorious for collapsing and clattering, and they can pump back up while operating. The lifters require REALLY clean oil to operate and dirty oil has caused many a noise. Replaced the filter recently with a good one? Crap filters plug blow the one shot pressure relief valve and stop filtering.
Only thing that works on my Vanagon is 20-w50 synthetic oil and a Mobile 1 filter with the spring loaded pressure relief valve. Ever take apart an engine run on synthetic? Unlike conventional oils, the synthetics clean out the crud and clean the lifters.
Are you sure it's the engine that's making the sound?
In your other thread, you state that your clutch is permanently disengaged.
Maybe you broke the flywheel off the crank?
Andy
PS: I think it's time to drop the engine and tranny and find out exactly what is going on ...
I still would say lifters because the sound goes away after it's warm. I'm also running Hydro's but I'm running synthetic, a higher pressure oil pump, and a special oil pressure relief valve that boosts the oil pressure, thus keeping the lifters pumped.
Even if they are hydros, it may be good in practice to adjust them anyways.
If you are having clutch issues though, drop the whole package and then try to diagnose it.
I'm not sure, but would a rod knock dissapear as the metals expand with heat?
then again, lifters clack, rods clank.
Could also be an exhaust leak. I know the difference now, but when I had an exaust leak (where the heat exchangers attach to the engine) the noise made me think something was wrong with the engine. As stated earlier, you need to get under there and find out where the noise is coming from. Make sure you tighten the bolts to spec! (or slightly less)
It has also been said that hydro lifters still need periodic adjustment despite advertisement to the contrary. Mine were within spec several years after an engine rebuild, but it's good to check them every so often just the same.
I think you need to have a PNW teener tuesday party ...buy beer and pizza and between use all we will figure it out ....and then tell you how much it will cost you .eat your pizza and leave you crying in your beer
I have hydros as well. Before the next oil change, throw some marvel mystery oil in it and get it hot. Fixed mine right up. Also, had a weird clanking noise when cold, ended up being the fan belt rubbing on the fan shroud. New belt, no noise.
PO had the engine built. The shop (since out of business) didn't Loctite or stake the cam gear bolts. One walked out and started to eat the oil pump. Tick, tick, tick, tick........
Harvey
Good luck, seems to be many others out there using hydro lifters than I thought.
Seems as though it was just a lifter. Brad ran some cleaner through there and then put some Brad Penn in and no more noise.
Powered by Invision Power Board (http://www.invisionboard.com)
© Invision Power Services (http://www.invisionpower.com)