F1TwoThousand

F22C went with upgraded head build, installed new headgasket, reassembled and when the engine runs i hear this huge metallic whine sound. I figured/hoped it was a pulley so i ran the engine without a drivebelt and same sound. I installed a new oem timing chain tensioner, re installed cams and double checked my work(followef FSM to the T) unfortunately the sound still exists:






The way the whine comes to an end when engine is coming to a stop almost sounds like something sticking. Any ideas are highly appreciated.

flanders

Did you torque the cam caps in steps and in the correct order?

s2000sccaracer

Did you check for vacuum leaks? Try spinning the engine without spark plugs to see if you can hear the same noise? Remove valve cover to see if anything is rubbing.

Did you use assembly lube when installing the cams?

F1TwoThousand

Did not use assembly lube when installing cams. Service manual didnt call for that buti did oil them up with engine oil. It did sound like a vacuum leak for a second buy if you listen closely the sound sounds from something spinning and only happens when engine is running

F1TwoThousand

Ill take off and reinstall cams. The manual calls for 2 turns at a time when tightening. Also will make sure cams werent confused and switched

F1TwoThousand

Found the problem.


I didnt line up the cam chain with its proper lining mark. I just skipped this important step and aligned the cams with the cam gear. Thats why the engine ran fine but all that slack was what was making the noise!

flanders

How did you get slack in the chain?
It doesn't matter where those black chain links are as long as crank and cams are aligned.

F1TwoThousand

I had an engine whine first start up after headgasket replacement. I took off the crank pulley and cranked the engine to see if that was the whine thats where i completely got it out of timing. Now when i insert the crank pulley and the cam gear is TDC it shows the pulley to be on BDC. Engine whine was i believe due to not putting chain on as marked, that created more slack on the non adjustable timing guide side vs the adjustable side guide where the timing chain tensioner is.

F1TwoThousand

i got the chain on the cam gear properly now but the woodruff key wont go back into the engine. im trying to figure out if i need to hold the pulley and spin the cam gear to line them up

flanders

Wow you cranked the engine without the crank pulley and woodruff key installed?
Both oil pump and the lower chain drive gear would then spin free on the crank snout, dangerous stuff.