Hyundai Repair Questions? Ask a Mechanic for Answers ASAP
compression on #4 is 55 and the rest about 125
cylinder misfires idle
it runs good at high ways speeds
its also odd that compression is 55 and when i do a leak down test theres no air coming out of the intake or exhaust
no leaks from anywhere
Hello, different expert here.
Do you have the head off now?
no i do not
Relist: Other. time
does the timing chain tensioner squirt up oil past the hood
Sorry, when you relist the question I am not notified of your response. It is an issue with the site.
You do not have a timing chain tensioner on this engine if this is the 1.6L gasoline engine so I do not understand your question about the oil squirting.
With 55 lbs of compression in #4 it is leaking. Whether you can hear the leakage or not is not really relevant to the problem, you could have a crack, the guide could be damaged or the seat on a valve damaged.
You will need to pull the head off to find the problem but before you do that pull the spark plugs and use a stiff piece of metal (I use the rail off a wiper blade) and measure the TDC position relative to the top of the spark plug well. If #4 is not lower than the rest then you need to pull the head.
Did you have the head done at a machine shop or did you install the valves yourself?
sorry i meant the jack chain tensioner.
i did the valve my self
The automatic tensioner should not have oil squirting out of it but if you have the valve cover and timing covers off you can remove the camshafts and recheck the leak down in #4. With the cams out all #4 valves should be closed. If you are still showing leakage check the coolant in the radiator to see if it is being pushed out (crack in block or head) and if nothing is showing there you will need to pull the head. I suspect you do have a valve leaking but just cannot hear it. If it were the exhaust it is a long way to the valve from the exhaust pipe with the muffler and the cat in between.
Let me know what I can do to help you with this