Hi All,
So, I'm planning on removing my engine head and getting a refresh done. I decided to do a leakdown test and a compression test before pulling it. My results were kind of shocking:
Cylinder 1 = 25% Leakdown, 200 compression
Cylinder 2 = 28% Leakdown, 200 compression
Cylinder 3 = 8% Leakdown, 200 compression
Cylinder 4 = 39% Leakdown, 200 compression
I read up religiously on how to do the leakdown test properly for several days before actually doing it last night. I bought the Longacre tester, made sure I was at TDC on the compression stroke, made sure the engine was hot, etc. I each case, I had a major leak coming out of the intake side....major hissing coming out of that side. I did not detect any noticeable air coming out of the oil dipstick hole or the exhaust side.
These results were shocking to me because this engine makes ok power for being a bone stock 1.6L 105k motor that's never been touched (dyno run @ 117 hp last year).
I am planning to pull the head anyway, so based on where I was hearing the leaks I'm guessing the intake valves are not seating very well.
I have a couple of questions:
1) I had all of the plugs out as I did each cylinder. Should I leave the other plugs in as I do each cylinder? Not sure if this makes any difference.
2) Is it possible to make decent hp with these kind of leakdown numbers? I would think not.
Any insight you guys can share would be great.
Thanks!!