ok I bought a 96 talon from my work it had come in because the spark plug in #1 dropped the electrode and stalled. well we found that the compression was 90PSI on #1 and 170 on the other 3. well I took the head off and found that the electrode did a number on the head and piston. no holes in the piston or scratches on the cylinder walls. so I had the head resurfaced and a valve job done. I replaced the head gasket and and timming belt. now that I have it back together I'm gettin 180psi on #2,3,4 cylinders but only 135 on #1. I read on alldata that the minimum compression is 100Psi and the max difference between compressions is 25%. the difference between #2,3,4 and #1 is 25% should this be okay to drive? I really wouldn't want to have to rebuild the bottom after I just did the top
2007-06-11 15:00:01 · 4 answers · asked by sk8trfred 2 in Cars & Transportation ➔ Maintenance & Repairs
do a leak down test to see where to leak is coming from. It could be the piston ring (most likely) or it could be ur values. too much carbon build up or its burnt, but this usually causes 0 compression.
2007-06-11 16:01:38 · answer #1 · answered by Walt 3 · 0⤊ 0⤋
i have to agree with the ring issue. the schrapnel in the cylinder may have damaged the piston to the point that the rings can not extend outward to make contact with the cylinder. going for a full rebuild may be the only choice.
2007-06-11 22:26:46 · answer #2 · answered by mdk68gto, ase certified m tech 7 · 0⤊ 1⤋
the ring r going on number one
2007-06-11 22:08:13 · answer #3 · answered by Anonymous · 0⤊ 1⤋
i suggest driving it and see if the check engine light comes on due to excessive fuel past the o2. if not i think your good..
2007-06-11 22:05:58 · answer #4 · answered by Craig V 2 · 0⤊ 1⤋