Serj22
Well-Known Member
So, I'm trying to get my 225 running again - well, it does run, but on 4 cylinders. I was done fooling around with it and trying to make it run, which was poorly. I believe I bought the car running on 5 cylinders and it's been that way for about 6k miles... I know. I bvelieved it to be a miss at idle, and I think all that it was was that when the car was at a higher RPM, the misfire was un-noticable. It was however - very noticable at idle. The whole car rocked.
Anyway, did a compression test, and if cylinder 1 is closest to the grill, it was this:
1. 130ish
2. 130ish
3. 60-70
4. 120ish
5. 20-25
6. 130ish
I asked a few people, and they suggested a valve seat came out, or the valves burned on those two cylinders. I pulled the valve cover off, undid the manifolds and alternator etc... and pulled the head (all within an hour. Love it)
I flipped the head over and set it on the fender. The head looks like it's been recently resurfaced, and the gasket is perfectly in tact. I lifted all the pushrods out before this, and had 12, but did not realize one of them was only half a rod, and broken.
The other side of the rod was down in the space above the lifters, and the lifter was pushed 3/4 of the way out of the hole. The lifter in question was on cylinder 4 closest to the firewall - not sure if that's intake or exhaust, but cylinder 4 fired, and the two on either side did not...
I turned the crank and felt the inside of each cylinder. They have not been honed recently as far as I can tell - no visible cross-hatching but the head looks completely rebuilt and newer.
My dad then sprayed WD40 into each cylinder top and filled the space with it, and in none of them did a single bit of WD40 leak through the valves. The valves also do not look bad, and I'm guessing are seated appropriately.
Could this be a problem with the rocker arm assembly? Or what? My dad suggested replacing the rod, and buying a new gasket set, then reassembling. I do not really want to put it back together though if the problem is not fixed. I do not see how a broken arm on 4, caused 3 and 5 to not have compression. Is there something I'm not seeing? If you need pictures I can take them. It's staying unassembled till I can get a rod and a gasket set. Maybe someone here has them? Cylinder 2 had some metallic bits on the top of piston and in the cylinder head - but was operational.
Anyway, did a compression test, and if cylinder 1 is closest to the grill, it was this:
1. 130ish
2. 130ish
3. 60-70
4. 120ish
5. 20-25
6. 130ish
I asked a few people, and they suggested a valve seat came out, or the valves burned on those two cylinders. I pulled the valve cover off, undid the manifolds and alternator etc... and pulled the head (all within an hour. Love it)
I flipped the head over and set it on the fender. The head looks like it's been recently resurfaced, and the gasket is perfectly in tact. I lifted all the pushrods out before this, and had 12, but did not realize one of them was only half a rod, and broken.
The other side of the rod was down in the space above the lifters, and the lifter was pushed 3/4 of the way out of the hole. The lifter in question was on cylinder 4 closest to the firewall - not sure if that's intake or exhaust, but cylinder 4 fired, and the two on either side did not...
I turned the crank and felt the inside of each cylinder. They have not been honed recently as far as I can tell - no visible cross-hatching but the head looks completely rebuilt and newer.
My dad then sprayed WD40 into each cylinder top and filled the space with it, and in none of them did a single bit of WD40 leak through the valves. The valves also do not look bad, and I'm guessing are seated appropriately.
Could this be a problem with the rocker arm assembly? Or what? My dad suggested replacing the rod, and buying a new gasket set, then reassembling. I do not really want to put it back together though if the problem is not fixed. I do not see how a broken arm on 4, caused 3 and 5 to not have compression. Is there something I'm not seeing? If you need pictures I can take them. It's staying unassembled till I can get a rod and a gasket set. Maybe someone here has them? Cylinder 2 had some metallic bits on the top of piston and in the cylinder head - but was operational.
