1f no compression looking for options (2 Viewers)

[cruisermatt]

pull the valve cover and give each rocker arm a smack with your orange Harbor freight deadblow hammer.
You probably have some stuck valves

 

[Skreddy]

If you have the means to do it, try blowing compressed air into each cylinder with it at top dead center (both valves closed). Doesn’t have to be much, I usually use 40-50 psi. This can help diagnose rings vs head issues. I try to do as much sleuthing as possible before taking stuff apart to guide me where to look.

 

[Dave54000]

pull the valve cover and give each rocker arm a smack with your orange Harbor freight deadblow hammer.
You probably have some stuck valves

I had one stuck valve freed it up the rest moving

 

[Dave54000]

If you have the means to do it, try blowing compressed air into each cylinder with it at top dead center (both valves closed). Doesn’t have to be much, I usually use 40-50 psi. This can help diagnose rings vs head issues. I try to do as much sleuthing as possible before taking stuff apart to guide me where to look.

Ok thanks

 

[Dave54000]

Removed head and cleaned in it up got all the valves to hold oil did not remove them all cylinders look pretty good installed new head gasket. so with a ice cold engine for leak down results I got 40 to 45 percent loss across the board in the moderate range all leaks seamed to be valve leaks. Should I put the pushrods back in and try to run a compression test or start it again I think the head gasket was the major problem but unsure if leak down results are decent enough to continue thanks

 

[charliemeyer007]

Valves holding oil is about meaningless especially with the spring installed. Holding back gasoline without the springs is a very good indicator that they will seal. You had the head off, you could have lapped the valves for almost free and done a good inspection at the same time.

 

[Dave54000]

Valves holding oil is about meaningless especially with the spring installed. Holding back gasoline without the springs is a very good indicator that they will seal. You had the head off, you could have lapped the valves for almost free and done a good inspection at the same time.

Ok thanks I could lap the valves when I remove the head again i am trying to get a idea if with block is worth getting a head reconditioned which I have no problem but just trying to not invest a lot of money and find out that engine needs rebuild and can't get parts

 

[Dave54000]

Started to do a more detailed leak down and had bad ring leak so I guess this engine will be shelfed for now thanks

 

[70fj40]

This is a great time to map out a direction with your 40. It sounds to me like you want to end up with an LS swap. If so and I were you I’d put my money there. I would definitely decide on the direction I wanted to go with it now.

 

[Steamer]

When I got my F.5 rig in late 99, I pulled the head and had friend of a friend do a cheapy going through and cleanup on it. While the head was off and to clean up the piston tops, I was one by one putting mineral spirits into each cylinder, scrubbing with a parts brush, and then sucking out the dirty juice with a turkey baster. When I got to # 3, the spirits wouldn’t puddle up. It just disappeared instantly. And the same occurred on several other cylinders. So, I pulled all the pistons & rods and when I did, lots of ring pieces fell out. The cylinders measured moderately over the limit, slightly out of round, and with a bit of a ridge on the thrust side. I was not in a position to pull the block and have it bored oversized and well basically, do a complete rebuild on it. So, I cleaned up the pistons, put on a set of standard size rings, honed the cylinders till the ridge was (almost) gone, left a nice cross hatch, put in a set of rod bearings since they were apart, and put it back together hoping I could buy some time till I figured out what to do. It’s an offroad only rig but that was 24 years ago, and I still have compression numbers in the high 140’s and low 150s.

Just sharing this as you may consider giving those cylinders a measure up and something like this might be and option to at least buy ya some time.

 

[Dave54000]

When I got my F.5 rig in late 99, I pulled the head and had friend of a friend do a cheapy going through and cleanup on it. While the head was off and to clean up the piston tops, I was one by one putting mineral spirits into each cylinder, scrubbing with a parts brush, and then sucking out the dirty juice with a turkey baster. When I got to # 3, the spirits wouldn’t puddle up. It just disappeared instantly. And the same occurred on several other cylinders. So, I pulled all the pistons & rods and when I did, lots of ring pieces fell out. The cylinders measured moderately over the limit, slightly out of round, and with a bit of a ridge on the thrust side. I was not in a position to pull the block and have it bored oversized and well basically, do a complete rebuild on it. So, I cleaned up the pistons, put on a set of standard size rings, honed the cylinders till the ridge was (almost) gone, left a nice cross hatch, put in a set of rod bearings since they were apart, and put it back together hoping I could buy some time till I figured out what to do. It’s an offroad only rig but that was 24 years ago, and I still have compression numbers in the high 140’s and low 150s.

Just sharing this as you may consider giving those cylinders a measure up and something like this might be and option to at least buy ya some time.

Thanks for info