SR has NO compression

[Movingviolation240]

I think a lot of you heard about my busted rocker arm due to a missed shift. I replaced that today, and the car wouldn't start. It poped once and that was all I got out of it. I pulled the valve cover back off and checked the timing marks (motor on TDC and dowel pins on the cams at 10 and 12 o'clock). I tried again and it turnned over kinda slow. I checked the timing again and turnned it over by hand to check the valve/rocker/spring opperation. Then I hit the starter again and it didn't sound like it had any compression.

So I pulled the cams back out and re-aligned everything and tried it again. No compression, not even a little bit, in all 4 cylinders.

I tried a compression gauge, nothingI tried to turn it over by hand and listen for blowby through an open valve, nothingI cranked it and listened for air escaping from the intake manifold through the throttle body, nothing

The really strange part is that after I broke the rocker I was about 60 miles from home. So I drove it home... it ran fine, idled a little bit high and was a bit rough. I even stoped for gas and looked the car over for a few min. After I was done it started right up.

So my question is what happened? If it was bent valves (in all 4 cylinders) why did it run so nice before, and if it was a blown HG why isn't there any oil in the water or water in the oil?

I also checked and the pistons to see if they were still there heh

I can turn the motor over by hand pretty freely (it feels a bit stiff for having no compression)

The rocker that broke was the number 2 one on the intake side (it just fell out of the way and didn't tear anything else up in the head).

I guess that's about it, if you need more info let me know, and if you have any ideas let me know. I'm gonna try to pump air into the cylinders tomorrow and see what happens.

[Hijacker]

i'm gonna relay that to my local SR guru and see what he thinks of it. Post his reply tomorrow afternoon.

[yellow_jacket]

The only thing I can think of is that you got the cam positions backwards(12 and 10 instead of 10 and 12 or vice versa) and bent the valves when tried to start it. Did you turn it over by hand after bolting everything back up(before hitting the starter)?

This is definetely a very odd problem. My initial guess was you left the spark plugs out. But you said you used a gauge to check compression.

[ItzGenX]

When I did some extensive work on my SR, I found that my chain did not have any marks on them at all. What I did was put my motor at TDC. Then from there, my intake cam's dowel pin at 12 o' clock, and the exhaust pin at about 1:30. As long as the intake cam is at 12 compared to the rest of the motor (remember it lays slanted a bit) and 20 roller pins in between the intake and exhaust timing marks. Be sure to pull any slack out of the right side of the chain when you do this. I don't remember anything at 10 o' clock.

[Movingviolation240]

I went out this morning and turnned it over by hand and it had compression. I put a little bit of gear oil into the cylinders to help it out, put it back together, and it lit right off.

I have no clue what happened, but it wouldn't do anything lastnight and today it works fine.

I'll just chalk this one up to divine intervention, because I can't think of any other way this would have worked.

"the power of prayer"

I'm about to drive to work so I guess I'll test it out and let you all know how it runs. It's smoking a bit right now, but I think the oil I put in there could have somthin to do with that.

Paul

[912.0turbo]

:oy: :crazy

[Hijacker]

a drop of oil smokes a long way...

at least she's running again. good luck, paul!