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Old 08-07-2010, 04:18 PM
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my KARMA ran over my DOGMA

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I've got a few distributors kicking around actually. I'll swap this one out for another, and see if my readings change. It's entirely possible it's worn out, the 305 it came from had 250,000km. But it ran good, which is weird.
You can check some things before hand if you are going to do a swap, make sure that the bushings are not worn on the mech adv weights and floater plate under the rotor, springs can also lose there pull and dirt can impead movement, modules can be bad, shaft end play can be out, gear worn, vac can leaking etc etc.

I bought a compression tester. I'll give that a try today. I don't have a leakdown tester, but I did have the heads looked at by the machine shop. They said all valves but one sealed fine. The one had a slow leak. They recommended a complete valve job, but I couldn't drop an extra $1000 on it.
you don't need $1000 for this, must have been a cost to remove and reinstall heads, take them off yourself and pay about $400, bad valves/spings will cause your other efforts to vanish as wasted time. leak down checks and also a compression test...http://www.carcraft.com/techarticles...er/index1.html
I didn't degree the cam. I did verify the TDC mark with a dial gauge though.
things can still get out of wack here so look at this

Should I look into re-adjusting the valves?
see above link following these steps may save you a bunch of time and help you to get it right

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Old 08-08-2010, 03:53 PM
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I took the distributor apart down to its main components. Bushings are good, springs were swapped from a known low-km distributor. I cleaned everything up and lightly applied some grease. Shaft end play does have some slop to it, and looking online this is fairly common in these stock units. A

lthough not desirable I doubt its the cause for my concern, especially after what I learned during the compression test. More on that in a minute.

I re checked my initial and total timing, and found that the mechanical advance adds 20* by 3500ish rpm.

Compression test yielded results of 140-145 psi across the board EXCEPT for cylinder number 2. This guy was at a pathetic 95 psi. I poured a bit of oil in the cylinder and retested, now at 90 psi. Something tells me it's not the rings.

Since compression was good on the adjacent cylinder, it leads me to believe it's not a bad head gasket.

Next logical step is to re-adjust the valves using the method you linked. I'm crossing my fingers it's not a bad valve.

I checked the spark plugs and attached the image.

Cylinder one has some porcelain cracked off of it, probably from detonation while I was messing with the timing.

Cylinder two looks like all the rest, if only slightly less tan-coloured.

Cylinder three has some really weird deposits on it, although compression was good on this cylinder so I don't understand.

Cylinder seven has some pretty hefty oil deposits on one side. I'm not surprised at all that these valve seals leak oil.
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