Wow...lots of good responses. I'll try to answer all the questions in one post, Elvis: 1. You're right, the gauge has a little release valve on the side, I was mistaken. I wonder if I can get a leak down test fitting. 2. I did the test -prior- to putting oil in the tops of the cylinders. I have not done it since because I wanted the stuff to soak in. I'll try it today if I can. 3. I still don't know why the engine cranks so hard, but I'll tell you this: It spins great with no plugs. It just seems to be fighting compression...as far as the noise, I put the first bit of marvel oil in there and spun the engine and it shut right up. No noise at all. Dave, Unfortunately, the oil pump is chain driven by the crank, not the cam. It has a priming hole, I believe and the manual states that if you take it off for overhaul, to prime it after you re-install it. I roger what you're saying about the lifters. I knew that didn't apply but at the time I didn't know how much compression I needed. With regards to the slow cranking, I asked before if too slow an rpm would prevent it from starting and many folks came back with a resounding "no, that shouldn't matter". I think it does matter. With regard to spark, I have spark on all 6 plugs, but now you're losing me, I only get one "spark" at regular intervals. Not "spark spark". Coil wiring cleaned and verified. I suspect I could have a stronger spark though, but I have nothing to compare it to right now. Keep 'em coming. --- In DMCForum@xxxxxxxxxxxxxxx, "Dave Stragand" <dave.stragand@xxxx> wrote: > For my DeSoto, the problem was more lack of oil pressure than lack of compression (due to the hydraulic lifters not pumping up, which is not applicable for a D). I worked on the compression when I could see nothing else below regular specs. The engine should start and run on as low as about 50 psi. It won't run well, but under no load should at least fire. > > If you're still experiencing a lack of oil pressure, this is something to look at. Mine comes up to at least about 40 psi (on a Midstate DMC sender), but I would think it would be at least 10-20 on any sender. Assuming you get the engine started due to some other reason, you will fry it in short order if you have no oil pressure, so definitely keep an eye on it. Having thinned-out oil trapped in the pump -could- cause this, as this type of pump requires the fluid it's pumping to be fairly viscous to work correctly. However, after cranking as much as you have, that should not be an issue. > > I'm forgetting exactly how the oil pump is driven, but I tend to remember it's off of the distributor, correct? If so, what you can do is put a "priming tool" on it and turn it that way. This is basically just a big screwdriver blade on a drill -- you turn the pump in the normal direction of rotation until the pressure comes up. It may not help start the car, but at least you'd know that your lubrication system is functioning correctly. > > You say you have a spark... but do you have all six sparks? Here's how to test: Unhook the coil wire at the cap and hook it to a spark plug clamped down to a ground on the engine. Use your remote starter, and observe the plug. Do you see "spark spark... spark spark... spark spark"? It should be slightly uneven due to the odd-fire engine. Also check that you have the + and - on the coil correctly hooked up (you'll get a weaker spark if not). > > This is a simple one to keep in mind... but when you're back there with the remote starter, you are leaving the key in the "on" position, right? It won't start otherwise... been there, done that. =) > > -Dave > ----- Original Message ----- > From: cruznmd > To: DMCForum@xxxxxxxxxxxxxxx > Sent: Sunday, August 03, 2003 8:52 PM > Subject: [DMCForum] Re: tone L.O.C. > > > --- In DMCForum@xxxxxxxxxxxxxxx, "Dave Stragand" <dave.stragand@xxxx> > wrote: > >The speed of the engine, whether you cranked it with all of the > >spark plugs out, and whether you had the throttle wide open will all > play a part in the reading. > > > > At 100 psi on closed throttle, all other plugs in, you're just fine. > > > > -Dave > > Ok, well as I've said, my engine isn't turning too fast and that > reduces the amount of volume so like the exhaust pressure, this may > have been somewhat reduced from the best it could be. > > I had all other plugs in, and closed throttle. The fuel was also > diabled so there was no fuel in the cylinder to take up space. > Afterwards, I realized that lack of fuel in the cylinder might also > slightly reduce pressure. > > -However-, Dave you said in your "DeSoto story" that you sent me, > that it took that engine 165 psi before it would run on it's own. I > realize we're looking at a world of difference in engines here, but I > didn't think 90-120 psi would be anywhere near enough. > > I also want to say that after putting some Marvel Mystery Oil in the > cylinders, and pulling the plugs, I spun the engine to work it in. > The engine cranked at -considerable- speed and yet I still have no > oil pressure. Could this be related? > > The oil pump worked perfectly when I tore the engine down, and I > didn't ever touch it. I never removed it, or it's chain or anything. > > It may have been totally drained since the oil was totally thinned > out by fuel. Would it have to be primed with oil? > > [Non-text portions of this message have been removed] Yahoo! Groups Sponsor ADVERTISEMENT <http://rd.yahoo.com/M=251812.3170658.4537139.1261774/D=egroupweb/S=170512 6215:HM/A=1693352/R=0/SIG=11tralmvc/*http://www.netflix.com/Default?mqso=6 0178293&partid=3170658> click here <http://us.adserver.yahoo.com/l?M=251812.3170658.4537139.1261774/D=egroupm ail/S=:HM/A=1693352/rand=476701219> To unsubscribe from this group, send an email to: DMCForum-unsubscribe@xxxxxxxxxxxxxxx Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service <http://docs.yahoo.com/info/terms/> .
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