Need Help

[koss007joe]

Hello , Im having some problems with my 74' Opel Manta. When i crank over the motor with out sparkplugs in it, turns over fine .. with the plugs in its much slower and sluggish . Iv replaced the Cap/Rotor wires plugs starter and new fuse block .. So Im going to take off the head and replace valves and springs . Where can i get a decent Rebuild kit ?? Hell for the Hole motor like every thing but cams and crank ??? Thats my Question ,,, Thats it cant half ass my Baby any more ..

[hrcollinsjr]

Originally Posted by koss007joe Hello , Im having some problems with my 74' Opel Manta. When i crank over the motor with out sparkplugs in it, turns over fine .. with the plugs in its much slower and sluggish ..

It could be a variety of things. The first thing that comes to mind is the cranking amps of the battery. Is it in good condition? Second, since the 50 series cars have tend to rust out at the battery box directly over the fuse panel there might be a problem there. The engine may still need to be rebuilt but that's a whole different issue. May sure your connections are good, the grounds especially. Heck, use a set of jumpers cables and go directly to the starter and see if it improves the cranking speed.

Harold

[Strider1970]

Sometimes a distributor cap is molded a little different. Or perhaps you put the wires on in the wrong place. When I last tuned my GT by ear I set the timing too far advanced and had a very similar issue, very slow crank.
It may be as simple as backing off the timing a little. I have decided, Opel starters, don't have a lot of power. Either way you look at it, the problem is the same, and is a simple fix. My motto is start with the simple stuff. Hope this helps.
Shawn

[koss007joe]

Originally Posted by Strider1970 Sometimes a distributor cap is molded a little different. Or perhaps you put the wires on in the wrong place. When I last tuned my GT by ear I set the timing too far advanced and had a very similar issue, very slow crank. It may be as simple as backing off the timing a little. I have decided, Opel starters, don't have a lot of power. Either way you look at it, the problem is the same, and is a simple fix. My motto is start with the simple stuff. Hope this helps. Shawn

I broke a 2 valve spring .. found it yesterday, both exhaust on 2&3, and the batt. is new and charged .. and the batt. box is all new metal .. But thanks I will back off the timming after i replace springs , Im trying to get this Car winter ready I ride motorcycles all summer long .. so the Opel sits all summer . Well is raining here and it time to Play Xbox

[hrcollinsjr]

Originally Posted by koss007joe I broke a 2 valve spring .. found it yesterday, both exhaust on 2&3, and the batt. is new and charged .. and the batt. box is all new metal ..

Just a little surprised at broken valve springs. I'm only use to seeing that on engines that have been run HARD and usually with more than standard lifts. Is your engine stock and how many miles do you think are on it. Have you done a compression test on it and results if you have?

Harold