Distributor gear wearing out
07-30-2009 | 05:26 PM
#11
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From: Harrison Twp, Mi
You guys were right; it was just a matter of time. I put the new distributor in and it lasted about 5 minutes. RPMs dropped, motor stalled, started back up and she's knocking bad. Tomorrow the motor gets pulled and I'll go from there.
Also, tomorrow if anyone is interested PM me or check the classifieds here in the next few days I'm going back to a full stock 502. MI blower, aeromotive 1000 fuel set up and all are for sale.
Going with a fresh stock 502, 280 powerquest what should my speeds be...........cruising at 3800 and wot?
Also, tomorrow if anyone is interested PM me or check the classifieds here in the next few days I'm going back to a full stock 502. MI blower, aeromotive 1000 fuel set up and all are for sale.
Going with a fresh stock 502, 280 powerquest what should my speeds be...........cruising at 3800 and wot?
07-31-2009 | 06:23 AM
#12
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Joined: May 2004
Posts: 1,263
Likes: 21
From: Auburn, New York
Sounds like cam gear is damaged, as long as height of distributor gear is set correctly.
Does motor have stock intake ?
Have seen Procharged motors set up with no thermostats in coolant and/or oil systems that caused excessive ditributor gear wear. Oil temps stay very low, oil viscosity stays very high, oil pressures stay high at operating rpm's causing gear wear from driving oil pump shaft.
Just some thoughts, agree with others there is too much metal in that motor to survive long.
Does motor have stock intake ?
Have seen Procharged motors set up with no thermostats in coolant and/or oil systems that caused excessive ditributor gear wear. Oil temps stay very low, oil viscosity stays very high, oil pressures stay high at operating rpm's causing gear wear from driving oil pump shaft.
Just some thoughts, agree with others there is too much metal in that motor to survive long.
08-01-2009 | 11:42 PM
#13
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Joined: Jul 2008
Posts: 931
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From: Little River SC
I posted a couple weeks ago that I couldn't get the rpm's to get up on plane. After changing the plugs, wiring, coil, and checking the ecm, it ended up being the gear on my distributor was badly worn.
It's a 502 (with a procharger). The previous owner had passed away, so I don't know if the cam is stock or if anything else has been modified in the engine.
Well, I put 5 "easy" hours on the new distributor and the same symptoms are happening again. Today, I pulled the distributor and again it's badly worn......in only 5 hours!
The top of the gear is pretty rough, so my friend who pulled the distributor thinks when the new one was installed it was bottoming out.
From what can be seen the cam looks good. I know that's no guarantee that it is clean, but it looks clean. A harder gear will not fit the stock delco distributor. So, my choice is; buy a new MSD distributor that can accomodate a harder gear, buy another soft gear and hope that the other one was set wrong and this one lasts, or lastly; tear the engine down and check (and possibly replace) the cam.
I would like to buy the MSD distributor and harder gear, but I'm worried if I go that route and I have a stock cam (I think I do) will the harder gear screw up my cam?
This whole thing has been very frustrating. I've only had this boat since May, and what looked like a brand new boat for a great price has turned into a nightmare. I just want my problem fixed and let me enjoy my new toy. Any advice?
It's a 502 (with a procharger). The previous owner had passed away, so I don't know if the cam is stock or if anything else has been modified in the engine.
Well, I put 5 "easy" hours on the new distributor and the same symptoms are happening again. Today, I pulled the distributor and again it's badly worn......in only 5 hours!
The top of the gear is pretty rough, so my friend who pulled the distributor thinks when the new one was installed it was bottoming out.
From what can be seen the cam looks good. I know that's no guarantee that it is clean, but it looks clean. A harder gear will not fit the stock delco distributor. So, my choice is; buy a new MSD distributor that can accomodate a harder gear, buy another soft gear and hope that the other one was set wrong and this one lasts, or lastly; tear the engine down and check (and possibly replace) the cam.
I would like to buy the MSD distributor and harder gear, but I'm worried if I go that route and I have a stock cam (I think I do) will the harder gear screw up my cam?
This whole thing has been very frustrating. I've only had this boat since May, and what looked like a brand new boat for a great price has turned into a nightmare. I just want my problem fixed and let me enjoy my new toy. Any advice?
