Don Scott and others who might know

Jim Downard · #1 (**permalink**) 06-27-2002, 04:59 AM

Don,
I just got the 393w back together last Friday afternoon before the fling, but now have a few questions. I'm getting some oil on the front of the motor, and it appears to be coming out of my breather. (There's even a little oil on the under side of the hood just above the breather) I have a pcv valve and line running from the right valve cover to the carb. Everything worked fine on my old 351w but now I have this problem. Do you suppose that the pcv valve has just happened to go bad at this time or should I maybe ditch it in favor of an additional breather for the right side.
Also, I removed the vacume advance on my Duraspark II and set timing to 34 degrees total. It didn't appear to have much mechanical advance. I also rejetted my Edelbrock 750 cfm carb back to std. The engine is now running so hot that it is burning the jet hot coating on the headers. The hot spots feel like sandpaper now. The water temp doesn't go over 200-205 degrees but I can tell the exhaust temp is way up. I need someone to point me in a direction.

Thanks,

Jim Downard

Clois Harlan · #2 (**permalink**) 06-27-2002, 06:06 AM

A friend of my wifes son has just rebuilt his Mustang 302 and is having the same problem. Headers are glowing red hot but water temp is within tolerable range. Hopefully, someone can answer your questions and I can pass this info on. However, he upgraded his cam and injectors.

Good question.

Ron61 · #3 (**permalink**) 06-27-2002, 06:35 AM

Jim,
I am no expert on this problem but can tell you what a couple of people around here that I know found. The headers burning in spots were caused by unburned gas igniting in them. Their oil blow by was caused by using a breather with a pcv valve. I just use a pcv valve on the right valve cover and no breather on both my stroked Windsor, 416 CI, and on my 429 SJC. They both came that way and I have never had a single drop of oil show up. As for your edielbrock carb. I have no experience with them at all and others in the club can certainly give you a lot better advise. I do have a breather on the left hand valve cover that goes into the air cleaner and I have ran both these engines for years. The stroker is 5 years old and the 428 is 33 years old. Hope this will give you some ideas of what to look at.

Ron61

jerry rowley · #4 (**permalink**) 06-28-2002, 06:19 PM

I think you are getting way over 34 degrees advance somehow. The engine should not run that hot, water or exhaust. Recheck your distributer and the timing. Are you setting your timing at 3000 rpm with everything connected? You should with max advance of 36 degrees. See if this doesn't help the situation. The other thing that makes an engine run real hot is being extra lean. Are you sure that carb is working properly?

As far as the oil spill, I have a pcv valve on my right valve cover too. I also have a Moroso $50 screw on oil filler cap w/overflow line to a catch can on the left valve cover. That cured my problem of pukeing oil all over my stroked 427. I had a "push-on cap, breather" previously and it was a joke!
Jerry

Jim Downard · #5 (**permalink**) 07-01-2002, 08:30 AM

I guess I should state that when I unhooked the vacume advance, I merely capped off the vacume advance ports with rubber plugs. I marked the damper pulley at 34 degrees and set the timing just a hair under with the engine running at 3000 rpm. I currently have the carb set about 25% richer than std. in both cruise and power modes. With this carb setting, and the duraspark set at 12 degrees initial with the vacume advance hooked up (this was the way I had it before I had to tear the motor down due to improper balancing) I didn't have any water temp or exhaust temp problems. I should also note that my currentl water temps are high only it the city. On the freeway, it stays around 175 degrees. I have a 165 degree thermostat. I am going to hood up the vacume advance again and set total advance at about 32 degrees now, and set the carb back to about 16% richer than std. We'll see what this does.

Thanks for the input.

Jim Downard

jerry rowley · #6 (**permalink**) 07-01-2002, 01:56 PM

Jim,
It sounds OK except for some small thing. Did you "burp" the system throughly? You may still have a bit of air in the cooling system. I think what you are going to do sounds fine. Maybe burp it again and add a couple of "water wetter" bottles too.
Jerry

Jim Downard · #7 (**permalink**) 07-02-2002, 06:00 AM

Jerry,
The windsor motors have the small bleed hole next to the thermostat which generally bleeds the air out of the heads and intake. When I filled the system, it held 2 1/2 gallons of water. When it heats up, it pukes a little out to my recovery tank, but I never have to add more that 12-16 ounces to the system to top it off. Of course, when I do top it off, it pukes back out due to the expansion. I think if I get the motor to run cooler exhaust wise, the in town coolant temps should drop as well. I'm currently waiting for my alternator to come back from the shop, so maybe this weekend I can test my theories.

Jim Downard