Guest Anonymous Posted February 14, 2003 Share Posted February 14, 2003 Just wondering; I'm buying a 73 240z with 3 twin choke webers, the fuel tank was full when parked 15+ years ago. Anyone familiar with removing gas varnish from the fuel system ? No additives were in the tank. Any help would be great,I'm tring to decide if this is a job for me or a pro ? Ron E Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted February 14, 2003 Share Posted February 14, 2003 It's going to take some time and money. It's not that difficult and you will save yourself some money by doing it yourself. Start by getting a book on Webers. I have "Weber Carburetors" by Pat Bradley and it has help me many times. There are several including one a mechanic friend of mine uses from Chilton. First step is draining the tank and then pulling it out. Take it to a local radiator shop and have it put in the vat. This will clean your tank to get any varnish or rust that has developed on the inside. Should run you about $70.00 Order rebuild kits for the carbs. I got mine from Top End Performance. The 3 sets will run you about $100. After 15 years the carbs are varnished on the inside. You don't know what is stuck and you might do some damage if you try to turn the throttle shaft or open the chokes. Avoid the temptation to work the throttle and just pull the carbs. Rebuild one at a time and be very thurough on cleaning all the parts. Make sure the floats are set properly when you put the carbs back together. DCOE Webers are very straight forward and rebuilding them is not difficult. Only word of advice is to be careful when pulling the pin that holds the floats. The part of the housing that holds the pin is suseptable to breaking. While you have them apart make a note of what jets and venturi you have This info will help you with tuning later. Throw your old fuel pump and regulator away and buy a new ones. Replace all of the rubber fuel lines and breather hoses for the tank. Pour paint thinner into the steel lines while they are open and blow the thinner through with air. Reassemble everything and you should be ready for tuning. If you have tripple webers, a syncronizing tool is a must. J.C Whitney has a good flow through model for $30. It will be the best investment you will make in your carbs. I bought my 260z with virtually the same circumstances. You might try and cut some corners but in the end you will replace everything I mentioned. Learn from my experience and spend the money upfront and save yourself some time and headaches. Good luck and it will be worth it when your done. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted February 16, 2003 Share Posted February 16, 2003 BeastZ Great Help; It Has a Holly 7/psi/120gph fuel pump and a pro line regulator, is there anyway to save these and remove the varnish safely ? or am I only prolonging the inevitable ? What about the sending unit ? Ron E Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted February 22, 2003 Share Posted February 22, 2003 Hey Ron, Sorry for the delay, You may be able to get a rebuild kit for the reguator . If not I would replace it. You may be able to salvage the pump but at the very least it will have to be taken apart and cleaned. Start there and see where you are at. I also had a Holley pump but ended up having to replace it. You may be luckier. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.