fuel pump confusion

[98LarsonGM57]

I've got a 98 Larson w/ a 350 Volvo GS (holly carbs) - the fuel pump is singing like no tomarrow - so i want to change her out before she leaves me standed. <br /><br />Question - all the references I see point me to an 18-7330 to replace a 3857650 - it appears to be the only reference to a 350 but then says "engines with MPI"; My engine has a carb and the number on my existing pump reads 3850810 which cross references to an 18-7331...<br /><br />Which do I buy?<br /><br />Also - anything a novice should know before getting into this job? looks like an easy swap... am I naieve?<br /><br />Any help greatly apprecieated..

 

[Bondo]

Re: fuel pump confusion

Engines with MPI use HIGH Pressure pumps......<br /><br />You need a Carb. pump,... set to 6psi...... I'd say 18-7331

 

[98LarsonGM57]

Re: fuel pump confusion

Thanks Bondo - that would make sense as it would cross reference with what "appears" to be on there - I was just suprized not to see it "assiciated" w/ my engine on any of sites I searched.. it is always associated with the 454 and 502.. <br /><br />Anything I should know about before I take this thing loose? is fuel going to go everywhere?

 

[Bondo]

Re: fuel pump confusion

Well,....<br /><br />If there's Any Spillage, it Should be minimal.......<br /><br />Use 2 wrenches(that Fit Properly) on the fittings on the ends.... Don't want buggered up fittings.....<br />No Place for Vise-Grips.......<br /><br />Be gentle with the Ele. connector.....<br /><br />Good Luck.....

 

[Don S]

Re: fuel pump confusion

What is the model number of your engine? It should be something like 57GSXXXX. the X's will be 4 letters, need to know the 4 letters to find out which pump you need with a Volvo number, then you can cross it to a sierra number.

 

[98LarsonGM57]

Re: fuel pump confusion

I got my pump in today and plan to install it tomarrow night.. <br /><br />Should I put any kind for pipe tape/ locktite on the threads? <br /><br />Aside from some fitting wrenches, do I need to get any other supplies?<br /><br />Thanks in advance for your help<br /><br />Lee

 

[Don S]

Re: fuel pump confusion

No Teflon Tape Ever in a fuel system, causes way too much trouble.<br />All the fittings on your pump are Oring, put new ones on, or you have about a 75% chance of them leaking. The Volvo part number is 3850820. The hose is double flared and does not need any sealer

 

[98LarsonGM57]

Re: fuel pump confusion

Thanks Don - I'll stop by and pick it up this afternoon.

 

[98LarsonGM57]

Re: fuel pump confusion

I can't seem to cross reference ORing 3850820 anywhere locally - anyone know what size it is? Can I just pick one up at the local hardware store vs. ordering one from Volvo? seems crazy.. <br /><br />Thoughts?<br /><br />thanks again. <br /><br />Lee