i have the 3ks in my truck and want to go to the 4ks, pure diesel performance sells an up- grade spring kit to make your 3ks into 4ks-has anyone used this or should i just get a whole new 4k kit, the upgrade is only 30bux, also when i do the 60lbs valve springs can i just do the 6 or do i NEED to do all 12?

as for the timing, me and buddy just bumped it so that it ran alot better with the injectors but i want to set it for 16*, how would i go about fixing it right? i have the gauge set up you use on the barrel to set it right. can anyone telling me of a thread that already talked about this?

 

you need all twelve
TSB 18-10-94 Rev. A
here is a link to time it

 

never really understood why people would only install 6 springs and not all 12.

I have bought and installed the 3k to 4k kit, its just the two innersprings. very easy to install and well worth the 30 bucks.

 

The only reason you should install just the 6 exhaust springs is if you are running an exhaust brake on an other wise stock engine.

 

ok i will put all 12 in, should i replace any seals on the valve stems while im in there? or just leave them alone since they arent leaking?

 

I would just leave them alone

 

ok thanks for the link i have read it over a few a times and get a little confessed with it all but i will stuble my way thru it (wish i could find some lame man directions)
one question tho, do i need to set it back to stock timing and then tune to 16*? or can i just figure out much more it needs and advance it? also is there a chart somewhere with mm's to *s conversion for my 160hp pump?

 

Here's the link for the mm to *'s
Diesel Timing

 

thanks thats what i was looking for, i guess if i want to go more than 16* .1= .5*????

 

Based on that chart, I believe that's correct, but again without head studs it's not recommended advancing the timing beyond 16* I know that some people are running up to 17* without the studs, but it depends on what kind of a gambler you are. I'm currently at 16.5* Runs great, and the 4k springs are in, I'm not sure how much I'm loving them, may need to readjust the springs if I barely have any throttle on it jerks hard enough to send you into the steering wheel.