lifter bleeding

[cmptrphreak]

thats funny. anyway i am in the procces of priming the lifters. Now I the vfaq It says after you submerged them In oil u turn them upside down and press the paperclip in and let all the oil come out, but when you do that the lifters are soft, like I can push the thing in with my finger. Is is supposed to be hard or loose. thanks I have 3g lifters

 

[Ravenous]

I never want to post wrong info so please wait for verification, but they should be "soft" as you put it. If they were stiff then you run the risk of damaging the cams/lifters/rockers... possibly valves...

 

[daren_p]

What are you doing, just replaceing or cleaning the lifters? If so then yes you want to compress them and bleed the oil out so they are soft. If you install them pumped up/hard you will be taking a chance of bending a valve. Upon start up you want to pull the engine fuse (not sure if its called that on the 1g's) and turn the engine over for about 10 seconds. Do this about 3 times to help prime the injectors. Upon startup they will more then likely be noisey as hell till they pump completely back up.

 

[steve]

In the factory overhaul manuals and the FSM for the 3000GT, which uses the same lash adjusters, they suggest using diesel fuel to prime the adjusters and install them while full. The diesel will bleed down under the pressure of the rocker during installation while still providing some startup lube. That's the method I used on both the GSX and the Stealth when I did them.

Steve

 

[topstreet]

I always flip them upside down, with the paper clip in, and pump them to get all of the old oil out. The only real reason to use a diesel fluid, or ATF or something like that is to help clean the carbon out of them.

After doing this correctly, they will be spungy... Put a little assembly lube in the bores and drop them in. VERY NOISEY at first. Drive the car and see how it is before getting worried about it.

 

[steve]

The only real reason to use a diesel fluid, or ATF or something like that is to help clean the carbon out of them.

Why then would the tell you to fill them with diesel with new adjusters? They also have you use it for testing the bleeddown.

Steve

 

[Defiant]

Why then would the tell you to fill them with diesel with new adjusters? They also have you use it for testing the bleeddown.

Are they shipped in any kind of preservative lube? You'd want that flushed out, although it seems to me engine oil should do the job about as well.

 

[steve]

Are they shipped in any kind of preservative lube? You'd want that flushed out, although it seems to me engine oil should do the job about as well.

I can't say how the OEM adjusters are shipped. The "3g" adjusters I received were oiled but empty.

I can only assume, not being a Mitsubishi engineer, the reason for using diesel over oil is not having to drain the them to avoid them being pumped up and damaging the valves.

The DSM FSM tells you to fill them with motor oil, pumping them up, and then drain them before installing. The FSM for the 3000GT and the FOM tells you to fill them with diesel fuel, get all the air out, and install them full. I did both cars this way and they didn't clatter on startup so one could assume that both procedures are acceptable.

Steve

 

[daren_p]

Haven't heard the "diesel fuel" method before. Was just wondering will diesel fuel compress as liquids don't usually compress very well? Also does diesel have any lubricating properties? I know when I cleaned mine I did the method I stated above & it worked perfect.

 

[Defiant]

Haven't heard the "diesel fuel" method before. Was just wondering will diesel fuel compress

No, but it'll leak past clearances meant for motor oil much more quickly- thereby adjusting lash more quickly.

as liquids don't usually compress very well?

Diesel's pretty much normal in that regard.

Also does diesel have any lubricating properties?

You bet. It has to keep Bosch injection pumps alive. One of the specs for which involves turning their cylinders upside down and timing with a stopwatch how many seconds it takes for the pistons to drop out as air leaks past them. Kind of fussy tolerances.
You've never gotten diesel on your hands? Oily as can be.

 

[steve]

No, but it'll leak past clearances meant for motor oil much more quickly- thereby adjusting lash more quickly. ... You've never gotten diesel on your hands? Oily as can be.

These are two qualities that make it great for priming the lash adjusters. You can pump them up removing all the air and they will quickly leak down when the rocker is installed while lubricating them until the oil pressure comes up and replaces the diesel.

Steve