350, what test will report on the condition of the valve guides? I've been reading the latest leakdown test threads and learned the same you just said. Can they be checked for "play" while adjusting the valves or do the retainer and seals damper the valve too much to get a useful measure?

Tony

Yes, the valve spring is going to be your biggest enemy when trying to figure out what kind of shape your valve guides are in.

Removing the rocker and spring with the engine in the car is an option, but one that would require a lot of work.

I know one rule of thumb is that if you properly adjust the valves but still have noticible intermittent valvetrain noise that is an indicator of worn valve guides.

Another is that most air cooled engines will be due for a valve job between 80K and 120K even if it is treated well.

My problem after going 27230.
1. with euro 3.0 fuel distributor, couldn't get smooth idle.
2. in order to pass smog, installed 2.7 FD, smooth idle and
passed smog.
3. installed 3.0 FD again, still no good. Took out 2.7 heater
exhaust to put earlier exhausts and found #1 & #5 pitch
black compared to others being brown.
4. sent 3.0 FD for overhaul.
5. runs Very Smooth.

So, I think your FD is pumping too much fuel into that cyl.

Chris

scarebus, where did you have the FD rebuilt. That sounds like mine. The #2 plug is black while the others are light brown. Also I ran a compression test today. The #2 cylinder was 160psi while the others were 165, 160, 160, 160, 155. Seems pretty consistant. Pretty happy with these numbers. Put Techron in yesterday, ran it for about 35 min. Ran so poorly I brought it home. Has this partial trottle hesitation at low RPMs then kicks in at about 2500 RPM like it has a turbo, LOL. Tonite I ran it again for a about 1 hour. Started running better by the end of the ride! How long does it take to clean up the fuel injecters with Techron, if that is the problem? Right now I guess I am leaning toward a clogged or bad #2 fuel injector? Thanks Jerry

Jerry,
1. Make sure your injector on #2 is a good one. Swap fuel lines
to verify #2 cyl is getting excess fuel.
2. In my case, it was just running rough at idle, but everything
was normal at all power settings. Oc coarse this was attained
after playing with mixture controls.
3. If you have problem other than idle, play with fuel mixture and
idle air also. The high fuel flow into #2 will give rough idle, and if
you adjust mixtures to smooth it out, then the response for higher
rpm with load would be affected.
4. If smoke comes out at higher rpm, tweek down fuel mixture,
left turn, and give more air,left turn on air mixtue. Play with it.
5. FD over haul was done at: Fuel Injection Corporation, at
2407
Research Drive, Livermore, CA 94550. they have a
website: www.fuelinjectioncorp.com with e-mail address
injectec@aol.com talk to purchasing manager Daniel Toledo.
Tell him Chris from Chris' Auto in San Jose referred you. Might
get a break in price. Mail him the part, and he'll mail it back to you.
Good luck.
Chris

Take out the injector #1 and put into the place of the injector #2 and put the injector#2 in the place of the injector #1. Is the problem go to the cylinder with the injector one, the problem is a bad injector.:)

hello there

although we have different motors it seems we have similar problems and are getting similar suggestions from this board - FYI my post is here:

my post

does your fouled plug look like the one in my pic?

jevvy,

Follow Noah's step by step method and you should find the fault.

Jevvy, mine had fouled the number 2 spark plug also, and was running very poor on acceration from idle to about 2500 rpm. I did a techron treatment and cured the problem. Now I do a Techron treatment before every oil change. Seems to keep things running good so far. Jerry

Hi Jerry & others

Thanks for looking and making suggestions, sounds like there is pre-rebuild hope yet!

I have 1 question though:

Do you know of a UK equivilent to "Techron" as I cant seem to find that exact product over here? perhaps I should start a new thread to ask this.

I would love to think it is a stuck oil control ring or similar however I dont want to go lobbing (putting in) any old treatment

Thanks again for your help