i was wondering if theres a way to dissolve that carbon buildup while the engine is sitting in my garage?

b16 it has alot of buildup on exhaust valves and i rather not take everything off cuz then id have to get new headgasket etc and dont want to do that.

heres how they are now

 

Install the engine and SeaFoam ... http://www.seafoamsales.com/94

 

seafoam webpage says it cleans intake side they dont mention anything about the exhaust side valves.

can i spray the seafoam cleaner in it while its sitting or does it need heat o work?

 

Any degreaser, brake cleaner, etc will work. If the build up is particularly stubborn, you may have to soak the valves.

 

are the exhaust valve stems coated with anything can i use brass wheel to get it off if i do take them out?

now that i think about it im gonna do the headgasket anyway

 

this is what i just done when i rebuilt me motor pull the valves out put them in order in a piece of cardboard so you dont put them back in the same place, use the wire wheel side of a bench grinder but use light pressure not so scar them and dont go in the section where the valve guide runs or you can damage the valve and guide.

 

I don't think a wire wheel would be the best solution for cleaning valves. They do slide in guides and need to be completely smooth. Heavy de-greaser and soaking and a firm bristled brush.

 

thats y i specifically said not to go on the section of the valves where it slides on the valve guide, i have recently done this on the car im driving now and it runs perfect no leaks no noises no problems related to valves.

 

well theres no deposits on the moving part obviously cuz it moves...

anyone have a suggestion where those heavy deposits might have come from.

i never seen that much

 

Looks like oil.

 

piston rings or valve seals is there a way to tell the difference?

 

Exhaust valve seals are most susceptible to heat, if they are old they will become brittle and allow small amount of oil to be sucked past during times of high vacuum, thus being pulled onto the valves and burning onto them.

 

so then bad piston rings the buildup would be all over the exhaust ports not just valves correct?

 

On a B series, valve stems seals are almost guaranteed to be the culprit... Otherwise the edges of the pistons will show some "washing" if the oil is coming from there.

 

nice.thanks dc5.
i probably gonna be taking the head off and valves out anyway to put the valve springs and cams in.

 

Why not just hot tank them?

 

cuz its washington hot tanks are cold here lol

 

Lol but seriously you can make one yourself fairly cheap. Battery tender, chicken wire fence stuff, plastic bin, distilled water and baking soda... BAM everything is clean!

 

cuz im moving in a month im not gonna set up a frikkin machine shop in my garage now.


has anyone used the valve master tool?

im thinking of getting it

 

Back in the day I've stuck valves in a drill press and cleaned them with a 3M scotch brite pad. If your just trying to get by...

Truth is, if your valves have that amount of deposits on them it's going to need to come off, valve seals can be changed with the head on but I suggest checking the valve to guide clearance as well. IMHO unless your trying to do this super budget, finding a new or even a good used set of valves will save you a lot of work/headache.

 

Have you actually tried this? Seems like your missing an important part of the instructions, if your trying to explain what I think you are.

 

Bad idea, if the motor is higher-mileage say bye-bye to your rings. I have personal experience with this, as well as the backing of many others online.

 

i used brake cleaner.worked great

 

Sde you have any links to support that? Ive used it 3 times on my car with no problem.
Tested the compression after about 4-5 years did not change.
It will break loose the carbon deposits if you have alot it will lower compression .
Or might open up some scuffs in the rings which were covered up by carbon deposits

 

https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/guaranteed-way-increase-your-horsepower-10-minutes-seafoam-1502112/

This guy originally did a DIY writeup on how to seafoam a motor...comes back 2 years later and edits his post saying it ruined his motor.

I had a 130k mile healthy D15B2, I ran 1/3 bottle through the brake booster. A month later, the car burned a ton of oil and smoked blue like no other. Ended up re-ringing it and fixed the problem