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(sorry guys can't seem to get video to upload)

Hi all

I took a video of the exhaust while the engine was warming up, as you can see a lot of white and blue smoke.I would appreciate any thoughts on what is causing this.The d7 is a 1960 mdl.The turbo fuel system has been replaced with a non turbo system(1958 and below).The engine does not smoke after warm up and ran at high rpm.The smoke always comes back soon after going back to low rpm. If the problem is to much fuel could it be hard on the engine?
I have a turbo system that i could install but not sure of what i would need to tweek such as timeing.She has plenty of power and seems to use some oil only when warming up.She likes to be pushed hard.I think that is the nature of the 17A.

the video---?

Thanks

Couldn't get your video/pics to come up....

I would suggest checking oit the fuel system part numbers and lifter specs etc, on many machines, a change of horsepower or change from N/A to turbocharging also means a change of fuel pump camshaft profile and/or lifter settings. Old Magnet may be able to find some reference to this in his literature collection.

Looks like oil smoke to me.....worn rings.

The 17A turbo change was at s/n 11879. In just roughly looking at the difference between NA and turbo, the series just before the change used the same injection pump camshaft and lifters so timing would be the same. Changes in the governor groups, governor spring, rack settings and torque spring along with a couple different turbo arrangements went along with the upgrade.

Pistons stayed the same at the change over until s/n 12066, rods stayed the same until s/n 13304.

I didn't look any further.

"Old wrote:

Couldn't get your video/pics to come up....

Hey Pete, my eyesight is shocking, is that a mermaid up in the top right corner of your scan? I just copied that chart for my folder, very good info there, thanks.
regards
Mike

Hi Mike,
Yah, I guess it is.....and a skeleton version phantom view in the chart too.
Don't know where I picked that one up but the info is good. Next one might be XXX rated. LOL

I have run into this problem several times on 17A's. Smoky exhaust on start up, that goes away when warmed up and under load, only to start smoking again when at idle.
Could be one of many problems, but if your engine is in fairly good shape, the most likely cause is fuel pump lifter setting. The lifter setting is actually individual cylinder timing, that will eventually go late due to wear on the camshaft and lifters.
For best results, the lifter setting should be done with the pump on the engine, to make up for any wear in the gear train.
DD

Sounds right to me, OM has come up with the figures and Dieseldoctor has hit the nail on the head, the lifter settings need to be adjusted at the timing marks on the flywheel to make up for any wear in the fuel pump drive train, camshaft and followers etc.

Thanks guys for the feedback


17A14193-turbo
17A15860-non


The entire fuel system and turbo charger was replaced with an earlier non turbo system .
I have a turbo charger with a matching fuel system that is in excellant condition.

My question
1.Is 12 to 14 hp worth the effort to switch
2.Is the timing the only thing i would need to check when installing the turbo system?

For the past two days I've been tunning up old smokey!!!!!! two cans of sea foam in 50 gal. of fuel and a good work out.
I think it's working

How old is the fuel in the tractor? When I purchase tractors, or run the ones I own that have been sitting a year or more, I don't get worried when I see smoke as pictured in your post. I run them putting a tank or two in fuel usage in them. They always seem to clear up. My d7's seem to slobber a bit when not worked in a while. After an hour or two of hard work they clear up. Good luck.-glen