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Service on diesel fule injectors

B

bcny

Member
Are diesel fuel injectors supposed to be removed and serviced? I asked two mechanics of older tractors they both said leave it alone. I will be dealing with injector pipe leaks and such if I touch them ('70's era). And replacement pipes are not as good as original. They say if it sounds right leave it alone. I hear this opinion a lot around here.
I worry about leaky injector drip causing trouble.
I have a Perkins 152 and Ford 3000.
 
the first thing is "BUY CLEAN FUEL KEEP IT CLEAN" as it says on a lot of old gas caps. keep fuel filters changed on time . they last a long time if cared for. there is signs to go buy also in the exhaust pipe, plus starting. should have a nice clean dry pipe basically. I stick my finger in and rub the inside and should not get much soot on finger. leaky injector will hammer like a rod brg. plus at idle should be no blue smoke at operating temp and smooth running. I have over 400,000 km on my Duramax and no engine work done to it and it runs as the day I bought it. could not say that about the Oldsmobile 350 gas engine that was converted to diesel though. injectors leaking and hammering was a problem on them that were still on warranty. it was a good engine converted to a poor diesel!
 
Listen to what they said. Do you ("service") the injectors in your car every time the oil is changed??? If your tractor starts running rough or takes a long time to run smooth after a cold start, then start worrying about the injectors.
Loren
 
If it ain't broke, don't fix it, at least as it applies to injectors.
That doesn't mean not to maintain them. Given the reduction in sulfer in the new fuel, you should be running a diesel additive to make up for it. I know the industry says it's not a problem, but the guys that have been doing pump work for Dad and me for over 30 years say that what they see come through their door tells them different.
 
The Perkins runs like a top, its sound is in harmony and constant.

The Ford sounds like a bucket of bolts, and it gives out soot. I had replaced the exhaust manifold. Lots of soot.
Infrared thermometer toy showed the #3 cylinder to be 10 degrees hotter at the exhaust port. Or so I remember.

After 43 and 45 years I can't imagine the injecton system system being pristine.

I guess I will leave it alone, feed it TechronD or some such potion.
 
3 cylinder tractor engines in general sound rough and noisey compared to 4 cyl. engines. As far as the soot, take the tractor out and work the he!! out of it for several hours. That may cure your perceived problems.
Loren
 
(quoted from post at 08:03:08 06/29/19) Listen to what they said. Do you ("service") the injectors in your car every time the oil is changed??? If your tractor starts running rough or takes a long time to run smooth after a cold start, then start worrying about the injectors.
Loren
Click to expand...

I did rebuild a 310 waukesha last winter, had a leaking rear crank seal ,.well one thing let to another so I ended up rebuilding that engine.(7000+ hrs)
This engine started very fast even after sitting all winter and ran like a charm all day long.
Among the things I did was pop testing the injectors, to my surprise only one of the six tested OK pressure wise..the other five where in really bad shape, some opened at only 1000 psi and had a really bad spray, others did not spray at all but just streamed from 1 or 2 holes and reached barely 500 psi before opening.None had that distinctive chatter. Standard is just under 3000 psi with a clear soft chatter.

Just saying.
 
Pull them out and have them tested if your worried diesel injection shops will test them pretty cheap . As far as the sulphur in the fuel removing the sulphur itself isn?t the problem but removing the sulphur also removes lubricant from the fuel and that does cause a problem
 
Guy over on the JD board just posted about a 2520 that burnt a piston from a bad injector.
Might be worth getting them tested. The Yanmar compact tractor engines recommend to check the valve lash and test the injectors every 500 hours.
 
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