compression rings/HJ60

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Winslow

10 Year 15 Year 20 Year
Joined
Sep 28, 2004
Threads
49
Messages
312
Location
Jackson Hole, Wyoming
Website
www.longestroad.com
Looks like the compression rings in the HJ60 are starting to go in a couple of pistons. Cold start has tons of white smoke for 60 secs, with rough idle. Once warm only a little black smoke under load. No oil consumption or poor perfromance. Smooth idle after running for a couple of minutes. Truck has new injectors, glow plugs, manual relay, etc. Further inspection of PCV valve also shows blow-by supporting compression ring theory. Should I replace the rings, rebuild, or what?

Can I drop the oil pan and crank, pull the pistons, and replace just the rings? This would seem easier than rebuild/pulling engne etc. Would I need to replace the crank bearings when I reassemable?

Thanks for the heads up. I would like to turbo this vehical and am planning on driving it to central america within the next six months. Engine has 491,000 on it and was "rebuild" by PO at 350,000.

I have the FSM and couple of good wrenches.
Thanks,
Winslow
 
My mechanic thought that it was probably not worth messin with. He said that many industrial diesels smoke like that on start-up and continue to run for many many years of reliable service.
 
"Word" on the comp test, just what I was thinking. If I find a low piston I'll drop in some oil to see if i can isolate ring vs. valve. Its pretty hard to find someone with a diesel metric comp tester, at least in my neck of the woods. Drrrrrrrr.
 
you can get a diesel compression tester at Harbor Freight for around $100, if I recall. Napa also has 'em for something like $100 or $150. Which is a lot.... but is a lot cheaper than an unnecessary motor rebuild.
 
Hey Winslow, this is way off topic but I was wondering how your HJ does over Teton pass? I was in Jackson last September with my HJ auto and I must say that is the steepest paved pass I've seen in the rockies! At one point I had to shift down to 1st gear as well as pulling over occasionally to cool down.....

A little embarrassing considering the amount of black smoke I was spewing out as well!

Beautiful country you have there!
 
Yup- teton pass kinda makes me feel like a character from one of the those CW McCall songs in the 70s. My HJ requires 2nd gear, 11-12mph, flashers, and enough smoke to thing someone was burning an oil field. The wife's S4 does a little better.

I am ordering a comp tester. Will post results next week on this thread.
 
If you feel your angien need a rebuild do a comp test .. but if this engine get a proper rebuild at 350,000 km .. to get a new rebuild maybe others 350,000 but it depends all in care and maintenance ..

Mine do it well until to 447,000 km ..

More than that, rebuild means IMOP head comp test also .. so more $$$$
 
Thanks Tapage! I need to get it running for my trip to Panama!! I hope to come down this winter. The diesel comp tester on ebay has no "buy it now" option, so I will be waiting probably two weeks for the compression test number. After that I will look into the condition of the valves/leak test. I sure hope all is well, I would love to put my money towards a turbo instead of grinding valves and rings- but first things first!
 
After my rebuild ( 2H ) my engine get about 50 - 60,000 km .. I turboed and drive it .. actually 14 PSI are my max boost ..

Anycase are not the same thing do it to run around the contry than a long trip as your plans ..
 
If you take the oil filler cap off while the motor is running it will give you an indication if the blowback past the rings if they not good also increase the revs. Look under the cap when it is off and see what is collected there usually black gunk, sometimes people find this has a creamy yellowish brown when they have a cracked head or faulty head gasket. Get the compression test done then you know exactly. There are a heap of shops on USA Ebay that sell B.I.N. and testers coming up daily, I have bought two from US Ebay myself. cheers
 
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