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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Super 88 Diesel Head Gasket Leak - Need Advice

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Ed (KS)

10-04-2004 18:22:24




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When in direct sunlight, I can see several very tiny leaks in two places along the gasket opposite side of the injectors. There are tiny bubbles and diesel fuel seeps about an inch and a half before it evaporates. The engine is a little hard starting. I have to crank it about 15 second stints, three times to get it to fire off. There is quite abit of white smoke, which leads me to believe the compression is not too good. I planned to re-torque the headbolts, but an old tractor mechanic told me I could expect to break off one or two headbolts doing that. As long as it continues to start, is it worth the risk re-torqueing or should I just wait until it won't start or I get water in the oil? Thanks and regards! Ed

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Bobby C

10-04-2004 18:33:57




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 Re: Super 88 Diesel Head Gasket Leak - Need Advice in reply to Ed (KS), 10-04-2004 18:22:24  
I always re-torque the head bolts on all my rebuilds, gas or deisel after a few hours of use. If the head bolts and threaded holes were cleaned properly and your just torqueing to or near the manufactures torque specs, there should be no problem breaking off any of the head bolts. I torque my pullers with larger compression down an extra 20 or 30 lbs and have never had a problem.I think its deffinetly worth a try. Good luck with it anyways.

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J. Schwiebert

10-04-2004 19:42:36




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 Re: Super 88 Diesel Head Gasket Leak - Need Advice in reply to Bobby C, 10-04-2004 18:33:57  
Another trick you might try is to remove each head bolt one at a time, clean the threads , put a little oil on the threads and a film of oil between the cap screw head and the washer, there is a lot of friction there and then torque to a 117 except for the oil screw which is a 100 pounds. If you do not want to take then out break the bolt loose a quarter turn and then torque it. They have probably taken a "set' and this will also overcome the force of inertia. Questions. Yes whit e smoke is a compression problem. Probably a set of valve seats and the valve recession set to specs will help the problem.

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Ed (KS)

10-05-2004 15:05:56




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 The Basic Question for Mr. Schweibert in reply to J. Schwiebert, 10-04-2004 19:42:36  
You gave me several great ideas including how to tighten the headbolts and rework the valves to increase the compression. Do you recommend I do one or more of these things now or should I wait until it is more of a problem and I can't get it started or its smoking or leaking badly. I tend to want to hold off for awhile, but don't want my waiting to make the situation worse! Thanks for your advice! Regards! Ed

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J. Schwiebert

10-05-2004 18:31:26




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 Re: The Basic Question for Mr. Schweibert in reply to Ed (KS), 10-05-2004 15:05:56  
First of all I better clarify one thing. There are some Super 88 heads out there that CAN NOT have exhaust seats installed. Have you though of a leakdown test? Did you fix your governor seal?



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Ed (KS)

10-05-2004 20:32:42




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 Re: The Basic Question for Mr. Schweibert in reply to J. Schwiebert, 10-05-2004 18:31:26  
Mr. S., Thanks for you comments. No, I haven't considered a leak down test yet. I'm in no hurry yet. I'll be reading all the archives here and on the HPOCA sites to see what you and the other veterans say about headgaskets, smoke, compression, and starting. This evening I used the block heater for an hour before starting and it kicked off after only 10 seconds of cranking. Basically, for my use, I don't think its a serious problem as the old gal still starts without ether, it just takes a bit of cranking, and, I'm not working the tractor hard yet...maybe in a year or two. Surprised you remembered the governor seal. I got a seal for it, but haven't put it in yet because when I changed oil, the leaking slowed way down. I'll probably get the bearings as you suggested when I decide to change out the seal. Regards! Ed

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Geoffrey in KS

10-05-2004 15:59:58




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 Re: The Basic Question for Mr. Schweibert in reply to Ed (KS), 10-05-2004 15:05:56  
Ed,
I think the head work would be a good investment. If you have it done, take it to a good machine shop that has worked on something other than 350 Chevy heads. Some around here will grind the valves and seats at the wrong angle causing you even more trouble. I think the correct angle is 45 degrees. I hope J. Schwiebert will correct me if I'm wrong.



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Ed (KS)

10-05-2004 20:38:57




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 Re: The Basic Question for Mr. Schweibert in reply to Geoffrey in KS, 10-05-2004 15:59:58  
Hey Geoff! I'm sure I'll get the headwork done at some point, but don't feel its a major problem yet as long as I can still get it started. I was hoping for a quick fix that I might try before shelling out the bucks. You can bet when I do get it done, I'll be checking with all the local Oliver boys to get recommendations for a good machine shop. Whats the status of the Super 77? Take care! Ed

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Geoffrey in KS

10-06-2004 17:31:17




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 Re: The Basic Question for Mr. Schweibert in reply to Ed (KS), 10-05-2004 20:38:57  
I just got the center plate and haven't had a chance to put it together yet. Boy I can't wait until I do though! It's a lot more spunky than my 88.
Geoffrey



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