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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Super 88 Oliver

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Shaun Murray

06-29-2005 05:38:12




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I have another question concerning the engine assembly on my Super 88 Diesel. I had a old timer tell me to put a little RTV gasket silicone on my head bolts. I assume this would displace any moisture that may be in the hole. Is this necessary if everything is being done is a shop?

Any other suggestions for me as this things is going back together next week. (My Vacation) I will post pictures at completion.

Thanks in advance

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Texas Denny

06-29-2005 07:32:18




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 Re: Super 88 Oliver in reply to Shaun Murray, 06-29-2005 05:38:12  
I'm not in the habit of disagreeing with anyone. However, I see no reason to put RTV on the headbolts. And I see a couple of reasons not to do it. One, the torque specs on headbolts are given for very lightly oiled bolt threads. If you have rtv on the threads, how much will that affect the the stress that you put on the bolts? A particular torque will put a particular tension on the bolt which will provide the correct surface pressure on the head gasket. Two, when the RTV is on the bolts, will it affect the bolt to loosen? I sure don't know and I wouldn't want to run that test with my tractor. Three, could the RTV carbonize and sieze after extended use. And if it did this, could the bolts be removed without breaking? I wouldn't do this experiment with my tractor.

I've taken a lot of heads off tractors. I've never seen RTV on any of them. Your seal is the head gasket.

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old

06-29-2005 08:24:12




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 Re: Super 88 Oliver in reply to Texas Denny, 06-29-2005 07:32:18  
Texas, just for your info, the RTV silacone works good for lock tight, plus it doesn't seze like lock tight does. As far as on head bolts the only reason I have ever used it on them is when the head bolt would go in to a water passage and then it helps keep them from leaking. Just figured I let you know how well it works as a lock tight. Also make it easy to remove the bolt later.



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