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Post by yamanastic on Sept 4, 2021 17:32:48 GMT 1
I’ve rebuilt the engine on my 4L0 and filled the gearbox with oil but the oil is weeping out from the bolt and washer, I’ve tried new washers and a new bolt but it’s still weeping oil, what’s the best way to fix this? By the way I’m torquing the bolt and washer to 14ft-lb.
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Post by bare on Sept 4, 2021 17:37:08 GMT 1
Assuming there's no case crack.. Apply a bit of Oli suitable sealant to the bolt head... before fitting it.
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Post by yamanastic on Sept 4, 2021 17:55:20 GMT 1
Assuming there's no case crack.. Apply a bit of Oli suitable sealant to the bolt head... before fitting it. I’ll have to check and see if there’s a crack although I didn’t notice one before, can you recommend an oil suitable sealant. |
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Post by midlifecrisisrd on Sept 4, 2021 18:36:57 GMT 1
Try a dowty washer
Steve
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Post by yamanastic on Sept 4, 2021 23:14:21 GMT 1
I’ve never used one of them before, I’ll have to get some to try thanks Steve |
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Post by Tobyjugs on Sept 5, 2021 0:20:03 GMT 1
Have you inspected the landing surface on the engine case? this should be free from marks, if the dowty seal doesn't work your best bet is the advice from Bare. Try a loctite sealant like 542 or 570
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Post by rigga on Sept 5, 2021 7:18:52 GMT 1
Dowty washer is a combination of metal and rubber, work well, hopefully that will help your issue.
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Post by beardy on Sept 5, 2021 7:57:38 GMT 1
Can you even use a Dowty washer in a torqued bolt situation? Wouldn’t a copper or aluminium washer be a better bet?
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Post by dusty350 on Sept 5, 2021 9:10:15 GMT 1
Are you using genuine washers ? The surface the washer and bolt tighten onto is machined, so unless there is damage to that surface or a crack in the casing, it shouldn't cause issues. Are you sure there isn't oil leaking from somewhere else and collecting at that point - gear shaft seal, sprocket seal ? The genuine Yam washer is expensive - 137 15353 00 - superceded to 4F4 147 6600, and it's £8.50 !! You can get a Honda crush washer that is ali which works perfectly and is only 95p from Fowlers - 94109 14000 - it's what I use on my rebuilds with no leaks  Dusty  |
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Post by midlifecrisisrd on Sept 5, 2021 10:43:39 GMT 1
Can you even use a Dowty washer in a torqued bolt situation? Wouldn’t a copper or aluminium washer be a better bet? The dowty washer is usually made of alluminium with the the rubber seal moulded into it It will only squeeze the rubber till it meets the alloy so will torque fine They use them on GT750 head bolts to stop rain water getting in Steve |
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Post by beardy on Sept 5, 2021 15:24:14 GMT 1
I see. Thanks
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Post by yamanastic on Sept 5, 2021 21:05:10 GMT 1
Are you using genuine washers ? The surface the washer and bolt tighten onto is machined, so unless there is damage to that surface or a crack in the casing, it shouldn't cause issues. Are you sure there isn't oil leaking from somewhere else and collecting at that point - gear shaft seal, sprocket seal ? The genuine Yam washer is expensive - 137 15353 00 - superceded to 4F4 147 6600, and it's £8.50 !! You can get a Honda crush washer that is ali which works perfectly and is only 95p from Fowlers - 94109 14000 - it's what I use on my rebuilds with no leaks Dusty Dusty definitely no leaks from anywhere else, no cracks and the surface is good, not using genuine washer but it is a type of copper washer that I have used before. |
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Post by chrisg on Sept 5, 2021 21:54:41 GMT 1
Are you using genuine washers ? The surface the washer and bolt tighten onto is machined, so unless there is damage to that surface or a crack in the casing, it shouldn't cause issues. Are you sure there isn't oil leaking from somewhere else and collecting at that point - gear shaft seal, sprocket seal ? The genuine Yam washer is expensive - 137 15353 00 - superceded to 4F4 147 6600, and it's £8.50 !! You can get a Honda crush washer that is ali which works perfectly and is only 95p from Fowlers - 94109 14000 - it's what I use on my rebuilds with no leaks Dusty Dusty definitely no leaks from anywhere else, no cracks and the surface is good, not using genuine washer but it is a type of copper washer that I have used before. Copper can go hard (oo er misus) but can be annealed by heating up. |
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Post by dusty350 on Sept 6, 2021 7:00:12 GMT 1
For 95p and a bit of postage, I would give the ali Honda part a go Dusty |
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Post by shaunthe2nd on Sept 6, 2021 7:43:23 GMT 1
I've used the part recommended by Dusty ^^^^^^ a couple of times with good results. Cheap but effective.
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Post by LC_BOTT on Sept 6, 2021 8:44:37 GMT 1
Must be worth a look in Halfords? Seem to remember someone getting a sump kit a little while ago (washer and bolt) for around a fiver, might just be a bit quicker than waiting for post etc if needed in a hurry.
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Post by yamanastic on Sept 6, 2021 15:29:23 GMT 1
Dusty definitely no leaks from anywhere else, no cracks and the surface is good, not using genuine washer but it is a type of copper washer that I have used before. Copper can go hard (oo er misus) but can be annealed by heating up. They are new copper washers I’m using, I’d have thought they would be okay |
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Post by yamanastic on Sept 6, 2021 15:31:49 GMT 1
I’ve used a bit of sealant for now that seems to be working (thanks bare) but I’m going to get some of the 95p Honda washers and try them, thanks everyone for your help and advice
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Post by JonW on Sept 7, 2021 5:11:56 GMT 1
Always make sure youve removed the old one from the drain bolt... late night working in a shadow in the shed with a beer can lead to a drip from the bolt... er, or so im told... Ahem...
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