Valve Cover Gasket - Page 2 - Honda Rebel Forum
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post #11 of 23 Old 12-02-2019, 04:21 PM
 
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What I pictured is different from what you (OP) pictured.


The stuff in a tube you pictured is silicone gasket maker. Like window caulking.
That stuff will work if you use a thin film and allow drying time. Think 15-30 minutes or so.



The High Tack product I pictured is more like an adhesive spray. Spray it on the metal and then stick the gasket on. It drys rapidly and holds gaskets very good.

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post #12 of 23 Old 12-02-2019, 05:42 PM Thread Starter
 
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Quote:
Originally Posted by SoakedKarma View Post
sounds like the gasket has dried up and shrunk or is non oem
i'd try sticking in a shallow pan of brake fluid to swell the rubber up a bit..
my 33 year old valve cover gasket is very flexible and drops into grove easily

I am having this issue with a brand new OEM gasket, an aftermarket gasket, and the original gasket that was stuck on there too and none of them will readily fit in, they are all ready to bounce out so i'm not sure that'd work. I'm running a chinese clone engine on the bike so although the design is the same, some things are different to the Rebel/Nighthawk OEM.. but not the area i am working on.
Quote:
Originally Posted by deere245 View Post
What I pictured is different from what you (OP) pictured.


The stuff in a tube you pictured is silicone gasket maker. Like window caulking.
That stuff will work if you use a thin film and allow drying time. Think 15-30 minutes or so.



The High Tack product I pictured is more like an adhesive spray. Spray it on the metal and then stick the gasket on. It drys rapidly and holds gaskets very good.
Ah I see what you mean now, this product is available here (UK) but I'll still have to glue half the gasket on first before trying the rest, i'm gonna have to leave that to dry & set for 24hrs before trying to tug the rest of the gasket into place.
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post #13 of 23 Old 12-03-2019, 12:42 PM
 
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Quote:
Originally Posted by Lordracula View Post
.... I'm running a chinese clone engine on the bike so although the design is the same, some things are different to the Rebel/Nighthawk OEM.. but not the area i am working on....
I’d be very surprised if Honda’s oem gasket would fit a chinese clone engine. It may be similar, but different enough to cause this problem.

Do you know for certain that the original gasket that was there when you removed the valve cover was the china-clone oem gasket?

It may well be that it was replaced by someone previously who shoe-horned a Honda gasket into place. It could be that none of the gaskets you’re trying are the correct gasket for a china-clone engine.

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post #14 of 23 Old 12-03-2019, 01:39 PM
 
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I work on Honda GX390 small engines and those clone parts fit perfectly. We use the clone carbs and even side covers all the time.



Most of those clones are "identical" just lower quality control.

From what I read, the Chinese cloned a first gen Australian Rebel. That is where most of the parts differences seem to come from. Australian bikes used dual carbs etc..


Maybe the original poster can post a few photos to give us a better idea of what is going on.


Another choice is to use a 3/16 bead of the silicone gasket maker. Let it set up and install the valve cover without the factory gasket. Machined aluminum on machined aluminum will seal fine with just the silicone. Especially in a non pressurized situation.

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post #15 of 23 Old 12-03-2019, 04:40 PM
 
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cut gasket in half on back side, place in cover grove, fill gap with silicone
let it sit a few days to cure before installation.
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post #16 of 23 Old 12-04-2019, 09:26 AM
 
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Quote:
Originally Posted by deere245 View Post
I work on Honda GX390 small engines and those clone parts fit perfectly. We use the clone carbs and even side covers all the time.



Most of those clones are "identical" just lower quality control. ....
He doesn’t have a Honda engine that he is using aftermarket parts on. He has an entire aftermarket replacement engine.

Despite the “clone” label (a euphemism for “pirated”), more often than not these aftermarket engines have many different specs and parts. I’m only suggesting the possibility that the gasket he is using is not correct for this particular non-Honda engine.

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post #17 of 23 Old 12-04-2019, 02:15 PM Thread Starter
 
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Originally Posted by VAReb View Post
He doesn’t have a Honda engine that he is using aftermarket parts on. He has an entire aftermarket replacement engine.

Despite the “clone” label (a euphemism for “pirated”), more often than not these aftermarket engines have many different specs and parts. I’m only suggesting the possibility that the gasket he is using is not correct for this particular non-Honda engine.
Correct in some ways, in the UK the more recent Rebel clone engines by AJS (the biggest china bike importer) from say, 2010-2011 onwards have a bunch of deviant features such as a water-cooling system and a balance shaft. They are better in function than any Rebel engine to be honest apart from being outrageously weak and badly made (125cc, 10bhp at 9,000rpm).

I got lucky in that my own engine is an early import from between 2006-2009 which doesn't deviate much from the original Rebel design apart from the fitting of covers and so on. It really is a clone. The castings are a disaster though, they don't look like they've been machined properly on the inside.

Here's a few photos of the situation currently, engine pic with decorative cover removed, and the valve cover gasket off and on. As you can see, not quite marrying up with the groove hence my plan to glue it with industrial stuff.
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File Type: jpg IMG_20191128_151355.jpg (347.1 KB, 2 views)
File Type: jpg IMG_20191203_192705.jpg (255.3 KB, 1 views)
File Type: jpg IMG_20191203_192827.jpg (261.3 KB, 6 views)
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post #18 of 23 Old 12-08-2019, 09:28 AM Thread Starter
 
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Hello again gents, pleased to announce that my plan worked! I used a line of high temp gasket maker in the cover groove, then I gently placed the rubber gasket in the straight areas of the groove. I let it sit for a minute or two and then applied gasket maker to that curve you see at the top there, then pressed the last part of the gasket in and held it there. First time in a while that I felt clever as it took no more than 5 minutes to get the whole gasket fitted snug to the groove.

I haven't run it yet because I want to leave the gasket to dry for 48hrs before I go jiggling it around the frame & engine and possibly wasting my time or causing another leak. I'm confident this will be airtight though as the purpose of that groove is to provide a seat for the gasket, which can then be squeezed by the cover bolts to seal off the valves for good, now I've fixed my threads and gotten that gasket seated, there should be no further hiccups.

I'll definitely be using that gasket maker again for helping my gaskets adhere to surfaces, it seems popular on the YouTube to use it alone but I'd rather get it done the right way. Hope this thread helps someone, thank you everybody! I might post an update after a while.
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post #19 of 23 Old 12-08-2019, 10:23 AM
 
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Looks good
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post #20 of 23 Old 12-08-2019, 01:34 PM
 
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a lot of curvature in your clone's cover that Honda Rebel cover doesn't have
side indentations not existent on yours as well not surprised you had problem
Glad it worked out for you..
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File Type: jpg 2ndGen02.jpg (133.5 KB, 3 views)
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