I removed the top end on my Triumph last night and installed a new gasket set to get rid of a nasty oil leak I had. After I got it back together it leaked even worse. Now people are suggesting that I use a silicone sealant in addition to the o-ring provided.

Can anyone suggest a high heat, oil resistant silicone? I was just going to go to Advance Auto and ask.

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'85 300SD (formerly california emissions)
'08 Chevy Tahoe
'93 Ducati 900 SS
'79 Kawasaki KZ 650
'86 Kawasaki KX 250
'88 Kawasaki KDX200
'71 Hodaka Ace 100
'72 Triumph T100R

I've found that using silicone sealant on gaskets or o-rings is a bad idea. The extra sealant makes it easy for any pressure to spit the gasket out. RTV should only be used alone, not as a gasket sealant.

I would not use any sealer on an oring. You need to inspect the oring groove and the mating surface, and correct whatever issue you find.

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Thank You!
Fred
2009 ML350
2004 SL600
2004 SL500
1996 SL600
2002 SLK32
2005 CLK320 cabrio
2003 ML350
1997 C280 Sport

If the o-ring is being "spit out" - then you're looking at one of the surfaces being warped...

Check the mating surfaces with a flat-edge...any irregularity should show itself...

All OK? Then...

Put a thin bead on both sides of the gasket, assemble the parts and let the repair SIT 'til the sealant (according to the directions) has a chance to cure completely, first...

Once that's done, THEN start it up.

Don't run the engine 'til the goo cures...

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M. G. Burg
'10 - Dakota SXT - Daily Ride / ≈ 172.5K
.'76 - 450SLC - 107.024.12 / < .89.20 K
..'77 - 280E - 123.033.12 / > 128.20 K
...'67 - El Camino - 283ci / > 207.00 K
....'75 - Yamaha - 650XS / < 21.00 K
.....'87 - G20 Sportvan / > 206.00 K
......'85 - 4WINNS 160 I.O. / 140hp
.......'74 - Honda CT70 / Real 125
.
“I didn’t really say everything I said.”
. . . . . . . . . . . . . . . . . . ~ Yogi Berra ~

Sealant should only be used where the engine manual says it needs to be used.

I use Tribond, most major Japanese auto and motorcycle makers use that. Works excellent as a sealant for my OM616 valve cover. Even after 20,000 miles I have no seepage.

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99 Gurkha with OM616 IDI turbo

2015 Gurkha with OM616 DI turbo

2014 Rexton W with OM612 VGT