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side cover gaskets

Posted by MCCT

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side cover gaskets #1
MCCT Charles Tisdall Auckland, New Zealand 1967 MG MGB	Posted: July 01, 2012 06:51PM Registered: 4 years ago Posts: 1,122

both my side cover gaskets are leaking..aagain..so need to replace...on 1967 engine with front breather connected to PCV etc

all advice appreciated....do we favour rubber on the front etc etc??

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Re: side cover gaskets #2
chris Chris Roop Pendleton, OR, USA	Posted: July 01, 2012 06:55PM Registered: 14 years ago Posts: 30,247

I favor rubber or silicone. You can't torque too tight or the plate warps and leaks. You can't torque too light or the plate leaks. A welder might be nice.

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Re: side cover gaskets #3
MCCT Charles Tisdall Auckland, New Zealand 1967 MG MGB	Posted: July 01, 2012 06:58PM Registered: 4 years ago Posts: 1,122

is that for both Chris?(front and back?/)

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Re: side cover gaskets #4
chris Chris Roop Pendleton, OR, USA	Posted: July 01, 2012 07:01PM Registered: 14 years ago Posts: 30,247

Yes.

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Re: side cover gaskets #5
rrmgb robert schau Reston, VA., USA 1973 MG MGB 1973 MG MGB	Posted: July 01, 2012 07:28PM Registered: 6 years ago Posts: 8,984

If rubber is used on the flat one (front I think), there is a good chance you will distort the gasket when it's tightened. I prefer a flat gasket on the flat one. The other has a groove and will capture the rubber gasket. Silicone sealer can be slippery. You can't just
apply and walk away. It needs to set up a bit before final tightening especially if you dont use a gasket.
There's always the one piece cover alternative.
RS

"It is a mistake to try to look too far ahead. The chain of destiny can only be grasped one link at a time."
Sir Winston Churchill
---------------------------------------------------------------
"It all starts in your mind's eye, then it goes to your heart
and finally to your very soul."
G.S.George PHD

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Re: side cover gaskets #6
Speedracer Hap Waldrop Greenville, SC, USA 1967 MG MGB "The Biscuit"	Posted: July 01, 2012 07:54PM Registered: 7 years ago Posts: 20,325

I Put the flat cork gasket on the front one, dry (other than a couple of dabs of permatex Ultimate black on the back side of the cork gasket to hold it place as i put the side cover on , and use the rubber one on the back,l bout use a really thjin smear of the Ultiamte black on both sides of it. I find the rear cover to be the more problematic one, because people overtighten them, and distort them. Also a big source of leaks here alot of the time, is not gasket at all, but rather having the proper hardware for the retaining bolts, there should be a cup washers and rubber seals used here.

Hap Waldrop
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Re: side cover gaskets #7
B KRAZY Bob Coombes Langley, BC, Canada 1973 MG MGB GT	Posted: July 01, 2012 08:02PM Registered: 5 years ago Posts: 23

as usual Hap is bang on.

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Re: side cover gaskets #8
MGB567 Barrie Braxton Sunshine Coast, Australia 1966 MG MGB MkI "Money Guzzler"	Posted: July 01, 2012 09:00PM Registered: 2 years ago Posts: 5,324

Charles I know I emailed you but given Hap's reply that's what I did only I used the cork on the rear too. It took me awhile to sort out the correct cups/washers as you can see from this link - perhaps it was me but I found it a little confusing:

http://www.moss-europe.co.uk/Shop/ViewProducts.aspx?PlateIndexID=189

CKD 11/66 first registered 8/5/67 owned since 3/77. Undergoing nut and bolt restoration. Tartan Red (now). 18GB +40 balanced with almost all new internals. Peter Burgess big valve fast road head. Piper 285. TT exhaust. ARP everywhere. 123 ign. Needham 4synchro c/r box. Stock rebuilt/replaced suspension. Superpro bushes. New brakes all round including all pipes in SS flex. Interior redone. CAMS approved roll bar and side bars. Lots more. Hybrid of o/e and show/fast road car. Not for sale - it's my toy!

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Re: side cover gaskets #9
sweep Chris W Gosford NSW, Australia 1966 MG MGB "Basil" 1990 Nissan Patrol "(Patrol) The Beast" 1992 Subaru Legacy "(Liberty)"	Posted: July 15, 2012 09:07PM Registered: 6 years ago Posts: 4,201

Charles, a bit late to this party but I found that the cork gasket supplied for my front plate was simply too thin given the uneven lip on the plate and even after tightening the lip was touching before the gasket was under any pressure. I tried to get some thicker cork to make my own without success.

I doubled up with a piece of thinner cork and lots of aviation sealer ( the one that stays sticky) and so far no leaks. It's still early days but so far so good.

If I'd had more time I think I would have carefully gone over the plate lip with a file to take down the high spots and slightly shorten the lip - so that it still did it's job of retaining the gasket but didn't hit the block before the gasket was under pressure.

Chris, and I love my overdrive!

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Re: side cover gaskets #10
Speedracer Hap Waldrop Greenville, SC, USA 1967 MG MGB "The Biscuit"	Posted: July 16, 2012 07:19AM Registered: 7 years ago Posts: 20,325

Chris , that Payen gasket set has the correct thickness cork gasket for this, the rubber/silicone gakset has to stretched over the front cover to work. Normally the rear cover is the issue, it gets overtightened and warps. The cup washer on the two retianing bolts, as you know, are critical to a good seal as well.

Hap Waldrop
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Edited 1 time(s). Last edit at 07/16/2012 07:01PM by Speedracer.

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Re: side cover gaskets #11
Jim K James A. Krasnansky Liberty, KY, USA 1970 MG MGB GT "Chloe" 1971 MG MGB GT "Roscoe" 1972 MG MGB "Camilla"	Posted: July 16, 2012 07:21AM Registered: 9 years ago Posts: 7,913

My '65 BMC MG shop manual says 4 ft/lbs for the rocker cover.

Jim K is a grease-stained wretch

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Re: side cover gaskets #12
Speedracer Hap Waldrop Greenville, SC, USA 1967 MG MGB "The Biscuit"	Posted: July 16, 2012 08:20AM Registered: 7 years ago Posts: 20,325

In reply to # 2121366 by Jim K My '65 BMC MG shop manual says 4 ft/lbs for the rocker cover.

Yep, and no more than that needs to be applied to the side covers, this is good place for some locktite, let the loctite secure the bolt without overtightening it.

Hap Waldrop
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Re: side cover gaskets #13
senior citizen Dale G Cumming Georgia, USA	Posted: July 16, 2012 12:36PM Registered: 11 months ago Posts: 20

I fought the same problem with my '79, and found out something interesting. It wasn't the gasket or the cover that was bad--it was the opening in the block. Clean the block, set cover in place and scribe around it, then place gasket inside marks. What I found on mine is that the gasket only has about 1/8" of sealing surface, in some spotes a gap, so no seal at all. The front one is the worst. I used form-a-gasket all around with no gasket and no problems since

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Re: side cover gaskets #14
riley1489 Bruce Hopgood Montreal, Quebec, Canada 1973 MG MGB	Posted: July 16, 2012 01:47PM Registered: 1 year ago Posts: 743

Hap is right on. Correct hardware, Loctite and low torque on the bolt is the ticket.

Your driveway will love you ............. !!

salut
B

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Re: side cover gaskets #15
bills Bill Spohn W. Vancouver, BC, Canada 1956 MG MGA 1958 MG MGA Twin-Cam 1962 MG MGA MkII Coupe 1965 Jensen CV8 1969 Lamborghini Countach → more	Posted: July 16, 2012 02:07PM Registered: 8 years ago Posts: 9,160

Use rubber on both. Just contact cement them to the covers before installation and you won't have any issues with them wiggling.

Bill Spohn www.rhodo.citymax.com/carstuff.html
1958 MGA Twincam (race car), 1962 MGA Deluxe Coupe
1969 MGC roadster, 1957 Jamaican MGA
1965 Jensen CV8, 1971 Jensen Interceptor
1969 Lamborghini Islero S, 1988 Fiero GT turbo
2009 Pontiac Solstice GXP Coupe
West Vancouver BC

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Re: side cover gaskets #16
9146 rick dentel yardley, pa, USA 1970 Porsche 914 1978 MG MGB 2002 Mini Cooper	Posted: July 16, 2012 02:45PM Registered: 1 year ago Posts: 1,362

Check the rear cover with a straight edge. Most of the ones I have seen look like bananas,it seems people just over tighten them when they leak (and than leak worse).

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Re: side cover gaskets #17
melbaver Chris Howells Broadwater NSW, Australia 1968 MG MGB "Moneypit" 1996 Jeep Cherokee "Shopping Trolley"	Posted: July 16, 2012 07:53PM Registered: 5 years ago Posts: 4,970

Charles,

Saved in MyEbay list for ages, will get around to them eventually.

Chris Howells

1968 MGB Purchased already dis-assembled which is why I'm often ignorant about what some parts are, and even more ignorant of where they go.

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