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Inlet and Exhuast manifold sealers

Started by _73LJWhiteSL_ , Dec 27 2007 10:26 PM

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16 replies to this topic

#1 _73LJWhiteSL_

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Posted 27 December 2007 - 10:26 PM

Gday guys,

the 173 has a bad exhaust leak, and i was wonderin, what stuff do you guys use?

Obviously you have a gasket, but whats your prefered sealer?

Thanks

Steve

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#2 FastEHHolden

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Posted 27 December 2007 - 10:34 PM

flat mounting surfaces..best sealer going.

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#3 rodomo

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Posted 27 December 2007 - 10:50 PM

What type of gasket are you using?

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#4 _73LJWhiteSL_

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Posted 27 December 2007 - 11:01 PM

The metal style one.

Since i've learned about oil pump gaskets ( just the gasket and a bit of loctite #3 does the trick perfect, I've gained preassure back to where i was before i did the bearings and rear main seal and it hasn't leaked a drop) I may as well learn abou the exhuast and inlet gaskets. :spoton:

Steve

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#5 Heath

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Posted 27 December 2007 - 11:17 PM

Sylastic? I dunno the red stuff. Clean both surfaces then coat both sides of the gasket liberally, bolt it up and you only do it kinda finger-tight, wait a little while and then torque the bolts up properly. Has worked fine on all the motors I've done it to, never done it to a Holden 6 though...

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#6 rodomo

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Posted 27 December 2007 - 11:22 PM

The metal style one.

Since i've learned about oil pump gaskets ( just the gasket and a bit of loctite #3 does the trick perfect, I've gained preassure back to where i was before i did the bearings and rear main seal and it hasn't leaked a drop) I may as well learn abou the exhuast and inlet gaskets.

Steve

Yes metal are the go.
There are some that are like a perforated metal/asbestos type of thing, but the best ones have like a fire ring that surrounds the ports.

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#7 _73LJWhiteSL_

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Posted 27 December 2007 - 11:28 PM

Sylastic? I dunno the red stuff. Clean both surfaces then coat both sides of the gasket liberally, bolt it up and you only do it kinda finger-tight, wait a little while and then torque the bolts up properly. Has worked fine on all the motors I've done it to, never done it to a Holden 6 though...

The red loctite stuff isn't high enough temp. You have to use the Copper stuff. Tried that... sealed it for a while, cause it was done in Sep.

Rodomo, this one is metal with lots of 'holes' or 'pits' in it. One of them. Where would i get the ones with 'fire rings'?

Steve

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#8 rodomo

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Posted 27 December 2007 - 11:51 PM

I dunno.
I looked out in the shed (I thought I had one) and they were both the perforated as you described.
Maybe they are genuine?
Shop around.

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#9 torry nut

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Posted 28 December 2007 - 06:50 AM

An old mechanic once told me that he swears by good old wheel bearing grease. It doesn't go off like a silicone and is easy to apply and bolt up tight. It fills all the small little holes that need to be filled and can handle the heat no problems.

He has used it for years and never had a problem.

Anybody else heard of this ?

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#10 rodomo

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Posted 28 December 2007 - 05:14 PM

I dunno.
I looked out in the shed (I thought I had one) and they were both the perforated as you described.
Maybe they are genuine?
Shop around.

I checked at Burson's and Repco today and they both only have the perforated ones.
The bloke at Repco knew what I was talking about and mentioned the "asbestos" scare thing and hasn't seen one for some time.
He said best to look for "old stock".

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#11 Heath

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Posted 28 December 2007 - 09:57 PM

What's wrong with the perforated ones? I've bought one that wasn't perforated from box hill auto spares but I can't remember it having any kind of firing ring...

Edited by Heath, 28 December 2007 - 09:59 PM.

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#12 _Bomber Watson_

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Posted 28 December 2007 - 10:16 PM

Superjunk sells proper exhaust sealant. Works great.

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#13 rodomo

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Posted 28 December 2007 - 11:03 PM

What's wrong with the perforated ones? I've bought one that wasn't perforated from box hill auto spares but I can't remember it having any kind of firing ring...

There is nothing wrong with the perforated ones if all is good, but it seems like Steve is having "issues" and the other type will seal better for longer.

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#14 Heath

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Posted 29 December 2007 - 08:49 AM

Rightio.

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#15 _73LJWhiteSL_

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Posted 29 December 2007 - 12:51 PM

I might give this a go later... if it cools a down a little. I will make sure i clean it all up. I have some tubes of maniseal here, might give them a go again. Supposedly you have to 'kneed' the tube before application? Might explain why its always just leaked when i have done it in the past with maniseal...

Steve

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#16 _coupe202_

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Posted 29 December 2007 - 02:20 PM

a) having problems with manifolds not sealing put a straight edge on the manifolds frist to see if they are straight. if they are not straight they need to be machined.

are you using bolts or studs to tigthen the manifolds.

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#17 turbotrana

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Posted 30 December 2007 - 10:18 PM

The metal style one.

Since i've learned about oil pump gaskets ( just the gasket and a bit of loctite #3 does the trick perfect, I've gained preassure back to where i was before i did the bearings and rear main seal and it hasn't leaked a drop) I may as well learn abou the exhuast and inlet gaskets.

Steve

whats this thing about oil pumps that you learnt