Exhaust Gasket

[spleecho]

Hey guys, I’ve searched and searched the forum for over an hour and couldn’t find anything, hoping for some help. I need two cylinder exhaust gaskets but can’t find the right one or right part number to check on aircraftspruce. It’s a 1964 M20E with 200HP injected Lycoming 360 A1A. Thanks! 

[carusoam]

Could be that they are Lycoming specific parts...

With all the detail you gave here... I would expect that to be enough to detail the exhaust gaskets.

Where did you run into trouble?

 

upon further review... I found some gaskets that are pretty high tech... not just a gasket material cut to the right size...

Check with your mechanic to see what the latest gasket technology that can be used on your plane is

Best regards,

-a-

[spleecho]

Pipes removed and seeing these are crush type gasket I want to do it right and replace with new ones when putting them back on. Right side only so two gaskets. Old ones no part numbers I could see at least. 

[carusoam]

I updated my post, after looking on line...

Let’s ask @M20Doc what the latest exhaust gaskets technology for Lycoming engines are...

Looks like there may have been some improvements since I owned my O360...

Nobody likes exhaust leaks under the cowl.  

Best regards,

-a-

[N201MKTurbo]

https://www.aircraftspruce.com/catalog/eppages/bloproofehaustgaskets.php

[MikeOH]

Just replaced the exhaust gaskets on my M20F with IO-360A1A.  I used the Superior SL77611 gaskets from Aircraft Spruce, P/N: 08-11999.

[spleecho]

59 minutes ago, MikeOH said:

Just replaced the exhaust gaskets on my M20F with IO-360A1A.  I used the Superior SL77611 gaskets from Aircraft Spruce, P/N: 08-11999.

Score! Thank you!

[DMM]

Here's some additional info you may find handy.  Lycoming Service Instruction 1204D. 

Exhaust Flange Gaskets.pdf

[spleecho]

Thanks guys, just ordered, looked the same as the ones I took off. Good to know on re-usability, one of them was crushed too much anyway and too cheap not to replace.

[HRM]

7 minutes ago, spleecho said:

...too cheap not to replace.

Exactly! One argument in favor of reuse is how easy the damn things are to R&R--NOT!

[carusoam]

Give a read on DMM’s SIs... it gives torque instructions and when to re-torque X hours later....

PP thoughts only, it was too short to not read... 

Best regards,

-a-

[spleecho]

10 hours ago, carusoam said:

Give a read on DMM’s SIs... it gives torque instructions and when to re-torque X hours later....

PP thoughts only, it was to short to not read... 

Best regards,

-a-

You're right, I would of missed the re-torque needed at 25 hours. Sucks I'll have to take off cowling again, hate doing it. Also forgot to order exhaust flange cotter pins, gotta go measure what size they are tonight, another day wasted.

[carusoam]

Aaah... look at it as time invested in keeping your good health... 

Similar to going to the gym.

Best regards,

-a-

[cliffy]

If you are using the spiral wound no blo gaskets a retorque is not required at 25 hrs. That only applies to the other style gasket. 

[spleecho]

Here is what I got, hopefully there is no right way up on these, seems very symmetrical on both sides. @cliffy

[cliffy]

spiral wound  no "up" side to them  they last a long time

replace all the washers and nuts at the same time.  lock washers especially

be sure to use proper torque for the nuts

Edited November 20, 2019 by cliffy

[Yetti]

and you need a ground down socket for one of the pipes

[spleecho]

 

22 hours ago, Yetti said:

and you need a ground down socket for one of the pipes

Almost done putting everything back together.

The book should most definitely be updated to add the following needed: ground down socket, two spare sets of replacement knuckles and a priest to stand next to you to forgive all the swearing you'll be doing.

Finally put in a 406 ELT while at it too and replaced all rocker cover cork gaskets with silicone ones. (Priest also needed while cleaning old cork from covers)

[HRM]

30 minutes ago, spleecho said:

Priest also needed while cleaning old cork from covers

I always just order a complete hangar exorcism after doing any major work on my E. I've invented expletives working on that thing because the existing ones just didn't do it.

[cliffy]

Then again, if you want easy get a 172. You stand behind the engine in those and work on them :-) :-)

[N201MKTurbo]

You can use a standard 1/4 inch drive socket on the inside nuts. It will bias the exhaust towards the outside. Then use a crows foot on the outside.

[spleecho]

You can use a standard 1/4 inch drive socket on the inside nuts. It will bias the exhaust towards the outside. Then use a crows foot on the outside.

Sorry not sure what you mean by that can you explain? Not sure I got enough torque on it right now

[N201MKTurbo]

1 hour ago, spleecho said:

Sorry not sure what you mean by that can you explain? Not sure I got enough torque on it right now

If you put a socket on one of the nuts it will push the exhaust away from the nut making the other side nut too close to the pipe to get a socket on it. But it is easy to get the outside with a crows foot.

[spleecho]

50 minutes ago, N201MKTurbo said:

If you put a socket on one of the nuts it will push the exhaust away from the nut making the other side nut too close to the pipe to get a socket on it. But it is easy to get the outside with a crows foot.

Oh I get it! Thanks!

[Guest]

Or you can use Snap On 1/4” drive sockets, they seem to be thinner walled and fit readily.

Clarence