Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

The Regular Stuff: Chat, Buy, Sell, Off Topic, etc. => General Discussion - Scale Model Gas Engines - Hit & Miss - Throttle Governed - Non-Compression – etc => Topic started by: Mattbower78 on April 12, 2020, 06:11:54 am

Title: Re: M90 Head Gasket leak
Post by: Mattbower78 on April 12, 2020, 12:02:34 pm

Okay I will try that, thanks for your help.
Matt

Title: Re: M90 Head Gasket leak
Post by: yozhek on April 12, 2020, 07:20:47 am

Hi Matt,
I have seen this a few times on these M90s, the top of the liner sits in a recess in the block which is a tiny bit too deep to keep good pressure on the gasket. A very thin smear of gasket sealer where the gasket mates to the liner will fix it, or you could anneal the head gasket and try that (personally i had no success with this).
Hope this helps
Ade

Title: M90 Head Gasket leak
Post by: Mattbower78 on April 12, 2020, 06:11:54 am

Hi all,
Is it usually common for there to be a little leak out of the cylinder head gasket? I noticed that there was very small bubbles coming out of the head when i turned the engine over, does anyone else have this problem?
Thanks,
Matt.