Piston problem

JohnG
Posts: 25
Joined: Thu Jul 02, 2020 5:44 pm

Re: Piston problem

Post by JohnG » Sun Oct 18, 2020 6:46 pm

Hi Tony,

Sounds like good advice. Thank you very much.

Regards,

John

GOY189
Posts: 475
Joined: Sun Oct 19, 2008 5:08 pm

Re: Piston problem

Post by GOY189 » Mon Oct 19, 2020 7:56 pm

I suggest that you make sure that the crankshaft and the cylinder are well protected with oil when the conrod/ piston are removed. Surface rust is possible and would add to your problems
Mike

JohnG
Posts: 25
Joined: Thu Jul 02, 2020 5:44 pm

Re: Piston problem

Post by JohnG » Tue Oct 20, 2020 1:05 pm

Hi Mike,

Thanks for the tip. Will do.

Regards,

John

JohnG
Posts: 25
Joined: Thu Jul 02, 2020 5:44 pm

Re: Piston problem

Post by JohnG » Sun Nov 01, 2020 8:55 pm

Work is proceeding a bit slowly because of limited time and the fact that every nut etc. seems to put up quite a fight before allowing itself to be removed. I have removed number 2 piston con-rod cap and the crankshaft journal looks a fair bit smoother than number one, though not entirely unblemished. I'd welcome a second opinion about state of number 2 con-rod cap bearing — as far as I can tell the metalling remains intact but it looks a bit patchy, and lacking experience in these matters, I'm not sure if it's still ok. Thanks.

Regards,

John
Attachments
Con-rod cap 2.jpeg
Con-rod cap 2.jpeg (67.54 KiB) Viewed 249 times
Crank 2.jpeg
Crank 2.jpeg (53.64 KiB) Viewed 249 times

User avatar
luli
Posts: 430
Joined: Sat Jun 04, 2011 6:49 am
Contact:

Re: Piston problem

Post by luli » Mon Nov 02, 2020 3:19 pm

The dots you see in the white metal are particles which were sink inside it - indicating bad filters, poor oil pump or dirty oil jackets. And there is no alternative to measurements when it comes to bearing-journal state. Plastigauge is a good candidate. There is an old saying about the road to Jerusalem: The first which looks short but it is long. The second is that looks long but which is short: Remove the engine from the car, take it apart, clean and check everything and correct as necessary. Not only the work will be much easier comfortable and accurate but little chances that you will have to start it over very soon.
Rover 10 1946 RHD
Rover 10 1947 LHD
Rover 12 1947 tourer LHD
http://lulisml.wordpress.com/

JohnG
Posts: 25
Joined: Thu Jul 02, 2020 5:44 pm

Re: Piston problem

Post by JohnG » Mon Nov 02, 2020 5:45 pm

Hi Luli,

Thank you for your insights and advice. And I take your point about the road to Jerusalem. It's a very good way of putting it.

Regards,

John

Post Reply