17 replies to this topic

[cristiano1968]

hello im rebulding my engine  998cc  a plus

so  im upgrading  the camshaft plus 20  pistons .

budget is tight  i was going to buy a new stage 3 head.

so now i intend  to rebuid  the one i have  so ive stripped it measured valves they need changing so im going to change also the  valve guuides 

questiion do i need to change the valve seats  or can i leave the old ones in?

going to get it cleaned  at the the machine shop and get all the carbon build up  

any suggestions and advice warmly welcome

[nicklouse]

New guides means getting the seats recut.

 

to be honest leave the guides and seat cutting to a machine shop.

[cristiano1968]

do the seats wear out?

otherwise if not i will leave them in

[nicklouse]

They can but very unlikely. 
 

so like I said machine shop to remove and fit the guides and then recut the seats.

[Turbo Phil]

Unless the head has inserts in it, there is no removable seat as the valve seats are cut straight onto the iron of the head.
If it has inserts fitted they’re unlikely to be worn as they’re usually very hard wearing.
If you replace the valve guides you will need the seats recutting.

Phil.

[cristiano1968]

turbo phil 

escuse my ignorance what does seat recutting mean involve?

[drydavel7]

Search Classic Mini Tech on YouTube. 
Phil’s done some excellent informative videos on cylinder head restoration/modification.

[cristiano1968]

ok will do

thanks

[Turbo Phil]

Here’s my channel.

https://www.youtube....ser/MrTurbophil

[cristiano1968]

Seen the videos.
Good really good??

[Turbo Phil]

Seen the videos.
Good really good

Great, thank you. Glad you like them.

Phil.

[cristiano1968]

How bad does my cylinder head look?

[cristiano1968]

They look really blocked to me?

Attached Files

•  20200901_215459.jpg   37.59K   5 downloads
•  20200901_215447.jpg   42.21K   6 downloads
•  20200901_215436.jpg   36.67K   2 downloads
•  20200901_215423.jpg   42.28K   3 downloads
•  20200901_215412.jpg   46.29K   1 downloads

[dyshipfakta]

It’s pretty gummed up but I’m sure it will clean up ok

[Turbo Phil]

That’s one of the worst I’ve seen. Certainly time for a refurb.

Phil.