Honda-SOHC

SOHC.co.uk Forums => CB750 => Topic started by: roverboy on October 30, 2024, 12:51:53 PM

Title: paint on engine block
Post by: roverboy on October 30, 2024, 12:51:53 PM: hi can any body tell me should the engine block and head be painted or not as i am trying to keep my cb 750 original as i restore it any help would be appreciated
Title: Re: paint on engine block
Post by: Nurse Julie on October 30, 2024, 01:32:38 PM: Crank cases, head, barrels rocker cover and breather all painted, with side casings being polished.
Simoniz SIMVHT31D is the best paint product to use.
Title: Re: paint on engine block
Post by: McCabe-Thiele (Ted) on October 30, 2024, 03:39:30 PM: Then follow the baking instructions.

I did the Pyrotechnic Oven cycle clean first - added Brownie points gained - (didn't want to risk any discolouration from cooking spills).

.(https://live.staticflickr.com/65535/52632263747_1f325c1e7d_o.jpg) (https://flic.kr/p/2obW7ke)PXL_20230117_092117239 (https://flic.kr/p/2obW7ke) by Macabe Thiele (https://www.flickr.com/photos/187487200@N03/), on Flickr
Title: Re: paint on engine block
Post by: Sesman on October 30, 2024, 03:58:14 PM: Post oven.
Title: Re: paint on engine block
Post by: roverboy on October 30, 2024, 05:43:03 PM: thanks for your pics very helpful kind regards john
Title: Re: paint on engine block
Post by: TezzerTel on October 30, 2024, 05:52:58 PM: If I'm reading the instructions correctly the aluminium is only good up to 120Â°C ? Is this correct and is that hot enough?
Title: Re: paint on engine block
Post by: Nurse Julie on October 30, 2024, 06:18:02 PM: Quote from: TezzerTel on October 30, 2024, 05:52:58 PM
If I'm reading the instructions correctly the aluminium is only good up to 120Â°C ? Is this correct and is that hot enough?
Yes, that's plenty. Even internally the temps when running only reach 150-200Â°c, the exterior surfaces of the engine reach considerably less.