Mi16 - XU9J4 - engine rebuild to go into a 309

[welshpug 1,662]

Only need to paint the covers as they're magnesium, the rest can stay bare, some wd40 will keep the corrosion at bay.

[petert 591]

Good work. I've never used 1215. Same sort of stuff by the looks of it.

[hoodygoodwood 72 3 Cars]

The 1215 that i bought seemed to have the same spec as the one you recommended , just the colour was different . I am going to paint the cam covers in black VHT wrinkle paint , i am currently experimenting on a piece of steel and i can't get it to wrinkle at all at the moment , 3 coats on as instructions state and no wrinkling so have put a 4th on and will check in the morning . Will use satin black engine enamel if i have no joy with the crackle finish . The block is mint after wet blasting and i am not taking any chances with the glass beads so it was in the bath with the shower head cleaning out all the oilways with the help of bottle brushes . Liner ( Goetze ) protrusion looks good as well , i have a bit of pitting from corrosion of the inside of the block , is there anything worthwhile to apply to protect for the future .

[hoodygoodwood 72 3 Cars]

Have put several coats of black VHT paint on the exhaust manifold and cured it in the oven ,

[petert 591]

Black ceramic coating would have been nicer. It's not too late.

[hoodygoodwood 72 3 Cars]

I was just cleaning up the oil spray bars before refitting them to the block and i assumed that you would be able to check they were not blocked by just blowing through them , needless to say they appeared blocked and even connecting a length of dizzy vacuum advance pipe to a bike pump couldn't get any movement . After a few cycles through my ultrasonic cleaner and a bit of poking with some wire ( bike gear cable ) i can now blow air through but there is more restriction than i expected - is this normal ? I will be loctiting the 8 bolts when i refit them but was wondering if i need to use some sealant on the little spigot that goes into the block , its not a very tight fit . 

[petert 591]

They can become blocked. I gave up on an XU10J4 spray bar yesterday in fact. The check valve is usually the culprit. You can usually make it flutter with some compressed air. No sealant on the spigot but use 243 Loctite (or similar) on the threads.

[SRDT 183]

At what pressure are they supposed to open? You probaby don't want them to open at idle.