Head surface prep?

[theman53]

I looked and it said the permatex is vinyl acetate and hylomar is a polyurethane. This is what I have found for good part numbers in a tube.
 
 71301 HYLOMAR, SOLVENT FREE, 3.5 oz.
 

[RunninWild]

Some stuff came in the mail today! Was able to get the new head prepped with everything minus the parts still on the engine. Running 2 new coolant sensors this time so no excuses if I cook the head again.


Little disappointed in the timing tools from prothe. The dial gauge is decent quality but the adapter that screws into the pump pinches the needle on the gauge and doesn't let it move freely. It goes up fine but puts too much tension to let the needle return to 0. It also came with the locking pin for the 1.6 style pumps not the aaz one I ordered it for 😞. I guess the pin isn't technically necessary but it would definitely help hold it tdc while messing with the timing belt.

[RunninWild]

Pulled the old head today and... Looks like I got pretty lucky. Blocks been recently rebuilt with 1st oversized pistons. Bores still have crosshatch in them and the pistons look brand new! Small buildup of carbon on the top of the cylinder but no ridges. Still waiting on my roloc disc, studs and head gasket in the mail to get it cleaned up.



I can't see any obvious signs of the head gasket leaking but then again I only drove it for maybe 15min after the original overheat. The coolant system for pressurized enough to trip the relieve in the overflow so I'm assuming that meant it had to be leaking. There is one crack in the gasket but it's from a coolant jacket to the outside of the head. Didn't really drive it long enough to notice any leaks there though.


Old head looks ok. 2 of the precups have cracks. 1 of them looks like it might be a problem in the future.


Excited to get this thing back on the road so I don't have to take the bus anymore!

[libbydiesel]

In that last pic, that closest prechamber insert looks cracked on both sides.  In a few more miles that front piece could fall into your engine...  You have been warned.

[RunninWild]

Yeah that's the old head I'm not going to use it. Precups definitely need to be changed in it. It'll be going up for sale soon.

[RunninWild]

How clean does the block need to be? I scrapped all the gasket off and went over it with a roloc disc. I'm tempted to make it shine like a mirror but too much with the roloc is probably worse then not enough. The surface feels smooth when scrapped with a razor blade but there's marks on it still.

Obviously for tdc I put my dial gauge over the first cylinder then crank the engine until the number reaches its highest point?

I couldn't find any hylomar but I ended up grabbing a can of copper gasket spray. I've read of a lot of people having success with it and mls gaskets. Probably not as good as hylomar but I'm hoping it's sufficient.