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Any tips for scraping head gasket off the block?

6

641Dave

Member
...and not getting crap down into the crank case or water jacket?


I was figuring on stuffing cotton in the holes and pushing them down past where the scrapers is going to work, then carefully blow everything clean and carefully remove the cotton balls.


I was just curious as to what you guys thought or did.


By the way, the head looks pretty darn straight to me. Still though, I'm taking it to one of our mechanic legends here close to home to eyeball it tonight and explain what all this port and polish stuff means. :wink:
 
I'd sooner pull the oil pan than stuff cotton balls
in the holes.What would happen should a cb get lost
and find its way into an oil passage or water
jacket?
 
I use the rolls of paper shop towels for things like that. That way I can pull 'em and use them with some solvent to wipe it all down.
 
I think your worrying to much, Water jacket isn't going to hurt anything and the oil sump has a screen for large stuff and a filter for the rest. Pull off the old gasket, clean it up with a wire brush, and blow it off real good. Only thing I "block off" is the cylinders (roll it over so I can stuff an oily rag in each cyl to keep crap off the rings). I have never had an issue with crap getting in the block in 100+ gasket changes.
 
I'd stuff rags in there, then carefully scrape away ,and then vacume ,then remove the rags.
 
i agree like 'DELTARED', if you are going that far, pull oil pan and clean it also, plus you can look at underside, when done, can flush oil channels with oil, solvents and let it drop in a catch pan..flush h2o out also, be like having new engine..
 
The pieces of gasket and gasket sealer will be less
destructive than the cotton balls when they get away
from you (and they will, don't ask me how I know)
 
I use a handheld propane torch to burn stuck gasket material
then scrapers to peel residue, fill the block with water to keep
things out of it, and oily rags in the pistons (turn engine until
pistons are all below the deck).
 
get a stiff putty knife,( has to be very rigid, flexible one will not work) put a sharp edge on it, and you have a gasket scraper, used one for years
 
Whatever you wind up doing, do NOT use those fancy little abrasive wheels in an air drill.

They do an impressive job, but the grit from them goes everywhere you don't want or need it. Might as well pour a handful of sand in the engine.

When I was doing service contract claims, we'd authorize intake gaskets on a car, and a month or two later we'd get a claim call from the same shop on the same car with the bearings out of the lower end. Standard first question was, "Did whoever replaced the intake gaskets last month use those little abrasive wheels to clean the gasket surfaces?"
 
Is no trade off for a Lisle brand gasket scraper that can be had at many or most parts stores.

If you have the head off, you most certainly are going to change the oil and antifreeze. But, doesn't hurt to try and minimize it by stopping up holes. Also, take a Shop VAC when done, tape up the hose end with a tube, straw, or something that won't hurt the cylinder walls, to run around the pistons to get any dirt out that will fall down along the edges where they meet the cylinder walls, after you wipe the cylinder walls will something clean that won't leave crap all over them as you wipe gasket debris off of them before buttoning it all up.

Mark
 

I pick a good wide, long Coal-Chisel, Sharpen it up good and true..
Will peal the gasket off real easy..
Use old socks for stuffing in the holes..!

Ron..
 

I use a plain old gasket scraper and just push in a direction that doesn't go towards holes. It has never been a concern.
 
I shove paper towels into the block holes and use a wire wheel to clean the block.I also have a heavy scraper i can tap along with a hammer if the gasket is still intact.
 
Grind a scraping sharp edge on the ond of an old flat file. No harder steel,better scraper, it will hold an edge for a long long time and rigid enough so you can really lean on it.

Like another posted, I have the scraper in one hand and the shop vac hose in the other to suck up the chips as you scrape them loose.
 
Use a gasket scraper and a razor scraper and don't push the pieces into the galleries or open holes... I never put anything in the gallery. The big pieces you hold onto. The small ones I don't worry too much about. Vacuum out with a shop vac when done.
Do get a bottoming tap and chase the head bolt holes to depth and MAKE SURE those are clean and dry to the bottom.


Rod
 
Stuff rags into the big holes, and run a shop vac, as you scrape. Final finish, I do use the die grinder, with the least aggressive nylon scouring or polishing pad, again with the shop vac!
 
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