in the process of dismantling my car's engine, so as to change the piston rings and grind the valves etc, how do i clean all the hardened black crud from the inside of the cylinder head and the barrels? can't use anything too abrasive on alloy. what has worked for you?
ps i don't mean the sludgy stuff - this washes off with a de-greasant, but the hard, laquer-like deposits.
pps anyone familiar with rebuilding the 602cc flat-twin aircooled motor from the citroën 2CV?? any practical tips welcome.
2006-06-30 02:41:45 · 6 answers · asked by beautiful sadness 2 in Cars & Transportation ➔ Maintenance & Repairs
you can safely use if your careful a wire brush attatchment on a drill, if you go to yout local auto store draper sell a pack of 3 which are specially designed to clean in to all the nooks and crannies of the engine, i presume your going to clean the valves as well , pop a drill in a vice and then pop the valves in there, use a scrapper or a pen knife (wearing goggles of course) and simply scrap the despoites off then startting with 120 production paper work your away up to 1000 wet and dry and this will clean the valves a treat and help give better swirl as well. If you need to remove the old head gasket from the mating surface of the head a good tip is to get a piece of glass and wrap production paper round there and use it as a flat surface to clean the head.
2006-07-01 03:13:02 · answer #1 · answered by gav552001 5 · 3⤊ 0⤋
fine grade wet and dry 1200 grit or higher use a scraper for the head near the vavle seats and wire brush the valve faces other than that just a bit of elbow grease and a lot of care. Get a book on that particular engine if your not sure try online or the library also mark individual parts and keep groups f parts together such as big end bearings and pistons etc
2006-06-30 02:45:10 · answer #2 · answered by ? 3 · 0⤊ 0⤋
As a engine reconditioner l would advise you to take the cylinder
head to a machine shop to be cleaned properly & to have the head face skimmed.
When dismantling short motor make sure each big end cap is kept on the same connecting rod.Also make sure each piston/con rod assembly goes back in the same bore.
The bores of your engine will need to be honed to allow rings to bed in, if not done correctly result will be high oil consumption.
when reassembling check big end bolts do not need to be replaced.BOLT FAILURE IS CATASTROPHIC!!!
P.S when head is at machine shop get your valves & seats cut properly as you will be grinding valves & seats for days and the job won't be as good.
Hope this was of help.
2006-07-01 03:13:29 · answer #3 · answered by Anonymous · 0⤊ 0⤋
The answer is acetone. Not only will it dissolve the carbon deposits but it will also help loosen any residual gasket adhesives. It's highly evaporative and very flammable so take proper precautions. You can find it relatively cheap at the local Menards in the paint section.
2006-06-30 02:48:28 · answer #4 · answered by Ricky J. 6 · 0⤊ 0⤋
Machine shops use chemical dip tanks, ovens and media blasting - if you access to any of these - do it. I think soda (baking soda) blasting is the gentlest on the casting with good results
2006-06-30 03:46:21 · answer #5 · answered by Caryl L 1 · 0⤊ 0⤋
Send the heads to a machine shop.
They probably need to be milled anyway.
You'll get them back in plastic bags
All shiny and ready to put back on.
2006-06-30 02:46:38 · answer #6 · answered by snakeman11426 6 · 0⤊ 0⤋