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12 votes

Why don't cars have a cylinder head with separate barrels?

There are a few factors to consider. Ease and cost of mass-production. Individual barrels require individual assembly, whereas a cast piece of metal has a lot of things built-in and assembly can be ...
tlhIngan's user avatar
  • 12.2k
10 votes

Do Most Common Engines Have A Cylinder Head?

As @rpmerf says, virtually all piston engines have at least one cylinder head. Most engines will have one head per bank of cylinders, as you suggest, though some have more - IIRC some of the ...
Nick C's user avatar
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9 votes
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How many times can you go through a torque sequence when installing heads? I'm worried I messed up and should try again but don't wanna make it worse

Considering you have torque to yield (T2Y) bolts, once torqued through the angle sequence, you're done. If you remove the bolts, you have to start over with new bolts. T2Y bolts are one and done, ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
9 votes
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Is this definitive conclusion of a blown head gasket?

High HC (Hydrocarbon) readings in the coolant system means exhaust gasses and or engine oil are getting in somehow, and the thing that normally prevents that is the head gasket, add in the overheating ...
motosubatsu's user avatar
  • 10.3k
8 votes

Should I get 2nd Opinion on head gasket issue?

It is ALWAYS good to get a second opinion. I would highly recommend taking it to another shop and have them tell you what they think it is even if you believe the first shop to be right. That being ...
Dalton D's user avatar
  • 1,958
8 votes
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Why are sheet metal engines not popular?

There are probably many reasons, though unless someone finds an article or information directly stating, anything you get for an answer here is going to be opinion or conjecture. The best I can offer ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
7 votes

Can you run an engine with an acorn shell in one of the cylinders?

You might get away with it, but I sure wouldn't recommend trying. The risks just seem too high. Instead try either blowing air into the cylinder with a small tube (to leave room for the shell to come ...
dlu's user avatar
  • 14.5k
7 votes
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Do Most Common Engines Have A Cylinder Head?

All piston engines must have a cylinder head. The head is on top of the block and forms the top of the combustion chamber. The head is also where the valves are. The valves and chambers in the head ...
rpmerf's user avatar
  • 8,403
6 votes

Why don't cars have a cylinder head with separate barrels?

Most modern car engines have overhead camshafts. Overhead camshafts pretty much oblige the use of a one-piece cylinder head. Imagine the difficulties of aligning the camshaft if each cylinder had a ...
Level River St's user avatar
6 votes
Accepted

Is this cylinder head junk?

This, in and of itself, is nothing to be worried about. The reason I say this is, it is not part of the sealing surface for a cylinder. There is more than enough meat there to seal the cooling port, ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
6 votes
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Can i Use The Same Old Bolts On The Same Cylinder Head?

Your Passat uses torque to yield bolts, so they must be replaced. The torque to yield bolts are considered "one and done". This is because during the torquing process, they are stretched beyond ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
4 votes
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Using a thicker head gasket when the cylinder head resurface limit is reached

The pressure generated at Top Dead Center on the Power stroke is very high. A "taller" gasket will have a larger cross-sectional area exposed to this pressure, so high "pounds/sq inch" grows ...
SteveRacer's user avatar
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4 votes
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Can I use hard tools to remove hardened carbon buildup on valves?

It is OK to used a metal tool on the valves. They are very hard and difficult to scratch. It is also OK to use oven cleaner on the valves. The steel is a relative of stainless and will be little ...
Fred Wilson's user avatar
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4 votes
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This valve is pitted - what options do I have?

This valve can absolutely be salvaged. You just need a valve job. You can have a look at what's entailed in a valve job by watching this Jafromobile video. To the uninitiated, I won't go through all ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
4 votes

Should I get 2nd Opinion on head gasket issue?

Wouldn't hurt to get a second opinion. However, be careful if you try diagnosing yourself. If coolant is leaking into one of the cylinders and you try starting the car you could hydro-lock the ...
texasranger's user avatar
4 votes

Bubbles in radiator despite several cylinder head overhauls

There are a limited number of places where combustion gasses can get into the coolant. A cracked head is the obvious one. It is also possible that it is a crack in the block going from the cylinder ...
HandyHowie's user avatar
  • 25.5k
4 votes

Valves in pizza box fell out does order matter if lapping

Lapping won't solve your issues. The only thing you can do is get the valves back in the right order or take it to the machine shop and get a valve job. The problem is, the valves are matched to the ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
3 votes

Washers under head bolts: Should I use them under stud nuts?

Yes, part of the function of a washer is to spread the load. If the manual or parts list lists them then they should be there - someone in the past may have made a mistake and left them out...
Solar Mike's user avatar
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3 votes
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Removing head while maintaining timing chain tension & position

I would use wire (welding rod is a good candidate) or small springs to "hook" the chain either side - obviously the top part stays loose but the bottom part around the lower sprocket stays firmly in ...
Solar Mike's user avatar
  • 34.7k
3 votes

Head studs' threads larger length: problematic issue?

They will be fine - did something similar in the past. You say hardened, but did you get a sufficiently high grade steel? i.e. strong enough? It would be good practice to use a compound to prevent ...
Solar Mike's user avatar
  • 34.7k
3 votes
Accepted

Need Advice On Designing New Cylinder Head

Any design for a cylinder head for an internal combustion engine will need to be able to cope with large amounts of pressure and heat - so you'll almost certianly need bolts to hold it down. You'll ...
Nick C's user avatar
  • 28.8k
3 votes

Why don't cars have a cylinder head with separate barrels?

Separate cylinder heads is actually quite common on truck, marine and plant engines. There are a few reasons but the main reasons are: Modular design, a manufacturer can just extend the block and add ...
Newbie Noob's user avatar
  • 2,780
3 votes

Do Most Common Engines Have A Cylinder Head?

Common piston engines all have cylinder heads (in the sense of a removable component that closes off the cylinder bore opposite the piston forming the combustion chamber). All internal combustion ...
dlu's user avatar
  • 14.5k
3 votes

Can i Use The Same Old Bolts On The Same Cylinder Head?

Replace the bolts, this has been covered in detail on this site : here is one such post with lots of detail : "Always Replace" (torque-to-yield) Bolts
Solar Mike's user avatar
  • 34.7k
3 votes

If a car has a rod knock what is no good the head or the block?

There's no way to tell for sure, but since a true "rod knock" has nothing to do with the block or the head, you could most likely reuse both of them. You'd probably want to do some work to them to ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
3 votes
Accepted

What is the likelihood of a cast iron block needing resurfacing along with its aluminium head?

Used to work on these and 99% you will be fine just doing the head. Do check the block - decent straight edge and feeler gauges... Make sure it is clean when you put it back together and follow the ...
Solar Mike's user avatar
  • 34.7k
3 votes
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Head bolt torque settings for Daewoo Matiz 800cc 2004/5

65-70Nm (48-52ft lb) - As seen in the workshop manual for that engine, here https://www.autocats.ws/manual/chevrolet/tis0808/EN/documents_2006/Matiz/sm-m/6M2_1B12.en.html#M1B1CHG. Note also the ...
PeteCon's user avatar
  • 8,712
3 votes

Head bolts over torque now what?

You seem to be asking, "I messed up but it is OK?" My answer is NO, this is not OK! You need to disassemble the engine and assess the damage. If the threads come out of the block, better ...
jwh20's user avatar
  • 12.1k
3 votes
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How much should you clean dirty pistons and valves when you aren't removing them?

You can do as little or as much as you want, it is your engine. Since you have already done a load of work disassembling the engine, to me it would make sense doing as much as you can while it is in ...
HandyHowie's user avatar
  • 25.5k
3 votes
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Cleaning head bolt shafts

Your best bet is to use a thread chasing tap. It is the surest way to get the threads clean. The brushes you show work great for cleaning oil passages and the like, but really don't clean the threads. ...
Pᴀᴜʟsᴛᴇʀ2's user avatar

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