Questions tagged [cylinder-head]

Cylinder heads (commonly just called "heads") are the big piece of metal which caps and seals the end of the cylinder bore.

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1answer
39 views

Properly diagnose coolant leak after head gasket repair?

I bought a BMW E46 330Ci (M54 3.0L Engine) that was not properly maintained. It was leaking coolant and sputtering white smoke and water from the engine (didn't sound smooth). Coolant pipes were also ...
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19 views

Physically broken camshaft position sensor

The check engine light on my 2006 Toyota Tacoma V6 went on and, when I did OBDII disagnostics, it turned out I had P0348: Camshaft Position Sensor A. I took the sensor out and it turned to be ...
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21 views

Triton blown gasket [duplicate]

If radiator bubbles when usually checking for blown head gasket could it be the thermostat causing that? Or anything else? Or is it 100% blown gasket. car usually bubble in the overflow after going ...
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Blown Head gasket for triton

My 2005 tritons overflow is bubbling every time I go to point A to B and sometimes coolant pours down to the floor I know that it’s a sign of a blown head gasket or an cracked head.. is it still safe ...
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93 Honda Civic LX - fluctuating revs, poor running

My Civic has done ~246,000 miles and is now running very poorly. While driving down Interstate Car bogs down stalls out and there's smoke from front and back. Spark plugs are fouled out and when ...
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38 views

Quick fix? Or major problem? Please help

Help, 02 honda civic lx coupe cranks but will not start. I bought the car less then 3 months ago put used rebuild trans in it seemd fine then what seemed to be running hot but with no warning signs so ...
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2answers
65 views

Oil still in coolant 99 Accord

Took my car to a shop and I honestly don't think they are the best even though they seemed like they knew what they were talking about. Long story short they did a head gasket repair, replaced the ...
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2answers
634 views

Engine makes tapping/knocking noise all the time, won't rev correctly and has no power

I own a Rover 25 1.4l 16v 103hp (naturally aspirated petrol engine) from 2003. I've had some issues recently, and I don't know if they're related to each other, so I'll start from the beginning. ...
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1answer
790 views

Head bolt torque settings for Daewoo Matiz 800cc 2004/5

I'm looking for the Head bolt torque settings for Daewoo Matiz 800cc 2004/5. My research yielded 85--90 NSm from here, but it does not seem correct. Another site stated 65-70Nm. Any suggestions on ...
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109 views

Why facing the head block?

I have recently came across a problem. One of the rocker fingers (the one that touches the valve stems, and have cam rollers) on my diesel engine head has broken. This resulted in the pistons hitting ...
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1answer
341 views

How should I flush out a head gasket sealer?

I purchased a 2002 Ford Taurus, little knowing that it had a head gasket leak. After it was driven for a week or so it started overheating. I am assuming that the person that I bought it from put ...
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2answers
62 views

checking head gasket?

I have seen people turn on the heat inside the car before buying probably checking the head gasket or over heating of the engine? And some people press the coolant hose to check it. Can someone ...
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1answer
148 views

Can I use cylinder compression to conclude the valves are adjusted

Today a friend told me that my exhaust gas smelled funny and that I should check my valves. I don't find it very likely since the engine is around 6000kms old. Can I avoid the trouble by checking the ...
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1answer
95 views

Toyota 4EFE Cylinder head

Why does the Toyota 4EFE engine have 3 Allen Heads in the middle of it? The Cylinder head will not remove from the block. Do these Allen Heads need to be removed to separate the cylinder head?
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1answer
250 views

On a V6 engine is it OK to replace one head and not the other?

Situation is the cylinder head of a Mitsubishi 3.0 liter V6 engine was damaged after sucking a washer into the intake manifold. Question: is it OK to just replace the one damaged head or do both ...
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39 views

Ethanol or non-Ethanol?

Where I live gas is at $2.50 at 10% Ethanol at 87 octane and $2.90 for non-ethanol at 89 octane per gallon. I understand that smaller engines do not do well on ethanol. Is the loss of efficiency from ...
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1answer
284 views

What other problem than a blown head gasket can a failed C02 test indicate?

I had a very classic (or so I thought) case of blown head gasket in my car: Leaking a ton of coolant Bubbles in the coolant, when engine running Coolant seems to be brownish Failed CO2 Test on the ...
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51 views

Faulty cooling system but not overheating

I've got a Peugeot 2.0L HDI 2003 over the past several months I've had issues with the cooling system, it hasn't overheated until recently but has had other issues. It first started showing signs ...
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2answers
500 views

Is it possible to have a bad head gasket (or cracked head) without a loss of compression?

Vehicle/engine is a 1997 Jeep 4.0L inline-6 Cherokee Sport. I just got my oil sample analysis back from Blackstone Lab. Here it is. They say there's coolant in the oil, as indicated by the ...
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650 views

97 Honda civic white smoke coming out of the tailpipe

I am pretty sure it is a head gasket is there a quick fix for blown head gasket
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100 views

about TTY head bolts 1990 Toyota corolla 2e wagon manual shift with carburettor

I need to know if the torque spec is done in one sweep of the torque wrench or gradually quarter turn at a time up to the first 22ft lbs and then gradually again to 36ft lbs. and then 90 degrees. ...
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2answers
346 views

How come only one piston was damaged?

This is a 2007 Dodge Caliber 2.0 CRD (which uses a VW Golf 5 TDI engine). The valves on only 1 piston have come into contact with the piston, causing chaos in that cylinder. The other three are fine. ...
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2answers
2k views

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

This is a 1979 Leyland Sherpa 230 1.7 L Petrol "O-series" engine. I'm suspecting a blown head gasket and if this is confirmed I'll be removing the aluminium head and getting it resurfaced at the ...
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1answer
2k views

Bubbles in radiator despite several cylinder head overhauls

I have a Nissan FB13 Supersaloon. The car started having radiator problems when the radiator was blocked. After repairing the radiator the engine started building pressure and you could see bubbles ...
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1answer
2k views

How do I remove debris from spark plug well (without damaging the head)? [duplicate]

The problem is that either someone didn't use anti-seize or someone forced in the plugs wrong (or both) because I've had the jolliest time trying to remove them from this 2002 Nissan sentra 1.8. I ...
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1answer
598 views

Evaluating a Head Gasket Replacement

Car: 1991 Volvo 240 History: There was oil in the coolant expansion tank. I did a leak down test and could hear air bubbles in the radiator so assumed the head gasket was bad. I subsequently ...
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10k views

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

Wondering if the block or head can still be used?
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1answer
67 views

Engine Burned Oil | Trying to Diagnose with Compression Meter

I changed the oil in my car (1997 Volvo S90 with approx 200k miles on it) about 2k miles ago, and recently took a couple long car trips (~400 miles each, up and down mountain roads, etc). When I ...
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1answer
260 views

I made a Hole-in-One. I dropped a Small extension and socket fall into valve.there's not in there [duplicate]

Two mechanics fell around in the spark plug hole and claim they didn't see anything or feel anything. That it probably popped out when I started the engine. What are the chances they are right? I'm ...
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1answer
2k views

Honda civic 03 overheating, checking the cylinder head and block for cracks?

I have 150k on my 03 Civic it has overheated several times. I can drive the car around town without it overheating, but when I drive it on the highway for an hour and it will overheat. I thought I had ...
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4answers
1k views

Can i Use The Same Old Bolts On The Same Cylinder Head? [duplicate]

Car: 2010 Passat CC 1.8 TSI Would it be a really big problem if I use the old cylinder head bolts or not?
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92 views

Engine overheating

I need some advice, I bought a 52 Corsa 1.0 about 2 weeks ago as our other car failed the mot badly and wasn't worth repairing. It's overheating rapidly (5-10 mins of driving) it looses pretty much ...
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98 views

Fiat Uno 1.0 cylinder head valves

I would like to know how to remove the valves from the cylinder head.
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1answer
2k views

Checking engine head for flatness: what clearance generally, in mm?

This engine's (Skoda Estelle/120, 70s, RWD, rear mounted engine) head is cast iron, the block is aluminium and I'm checking it's flatness. What would be the correct flatness clearance range? I have ...
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1answer
663 views

Piston deck clearance: is 1.4 mm under deck too much?

I'm installing a piston set in a Skoda Estelle 120 engine. I know this is not a definite way to measure piston to deck clearance, but it jumped to my mind to measure it with a vernier caliper using ...
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1answer
949 views

Removing head while maintaining timing chain tension & position

I'm pulling the head off of the Solstice (2006, 2.4L Ecotec LE5), and would prefer not to have to remove the timing chain cover to get the timing set correctly. The last time I did this, the engine ...
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3answers
911 views

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

In the parts manual for the engine I'm rebuilding (Skoda Estelle/120, RWD, rear mounted engine) I see they list washers for all the head bolts. I have changed the way to secure the head against the ...
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1answer
3k views

This valve is pitted - what options do I have?

This is that infamous Exhaust Valve #3 after cleanup. The cylinder had a history of fuel/spark-related misfires. As the images show, the lip of the valve is pitted. Here is the back of the valve. I ...
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1answer
753 views

Is this cylinder head junk?

There's a chunk of aluminum missing from the surface of my LS1 cylinder head. In the picture below it is located on the edge of the rusty looking cooling jacket port. Is this something to be ...
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1answer
89 views

Stripped out head for rocker arm bolt

I have a rocker arm in my '03 Century Custom that has stripped out the head. I tried to tap it and helicoil it but unfortunately the tap went sideways. I am thinking that I may be able to drill and ...
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1answer
2k views

Head bolt sequence for 4.3 liter 1995 Chevy 1500

What is the head bolt sequence for a 1995 Chevy truck 4.3 liter engine?
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1answer
43 views

Head studs' threads larger length: problematic issue?

As I'm getting ready to (finally!) re-assemble this old engine (Skoda Estelle/120 '70s, RWD, rear mounted engine), I needed/wanted to change a few studs, but basically all of the head studs are ...
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2answers
345 views

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

While I was taking apart a 2003 3.8L Ford Mustang that I recently bought, one of the many small acorn shells I found on the engine fell into a cylinder through the intake port (red arrow in the photo)....
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0answers
994 views

Timing related on 2000 Ford Excursion 6.8 Liter V10

Kind of a lengthy question. I had to pull the cylinder heads in order to repair exhaust manifold bolts that were broken. Unfortunately, I was not able to do it from the wheel wells. Before starting ...
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1answer
2k views

Spark plug thread broke inside the engine [duplicate]

I took out the spark plug on the fourth cylinder and it appeared to have some metal on its thread I cleaned it out and put it back inside while tightening it the thread broke inside The part in ...
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2answers
34k views

Bubbles coming out of the radiator. Head gasket?

I was bleeding air from my Honda Civic yesterday. Everything was going well until the coolant was still bubbling after 40 minutes of bleeding. I did everything correctly. Turned the heater to max, I ...
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3answers
515 views

Should I get 2nd Opinion on head gasket issue?

My daughter's car had a check engine light on and was overheating. We had it towed to a mechanic and he did the block test with the vapors. The mechanic said the blue stuff turned yellow immediately ...
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2answers
496 views

Can leaky cylinder explain oil loss to burning?

One out of the 6 of my Toyota Tacoma cylinders is mildly leaking, as indicated by a cylinder leakdown test. While other cylinders are leaking only something like 5-10%, this one leaks about 20% of the ...
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0answers
28 views

Is engine start failure reason for dealership mechanics to check fluid levels? [closed]

My daughter's car was towed to the nearest Toyota dealer because it stalled. All lights came on in dash and it smelled burned. We were given a clean bill of health the next day just to have it towed ...
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2answers
48 views

Need Advice On Designing New Cylinder Head

I am an engineering student. And we have an assignments to test our abilities on working on something new that you never worked on, to help with problem solving and to allow us to tackle any problem. ...