cylinder head reconditioning
Artikel Terkait cylinder head reconditioning
Are 3-cylinder engines as good as 4-cylinder engines?
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Fancy designing a car? Porsche’s head of design shares some tips
Michael Mauer is Porsche’s head of design since 2004.
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More 3-cylinder turbocharged Proton models coming – 1.5T MPI to be rolled out further
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Beyond the 1.5-litre 3-cylinder, Geely also has a 1.0-litre three-cylinder for the Chinese and European
2020 BMW X1 sDrive18i launched in Malaysia - RM 208k, 1.5L 3-cylinder turbo, 140 PS/220 Nm
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Previously, we’ve talked about why premium brands like Volvo and BMW use 3-cylinder engines in
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3-cylinder engine vibration, noise, and reliability: Still a problem?
Five-cylinder engines have the same problem too (or try one-cylinder). 3-cylinder (red) vibrates more
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Review Post cylinder head reconditioning
Reconditioning cylinder head surface on Vespa. East euro style! http://t.co/3VNZ9HPLkA
Porsche waiting at inspection lift for Car Cylinder Head Reconditioning Compression Tests Vacuum Testing and full car inspection https://t.co/0bhcrzqZoP https://t.co/lIFpeXnzyO
S-Max Cylinder Head reconditioning: Part 6- Manifolds painted https://t.co/UGLVNGBUWP https://t.co/qexLILDfsA
Reconditioning a cylinder head today. #boatsthattweet #boatmaintenance #hollandsboats http://t.co/ahLMbqKzEE
Cylinder head reconditioning. Software upgrades. OBD flashing. Headlight alignment. Full AA inspection. Major and minor servicing + repairs. Engine rebuilds. Do we need to go on? 🙂 Visit, like, share, and try out #GochAndCooperAutoServices to experience perfection in action 👍 https://t.co/OmBHy7T2qL
Our 78 Landcruiser cylinder head looking a whole lot better now! A special thank you to Allisons Machine here for doing a great job reconditioning this head. As you can see, all new valves installed, guides conditioned as necessary. Great finish on the resurfacing. https://t.co/6KMjhWNTfq
#DJSBU AutoPrecision Engineering is an award winning startup company that aims to deliver precise and quality engine rebuilding services i.e cylinder head reconditioning, engine block reboring & Crankshaft grinding in the heart of Phillipi township. Founded by 4 black engineers. https://t.co/8XAWOvNeXD
Quick reminder of what we do We Maintain We Repair We Sells Caterpillar Generator Parts, perkins parts, cummins parts, Turbo charger, Pumps, reconditioning of cylinder head #auntyada #MaltaMocktail #InnocentChukwuma #LUCY #Ejikem #sanchez https://t.co/CNYQAQI4Pu
🛠️ As part of our cylinder head reconditioning process, we assess the condition of the existing valves springs, to ensure the spring pressures are still within the manufacturers specifications. Learn more: https://t.co/zdXsa0aiJt #GEREngines #Engine #Mechanic https://t.co/l0IyZ1cC9T
Reconditioning of the cylinder head on modern CNC Neven machines. https://t.co/Rs6fgxzVKy
Review Q&A cylinder head reconditioning
Has 300,000 miles become the new normal for cars? How are more and more these little 4 cylinder engines able to do it?
My brothers Subaru Forester has done 405,000 kilometres with the EJ20 engine fitted,AFAIK it's original but it's had the cylinder heads reconditioned twice,the previous owner couldn't afford $1000+ AUD to replace the expensive timing belt kit but it was more expensive to get the cylinder heads rebuilt due to bent valves. The second time was due to bad valve seat recession from the use of LP gas & my cousins partner whose a Subaru mechanic got the cylinder heads rebuilt for $3,500 AUD including new valves, valve springs & valve seats. At the moment I'm waiting on a new idle air control valve for it as it's surging at idle due to a fault code 54 which is an air intake or choke system fault. Maybe the boxer engine has less friction,I don't know, maybe that's why they last longer now !
How long does it take to replace a head gasket in a 2000 year car?
How long does it take to replace a head gasket in a 2000 year car? A make and model and engine type would be most helpful. The year is less important. An engine like this one is pretty easy to get to and shouldn’t take more than two days for a good, practiced mechanic to get that head off, replace the gasket and put it back together IF all it needs is a new head gasket, which is rare on higher mileage engines: It’s right up there on top without much around it to remove to get to the head. This one might be much more difficult, especially for the rear cylinder head. The front cylinder head might be easier to get to. You are going to have to remove the engine to get to the rear one: That rear cylinder head is up under the car body in this car: Once you get the engine out, they are pretty easy to get to: This all precludes extra work that will need to be done if the cause of the blown head gasket means more work… If the head is not flat, it will have to be machined and most mechanics have to send that work out - at least a couple more days, maybe more if you live in a remote area. If the engine mating surface isn’t flat, the engine has to come out and that has to be machined. It’s a good time to do things like water pumps, timing belts, etc as you already had to take them off to get the head off. If you are doing one head, you need to do the other on multiple head engines. If you are going through all the trouble to replace the head gasket on a high mileage vehicle it is usually worth having the head reconditioned - a few days for that as most shops send that work out. If the cylinders and piston rings are worn and blowing oil, then you might as well pull the engine and rebuild that - you are already halfway there - finish the job and get a “new” engine. A head gasket on a 2.5liter subaru engine - one prone to base gasket failure on some years - means about 2 days for someone who knows what they are doing and is practiced at the job. But, you usually do other things like water pump, timing belt, idlers and pulleys, and clutch on manual transmissions, so that can add a bit of time.
What's the saddest manufacturing defect you've seen in a car?
I once had a reconditioned engine put in my Hillman Hunter (1980s). This engine came in two “flavours” 1500 cc and 1725 cc. The crankcase was the same in both cases but the crankshaft (different “throw”) and cylinder head were unique to the engine. It ran fine after the new engine was fitted, but drank 4 star, a 1725cc getting 22 miles/British Gallon - no way Jose. So my friend Richard and I tried giving it a full tune - twin Weber carbs, plugs timing, tappets etc. - but still no better!!. So, as a last resort, off with the head to do a de-coke (couldn't think of anything else to try). So, I’d got the head off and Richard came round for a look and noticed that - if that piston is at TDC, then that looks bit short ….. So we got the workshop manual, measured the stroke and found that we had (you guessed it) a 1500 crank in a 1725 engine!!….. OK, so the guy who fitted it for me palmed me off to the suppliers who, after A LOT of argument finally accepted that I was not some fool (like most know-alls are), but ,was, telling the truth….
Is it reasonable to ask $2300 to replace a gasket on a '98 town car?
There are dozens of gaskets in a vehicle. Which gasket are we talking about? Each one will have a different cost to replace. At the $2300 price you mentioned, we’re probably talking about the head gaskets and while that does seem a little high, it’s not out of the question. This is a big job that takes a long time. Also, they are probably quoting a full resurface and recondition of the cylinder heads by a machine shop which is definitely worth the money.
How do you fix a burnt exhaust valve?
A “burnt exhaust valve” cannot be “fixed”; it must be replaced. This is achieved by removing the cylinder head and physically replacing the damaged valve(s) with new or reconditioned parts installed on a properly machined and/or resurfaced head. Along with the machine shop work, this is - as one would expect - usually a very labor-intensive, and expensive, project.
Why do car engines last so much longer than they used to?
Every other answer is talking about advanced materials and tolerances… And those have literally NOTHING to do with it. Engine wear occurs when two moving surfaces touch. It doesn’t matter if those surfaces are soft lead, or diamond, wear will occur extremely fast. What stops them touching is the film of oil. the oil film fails if it gets too hot and only then will wear start. the oil film gets too hot when the oil is not pumped around the combustion areas fast enough, and that happens when the oil is cold. The ONLY reason modern engines last so much longer, is the oil used is almost unimaginably better. Here’s a great example. In 1951, the A series OHV engine was introduced in the Austin a 30 and the the Morris Minor. In normal use, this reliable, extremely tough 803cc motor would last around 10,000 to 20,000 miles before it needed a complete rebuild. An official Austin or Morris ‘Gold Seal’ short, (reconditioned crank, pistons, bores but no cylinder head) or complete (including head) engine was a service item, and was an expected expense every two to 5 years. The recommended oil was a straight 50 mineral oil. Here it is… In 2000, the last A series was fitted to a Mini.. A better fuel injected head, but thinner crank bearings , same engine, same materials used, same techniques and a lot of the same tooling as the 1951 version. here it is…. One of these will go 250,000 miles plus on fully synthetic 0w-40. (In the Mini, the gearbox is INSIDE the engine’s oil pan, … What you are seeing there is the complete engine and gearbox!) Throughout the 49 years of production, one can track the improvements in oil, simply by looking at the average longevity of this engine, fitted as it was to about 80% of cars made and sold in the UK through the 1950’s and ‘60’s. All the small British Leyland cars of the ‘70’s and ’80’s, and the Rover group Mini Metro and Mini until 2000. At least 5 million were made here and overseas . Oil is EVERYTHING…. Ironically, today, engines are built with more tolerance than they used to be…Which is why modern engines need very little ‘running in’. In the olden days engines were tight when new, which was because the cylinder bores were a very snug fit to the pistons. Oil was needed to fail to allow friction to ‘bed’ the surfaces together. Modern oils tend not to fail so the engine has to be built ‘looser’ so it will give its full efficiency from the factory.
Why is my engine overheating after reconditioning the cylinder head, replacing all the gaskets on the head and cleaning the radiator and flushing the cooling system?
Did the engine tend to overheat before you did this work? After checking the various aspects of the cooling system one more time, consider that you MAY have installed the head gasket backwards. In many cases this can be done. The holes for all the head bolts will line up, but quite a few coolant passages may be blocked. Been there, done that.
What are the signs of bad valve seals?
On a compression test if adding oil to the cylinder which has low compression doesn't improve it then it's most likely due to a bad valve,a cylinder leakdown test will also show up a bad valve when both valves are closed when the piston is at top dead centre with a hissing sound heard coming out of the muffler if it's an exhaust valve or the inlet manifold if it's an inlet valve. When I had the cylinder heads removed from my engine during a Hydraulic lifter replacement I filled the ports up with acetone to see if the valves & seats leaked,they didn't so I didn't worry about getting the cylinder heads reconditioned,the engine runs very smooth now as well !
What is the average repair cost for replacing a burnt exhaust valve? My car is a 2008 Subaru Outback with 160K miles. Is this an unusual failure?
The ’08 Subie 2.5L engine does have a requirement to check/adjust valve clearances. One of the worst things that can happen with valve clearances is what you’re experiencing now; a burned exhaust valve. The clearance on that valve was probably too tight and this caused the valve to be slightly raised or not come in full contact with the valve seat. Exhaust valves really take a beating because they get exceptionally hot dealing with the hot exhaust gases as a result of combustion. The way the exhaust valve temperature is moderated is when the valve comes in firm contact with the valve seat; the heat is transferred to the cylinder head and eventually carried away by the coolant flowing in and around the cylinder head. If this doesn’t happen, then the valve runs very hot all the time and eventually the metal erodes; the valve “burns” and loses it’s ability to seal. The cost is going to be primarily labor. The major parts are going to be the head gasket and the valve. The cooling system will need to be drained and the cylinder head will need to be removed. The burned valve will be removed, the valve seat reconditioned or a new one installed and the new valve installed. The clearances will need to be checked/set and the head reinstalled. My guess would be at least a grand …maybe $1500 …somewhere in that ballpark. It might behoove you to have the other cylinder head valve clearances checked while your getting this done. Yes it costs, but not near as much as another burned valve. As far as unusual? Lets just say it’s not a common ocurence but definitely one that can be prevented by having the valve clearances checked.
How much does a top-end rebuild cost for a 4-stroke?
I don't know why my dad didn't do it this way with his 3.8 litre Buick L36 V6 powered 2000 model Holden VX Commodore which suffered valve seat recession because he ran it in LPG fuel,well,he replaced the engine which is harder than getting the cylinder heads reconditioned. Many years ago I was looking for a quote to get the cylinder heads done up in my brothers old 1990 model Holden VN Commodore which ran the 3.8 litre Buick LN3 V6 engine, one machine shop gave me a quote to get them done up for LPG use which included fitting hardened exhaust valve seats at a cost of $600 AUD for a pair of cylinder heads. We got a machinist who worked at a Commodore wrecker to do them up for normal unleaded fuel use for about $300 AUD for a pair of cylinder heads,he had to replace a couple of valves I think which he just robbed from an old junk engine !
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