Questions tagged [valve]
Refers to engine intake or exhaust valves.
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Light abrasion on the valve stems - is the outlook gloomy?
Background
I'm rebuilding my LS1 Chevy. The cylinder heads came back from the machine shop fresh with a 5-angle valve job and mechanically-lapped valve faces and seats.
What concerns me is the ...
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Overfill oil on 1.5 Liter VTEC-e Civic 1995
I have a 1.5 Liter VTEC-e Civic 1995. The valves are noisy if I fill oil up to the manufacturer recommended level. But if I overfill by a quart the engine and valves are much quieter.
Is this ...
user25009
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Hyundai Santa Fe - Engine Oil Pressure Valve
Does anyone know where a 2007 Hyundai Santa Fe CRDI Engine Oil Pressure Valve is?
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EJ205 - Valves Seats Recut and Reseated by machinist then failed leakdown test on engine stand
After getting the community's help on my previous question, I sent my cylinder heads to a local machine shop to get a valve job done (valve seats cut, valves reseated, and valve clearances redone). ...
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Will leaking valve seals harm an engine?
I have a Nissan VK45DE engine with some oil consumption issues that I think are leaking valve seals.
What harm will come to an engine if used long term with leaking valve seals other than the ...
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Bent push rod, valve bent as well?
so i finally got around to opening up the head of my lawn mower and found out why it wasnt running.
the intake push rod is bent. and the exhaust is straight. obviously my valves were way out of spec ...
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Do valve adjusters ever go bad?
Do the top screw parts of the valve adjustment screw ever go bad?
Doing a valve adjustment on 2005 Honda Odyssey. On a few valves, the part that you adjust does not feel right. It is either too ...
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Check emission system displayed on dashboard display
For the last week it has been extremely cold where I live (varies between -27 to -33 degrees Celcius). Is it possible for a fuel cap check valve to freeze open?
Last night leaving work the display ...
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Identify Valve Noise RECORDING
What's that sound?
Sorry a little long (15:00) see notes below for TLDR.
https://drive.google.com/file/d/0B4e9w0OOuGinSVhqMVM5OHQwZ3c/view?usp=sharing
Note good power and smooth shifting at 3m10s ...
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Ticking after much engine work
This question is a follow up to this question: 1994 Honda Accord EX (F22B1) - Valves still making a ticking noise
Work I've done
Replaced head
New valves, new seals new gaskets
verified different ...
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Misfire! Does good compression mean there are no valve issues?
I have a new old stock sherpa "O" series petrol engine 1991 that I installed 3 years ago. I have a misfire on cylinder 1 (detaching spark plug lead makes virtually no difference to the ...
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Why is one bank of valves much more dirty than the other?
I'm replacing my valve cover gaskets because they are leaking. I noticed a significant difference between the valves in the front and rear banks. The front ones look quite dirty while the rear ones ...
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Possible Top end or VVT replacement required? 75dB+ knocking from engine top end - 2018 - Nissan Pathfinder
First the link
Hello,
I have a 2018 pathfinder with a reasonably loud (i'm estimating it at over 75dB standing about a meter back from the front of the vehicle). The sound seems to be coming from the ...
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Burnt valves, '08 Mercury Mariner 3.0 V6, similar to Ford Escape
Seeing if anyone else has ran into this problem on a Ford 3.0 V6? It's an '08 Mercury Mariner, 150K miles. Well maintained. High quality synthetic oil used in engine. Almost if not the same as a Ford ...
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How to interpret "crankshaft adaptation inlet Grad KW" value?
I'm trying to understand the meaning of this value and the implications of it being over the 120 limit.
Do you think you could help me out with some thoughts about it?
I think it should say "...
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Less oil on certain valves than others
I've got a 1986 3.8l 6-cylinder mustang. I've been hearing a ticking underneath the driver's side valve cover, so I took it off. I didn't see anything wrong so I started the engine sans valve cover. ...
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Is it worth replacing valve seals on a car with 200K kms?
I have a honda jazz 2003 gd1 1.3 with 200K kms on the clock. The car started burning oil around an year ago and occasionally (when the oil is topped up) puffing blue smoke puffs through the exhaust on ...
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Odd noise from top of engine
I'm helping a friend with their car. Its a 2014 Mazda 2, 1.5L engine, approx 105K miles. The car has been well maintained with regular oil changes.
There is an odd noise coming from the top of the ...
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Valve tap after engine is warm
I have what i believe to be a tappy valve in my 1991 4Runner, V6. It's quiet when the engine is first started, before the oil is warm, presumably. Once the engine up to temp the tap comes back. Does ...
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Toyota Sienna 1999 - Valve Stem seals
I've got a 1999 Toyota Sienna handed down to me from my family.
For the past year, on startup a heavy plume of blue smoke would come out. Researching online, I've read it's related to valve stem ...
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Tapping engine noise, but only with load and only for short time
2003 Toyota Rav4. 4 cylinder, 145k miles. Recently started making a ticking noise. Noise only happens on startup and for about 15 minutes and ONLY when under load. So, start the car and fast idle ...
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Valves calibration vs fuel economy
My new hobby car (Fiat 126p, 2 cyls air cooled, rear mounted) is not doing correct fuel economy. Spark plugs looks ok. Fumes, at cold start are black but as it warms up, it looks ok. The only ...
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Burned valve Ford Focus 1.6 16v (2010)
and thanks in advance for your help.
I have Ford Focus 1.6 16v 2010 model bought brand new.I"v had installed an LPG gas system "Lowato" from the beginning almost,and never had any problems with the ...
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Will alien component found in new engine tear down effect valve behaviour?
OMG, I might have found the cause of a misfire in cylinder 1 that has been the bain of my life on and off for 3 years.
I have a 1979 sherpa van with an austin/leyland "o" series engine. The ...
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Is it possible to test an exhaust system for a restriction without dismantling it?
I've had an overheating problem with a new/other engine (1991) for 3 years now. Some time back I discovered that there was a misfire on cylinder 1 and maybe an intermittent misfire on cylinder 4. I've ...
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Searching for poor burn problem. How to know if valve guides are worn?
I have a Chevrolet 2008 suburban 1500 v8 5.3L, and am looking for a problem that dirties the spark plugs and causes stumbling idle especially when cold. I am suspecting the valve guides are worn, ...
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How to resolve P0456 OBDII code?
What 3 things and in order can I DIY for p0456. Hard start after fueling every time and irregular idle when stopping at lights. P0456 and no other indicator lamps coming on. Didn't replace gas cap.
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Initial reassembly valve leak to be overcome by breaking in
I lapped my valves and got good results testing both off the engine (pouring alcohol in intake/exhaust chambers and waiting to see level unchanged) and on (cylinder leakdown test). However, as soon as ...
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Testing valve grind job that previously leaked
I had a leaky intake valve so I took that cylinder head off to grind it. Before grinding, I tested that it was indeed leaking and that the other two cylinders in the head did not by setting it on ...
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Camshaft valve clearance and fuel consumption
Does the clearance between the camshaft and the top of valve tappets (AKA lifters AKA shims) affect fuel consumption? I am asking because it seems to me like the lesser the spacing, the more the cam ...
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Can too much space between valves and camshaft cause oil in cylinder?
My 2006 Toyota Tacoma v6 is losing profuse amounts of oil although it runs just fine after adding more. I did a comprehensive overhaul several years ago and tuned the valves (ground them and ...
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Is there a special procedure for preparing a new but very old stock engine?
I have a 1979 Austin morris (leyland,freight rover) Sherpa campervan 1979 model 230 with a "17v" "o" series engine 1.7 litre. I am soon to replace the engine with a new old stock (...
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02 Ford Escape valve ticks on first start in the morning
It's only on the first start. If I leave it running after the first start it will take for a while. Possibly forever I'm not sure. What I've been doing is turning it off after a second or two and then ...
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Is it worth it to try to solve a valve problem on my old Volvo?
I have a 1996 Volvo 850 which has some kind of serious valve or piston problem. The mechanic said that there is zero compression in cylinder 2 (its a 4-cylinder GTS). He said he could not see anything ...
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Astra h engine oil consumption
My 2005 Opel astra h (engine code-Z16XEP) has developed some oil loss issue. During autumn months while I've been only city driving, it has consumed very little oil in comparison of what it had ...
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Valve cover gasket; Torquing the cover
I am taking notes on the proper installation of a valve cover gasket. I plan on using Permatex Ultra Black RTV silicone in the process.
One suggestion I read is, after applying the gasket, silicone ...
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How to set cam timing from scratch for Honda RFVC, DOHC, four stroke?
I'm doing a full engine rebuild on an Honda GB250 clubman, RFVC & DOHC four stroke.
I would like to know how to set cam timing from scratch?
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