Question about Cars & Trucks

Open Question

4g15 dohc loud knocking from head

Posted by on

Ad

2 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad
  • 26 Answers

SOURCE: 1998 ck2a lancer 4g15 no go. have replaced dizzy, computer and tps. has spark and injector pulse and timing is fine. any help appreciated

the next thing to check is the fuel system.
is there fuel in the system, the tank, fuel lines. is there fuel pressure at the injectors? check the fuel pump electrical system, the fuse, fuel pump relay, fuel cut off circuit. some factory security system have a fuel inhibitor, that disable the fuel pump circuit!

Posted on Sep 12, 2012

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My Mitsubishi lancer 4g15 dohc gdi starts perfectly but sometimes doesn't start at all,I hav now parked it until its fixed,my mechanic suspects the head gasket but I doubt. Wat could be th problem ?


Probably not the head gasket as that problem would be constant.
When it does not want to start, you'll need to figure out if it is a fuel or spark problem to know which system to inspect.

Nov 19, 2015 | Mitsubishi Cars & Trucks

1 Answer

My 84 toyota truck engine 22r has a valve knock. when i start my truck i hear a loud knock coming from the head.do i need to adjust the valves?


check the valve adjust and see if one valve is lower/higher than the rest. The valves are hydraulically adjusted and if the knock is really loud watch for a slight miss at rpm's. The only thing that will give a loud noise is a loose valve seat insert. You may pick it up with a compression test.

Feb 26, 2014 | Cars & Trucks

1 Answer

1998 ck2a lancer 4g15 no go. have replaced dizzy, computer and tps. has spark and injector pulse and timing is fine. any help appreciated


the next thing to check is the fuel system.
is there fuel in the system, the tank, fuel lines. is there fuel pressure at the injectors? check the fuel pump electrical system, the fuse, fuel pump relay, fuel cut off circuit. some factory security system have a fuel inhibitor, that disable the fuel pump circuit!

Sep 11, 2012 | 1998 Mitsubishi Lancer

1 Answer

97 SL2 dohc loud knocking sound coming from engine. sounds like somebody beating inside of valve cover with a hammer. compression checks ok. oil level is good. no obvious problems with cams or lfters that...


you have a ROD knock,,,,the oil level can be good and compression can be good,but the bearing on the rod to crank is shot and now has too much play and is causing excessive play and noise,soon the rod will come out the block and seize the engine,,if its knocking that loud then its too late to fix it,,your gonna have to replace the engine really soon,,,sorry but its normal of the dohc engine to do this usually between 90 to 130k miles they let loose but the single cam dont have this issue

Oct 24, 2009 | 1997 Saturn SL

2 Answers

Diagram of 3.4 DOHC Motor online


Both knock sensors are screwed into the side of the cylinder head between the front 2 cylinders.

Jun 22, 2009 | 1996 Pontiac Grand Prix

1 Answer

My engine knocks loud and Í dont know what to


If the knocking is a 'tinging' sound...valves are shot. The Paseo has an issue with the head getting warped and leaking oil through the gasket, if the oil has been low too often for lengths of time the head heats and warps.
Open the oil cap and feel around inside with your finger (ensure engine is off and cooled first) rub your fingers together to feel for grit which would most likely be valve shavings. This should be easy to find since it's recently had an oil change.
Worse case scenario would be a rod broken but that would be a LOUD knocking/bonking sound and definitely expensive.

Jun 06, 2009 | 1992 Toyota Paseo

3 Answers

Loud knocking in my engine?????


It sound like you dropped valve seat on the head. Did you recently over heat your engine .

May 12, 2009 | 1998 Plymouth Breeze

1 Answer

1998 chevy monte carlo ls 3.1 l , 6 cyl


That white cloud is caused by a blown head gasket, the knocking noise could be, a rod bearing, thrust bearing, somewhere in the valve train. Replace the head gasket and see if it still knocks, and change the oil and filter too. If it still knocks, than you have bigger problems.

Jan 31, 2009 | 1998 Chevrolet Monte Carlo

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

14 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts

yadayada
yadayada

Level 3 Expert

76164 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Randy Ohler

Level 3 Expert

14585 Answers

Are you a Car and Truck Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...