loud knock from head

[wicked740]

I am havein a knock come from the front head.but it only does it when car is on not at all while car is cranking. Anybody know what it would be?

 

[yamahaSHO]

Does it sound like this?

[youtube]vl_IR9LAWsc[/youtube]

 

[shoreracer92]

i've had a knock since i bought the car (10k ago) and it comes from the front head area. doesn't quite sound like that though. it doesn't happen when i do the KOER test, so i figured its a injector rap... just sayin. and theres a few posts about knocks on here... search alil bit.

 

[wicked740]

No its realy loud and from the front right and there is no pauses

 

[wicked740]

Also I have the front three plugs out and I can only turn motor half way then locks up so I bubump the starter and can do another half turn before it locks up agine

 

[Irish Pride]

Is it an ATX? Could be a failed timing tensioner. I just went thru that last month.

 

[wicked740]

No its mtx! I took off intake and found a small hose clamp in the front midal intake valves.i found both peices but did not find the screw for it but all valves seem to be good. U guys think I will have to pull the head or is the block going to be messed up

 

[jayro]

No its mtx! I took off intake and found a small hose clamp in the front midal intake valves.i found both peices but did not find the screw for it but all valves seem to be good. U guys think I will have to pull the head or is the block going to be messed up

You could pull front exhaust manafold to see if it gives you better access to different areas in the head. Though pulling the front head is fairly easy.

Have you tried fishing with a magnet yet?

 

[Blackdr16]

Rod bearing

 

[wicked740]

I have allready pulled front maifold and did the magnet down in the sparkplug well on top of piston and on intake and exsuaut valves. Is there an easy way to check the rod b cause im dissabled and have 8 screws in my back so,any help will be awsome.

 

[jayro]

Not Easy, but not hard. You can get to them by pulling the oilpan. Then you unbolt the girdle and oil pickup tube. At that point you are staring at the crank and rod caps. Undo the caps and check the bearings.

Of course you have to remove the y-pipe to get to the oil pan, but if you have the manafold off then the y is already off.

 

[wicked740]

Would there be signs of rod b like metal shavings in oil pan? And also if it was rod bearing wouldent it make sound even when cranking not just car on. How do you put videos on here I will try to make a video for you guys.so you can hear it

 

[auto.guru]

Would there be signs of rod b like metal shavings in oil pan? And also if it was rod bearing wouldent it make sound even when cranking not just car on. How do you put videos on here I will try to make a video for you guys.so you can hear it

as being a leader of throwing rod bearings.... yes, you will have a crap ton of copper and aluminum looking shavings in your oil. just drain your oil first - and use a coffee strainer. If you have a bunch of particles then there is no point to pull the pan. its obvious you threw a rod.

otherwise.... start the car and start pulling spark wires as the car is running. if the noise goes away thats your trouble cylinder and more than likey its a rod bearing. if it doesnt go away - that screw is probably bashed into the piston top and its smacking the cylinder head

 

[wicked740]

Ok thanks ill try that tomarrow. But I got to thinking about it I need to,start it and make sure its coming from the front front head cause my two other shos ive had both had the diff failure and the knocking sounds like that

 

[auto.guru]

Well pulling your wires will determin the source. If all wires pulled and it doesn't go away, its not in your rotating assembly.

And the diff doesn't turn unless your in gear I believe.

 

[wicked740]

Well I pulled off the wires with car on and nothing changed so I pulled the head off and the screw was stuck to the head between the valves they seem to be fine is the indent on the piston going to hurt anything there isent any damage done to cylinder just small spot on top of piston and the spot on the head

 

[sperold]

Put it back together. If nothing is smashed with cracks radiating from it, it will be OK.

 

[wicked740]

Cool thanks alot guys waitin for headgasket and then its going back together no cracks just a indents

 

[wicked740]

Anybody know how much to torq the head?