Author Topic: Possible Rod Knock (Read 2810 times)

JohnHalladay · « **on:** Apr 27, 2008, 08:02:07 PM »

ok so started my truck up today to find out what the knock is in my new 22re. when the truck was runnin i pulled the #1 plug and the knock was still there. i put the plug back in. then i pulled the #2 plug and the truck died. then i put the plug back on and started it again. then i pulled the #3 Plug, know was still there. so again i put the plug back on and then i pulled the #4 plug and the truck died again. so now it dies whenever i pull the #2 or #4 Plug. i know its a internal knock. but can it be a bearing? the motor is shakes a ton when its in the truck and the motor mounts are tight. so i dont know. what do you guys think about this one???

KDXSR5 · « **Reply #1 on:** Apr 27, 2008, 08:05:16 PM »

Umm... the fact your truck is dieing when you pull off a plug wire and shakes really bad indicates you have a problem with fuel, spark, compression, or air on at least one cyl. I have tried to kill my engine before, and I could keep it running on 1 cyl, so you have another problem besides your knock.

79coyotefrg · « **Reply #2 on:** Apr 27, 2008, 08:33:46 PM »

you have a "miss" not a "knock"

JohnHalladay · « **Reply #3 on:** Apr 27, 2008, 08:41:06 PM »

whats a miss? can you explain it to me...? i will apprecate it!

KDXSR5 · « **Reply #4 on:** Apr 27, 2008, 08:47:41 PM »

Exactly what I posted, one or more cylinders are not firing. You have some trouble shooting to do.

Willy Mammoth · « **Reply #5 on:** Apr 27, 2008, 08:51:10 PM »

Try switching #2 and #4 wires and see if that does anything. Strange that those two will kill the engine. They may be crossed.

Edit: #2 and #4 are running, it's #1 and #3 that are not.

JohnHalladay · « **Reply #6 on:** Apr 27, 2008, 08:53:10 PM »

ok but can a "miss" cause i knock or make a knock?

79coyotefrg · « **Reply #7 on:** Apr 27, 2008, 08:56:20 PM »

miss= engine miss-fire aka that particular cylinder is not producing power, this can be caused by a bad spark plug, a bad sparkplug wire , a bad fuel injector(less likely) , bad rings (less likely) or a bent valve

you need to run a compression check and see what the compression is on each cylinder
compression testers can be bought at any parts store for $20

remove all spark plugs then screw in the tester hose, attach gauge hit the starter and let the engine spin freely a few revolutions
write down the results (good is 120 plus-170 psi)

then repeat on all 4 cylinders

post your results

if you remove the spark plugs and find a dirty plug that might be your trouble

removing the plug wire and it not making the engine die tells me that cylinder was bad

79coyotefrg · « **Reply #8 on:** Apr 27, 2008, 08:57:53 PM »

Quote from: JohnHalladay on Apr 27, 2008, 08:53:10 PM

ok but can a "miss" cause i knock or make a knock?

a knock is a metalic WACKA WACKA WACKA , thats usually followed by a BOOM and lots of oil on the ground

JohnHalladay · « **Reply #9 on:** Apr 27, 2008, 08:59:33 PM »

ok so ill do a commpression test 2marrow and ill post the results on here.

KDXSR5 · « **Reply #10 on:** Apr 27, 2008, 09:00:26 PM »

Quote from: 79coyotefrg on Apr 27, 2008, 08:57:53 PM

a knock is a metalic WACKA WACKA WACKA , thats usually followed by a BOOM and lots of oil on the ground

or maybe a rod through the block

JohnHalladay · « **Reply #11 on:** Apr 27, 2008, 09:57:19 PM »

ok... but i am deffinatly hearing a knock in the engin. and the knock speeds up when i hit the throttle. but it hasnt shot through the block yet. its just sitting in my driveway. i havnt drove it yet with the new motor. so i guess what im trying to say is i dont know were the knock is but theres a deffinate knock. and its not a lil tick. you can hear it pretty well! lol

so one more quesion. whats a spark plug suppose to be gapped to?

KDXSR5 · « **Reply #12 on:** Apr 27, 2008, 09:58:57 PM »

you have a bad knock on your rebuilt engine? I would suggest not running it anymore and taking it back apart to figure out what is wrong. Anyone else have a suggestion?

JohnHalladay · « **Reply #13 on:** Apr 27, 2008, 10:00:30 PM »

no i have a knock in a new motor!!! lol

KDXSR5 · « **Reply #14 on:** Apr 27, 2008, 10:05:12 PM »

who rebuilt it? you? or did you buy it from a company? If you bought it from a company, call them and get it figured out. If you built it, you need to pull it back apart and figure out what is going on. A knock is never good on a "new" or rebuilt motor.

79coyotefrg · « **Reply #15 on:** Apr 28, 2008, 07:22:32 AM »

pull the oil pan and see if any of the rods or main caps are loose at all

JohnHalladay · « **Reply #16 on:** Apr 28, 2008, 08:05:21 AM »

ok so im going to pull the pan today and check if anything is loose. and should i still run the compression test?

i bought the motor new from Cylinder Head Specilists. so im also going to call them cause the motor has a 7 year 70,000 mile warrentry but they are being a bit** about giving me a new motor. so i think i might just get my money back and go somewere else if it is a rod knock for sure.

Willy Mammoth · « **Reply #17 on:** Apr 28, 2008, 08:08:57 AM »

Make sure they are OK with you pulling the pan. They may try to void your warranty.

JohnHalladay · « **Reply #18 on:** Apr 28, 2008, 09:22:39 PM »

Ok so i called the place i bought the motor from and they told me to bring it into them on an engin stand and there going to inspect it.

I was woundering if anyone needed pics of anything while pulling a motor. cause im pulling my wendsday and if you guys need some pics of anything let me know!

79coyotefrg · « **Reply #19 on:** Apr 29, 2008, 04:33:50 PM »

nah im good but it never hurts to take pics so that you have them when you go back in with it

JohnHalladay · « **Reply #20 on:** Apr 29, 2008, 09:28:24 PM »

yea good call on that one. i got everything riped off the motor today. and all the motor monts off so 2marrow i just have to pick up a cherry pick and pull it out.

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