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Author Topic:   Labor knocking...
jammin
Administrator
posted December 25, 2000 07:58 PM
Guys, I just put a new 383 in my suburban that has been sitting in my shop around 6 months.....it has a little bit of old gas in it. Cranked up the new motor today which is a 9.6 to 1 383.....It sounded like a 6.2 liter diesel engine....I backed the timing back down to 7 degrees..but it is still labor knocking really bad....will that old gas cause that? I am scratching my head..I have never had one labor knock this bad...it really sounds like a diesel.......The cam in the truck is installed straight up and is just above a stock grind. The motor seems to run good...doesnt miss...just labor knocks like crazy.....I thought it was a spun bearing at first..but it is consistent throughout the motor.....I knew that I would be feeding this thing extra unleaded, but never thought it would labor knock that bad on reg unleaded....

Anyone got any suggestions or had this happen to them?

Jammin


x13jc
Member
posted December 26, 2000 04:20 PM
should have traded it on a DODGE! LMAO!!!!

------------------
RACERX


4ord
Member
posted December 26, 2000 10:58 PM
Thanks for the replies guys...I would have gotten back sooner, but I have not had power for 3 days.....umm.....I found part of the problem....crankshaft was hitting the oil pan....not enough clearance...get the big hammer out....he he....I still hear a little, but this was the main sound that was coming off...I think everything will be ok...I appreciate your input.

jammin


awkwardjeff
Member
posted December 28, 2000 07:51 PM
Jammin, I sold a guy a 406 for his 65 Elcamino about 3 years ago, I told him to take the tranny out with the motor.......well he left the tranny in and then when the bell housing on the tranny wouldn't clear the block he had the motor held in place with a floor jack.......well he finally called me and I set him up with the right bell.......then he called the next day to say the motor had a knock inside.....
well, you guessed what happened......he bent the bottom of the pan in about 3/4 inch...
I put a new pan on for him........but I never sold him another thing...........
Just thought this would help put a smile on your face..........and maybe wipe the egg off.
Say warm down there.........it's a high of 10 above for us .........Jeff


jammin
Administrator
posted December 28, 2000 08:35 PM
I know what you mean jeff...I did not thinkI would have a problem with this new pan....i was told I wouldnt anyway..LOL...I didnt even check it before I put it in....I guess that is what confidence gets you. I am glad its in my puller and not in my race car...LOL


Racer 111
Member
posted December 30, 2000 09:25 PM
I had some TQ converter bolts bottem out once,they were barely to long but the flywheel and TQ had a hairline cap between them.Knocked like crazy.


jammin
Administrator
posted December 30, 2000 11:07 PM
Well...I got it fixed today....I can still hear some slight labor knocking, but I am sure that is gas....I think it will be fine. I just have to get it up there and get some premo in it. If you haven't checked those one piece pan gaskets out, I suggest you do so....boy they are sure easy to install.....


awkwardjeff
Member
posted January 05, 2001 10:26 AM
Jammin, this pan gasket works great for a motor you dont intend on pulling the timing cover off with the pan in place.
We have all done this when we are in a hurry to change cams or cam timing and not pull the pan down........this gasket will give you fits if you try........being this is a racers page I wanted every person to know jammin was not workin on a race motor.


jammin
Administrator
posted January 05, 2001 10:36 AM
Thanks for clarifying that Jeff...LOL...I am trying to get all this stuff done...had to do a hurry up motor for my puller. I think it will be fine. I still had some slight noise, but it has virtually gone away....I haven't built a hydraulic motor in a long time.......LOL...kinda fun every once in a while. Yep...I dont suggest using these gaskets on a race motor for that reason. I think they are great on a stocker your going to run a long time, but I wouldn't on a race car motor. Thanks for all the input guys, I appreciate it.


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