Engine knocking after burn out

GregGnTn

Member
Joined
Sep 4, 2018
Messages
42
Reaction score
12
Points
8
Age
48
Location
Knoxville
I have an 86 Grand National that I just purchased. I just got my car running and I done a burn out and about two miles down the road my engine started making a knocking noise. This is my first Grand National, any help would be really appreciated thanks in advance.
 

CS99

Member
Joined
Nov 21, 2002
Messages
650
Reaction score
22
Points
18
Remove valve covers, maybe broken rocker arm shaft. If not, prepare to pull the motor.

Sent from my VS987 using Tapatalk
 

GregGnTn

Member
Joined
Sep 4, 2018
Messages
42
Reaction score
12
Points
8
Age
48
Location
Knoxville
I have it on video on my phone, but can’t get it to download on here.
 

Chuck Leeper

8/10's of a century!
Staff member
Joined
May 28, 2001
Messages
11,792
Reaction score
1,456
Points
113
Location
Madison, Ga.
Remove valve covers, maybe broken rocker arm shaft. If not, prepare to pull the motor.

Sent from my VS987 using Tapatalk
Also, cut the oil filter open. Use tin snips, etc, so as to avoid hack saw dust contamination.
 
  • Like
Reactions: CS99

gsgnnut

Active Member
Joined
Mar 31, 2014
Messages
398
Reaction score
62
Points
28
Age
55
Sounds like a valve train issue.
 

No disintegrations

Active Member
Joined
Dec 27, 2015
Messages
851
Reaction score
94
Points
28
Age
42
Does the oil shine like glitter? Yikes! And as said what is the oil pressure ?
 

GregGnTn

Member
Joined
Sep 4, 2018
Messages
42
Reaction score
12
Points
8
Age
48
Location
Knoxville
Guys I am all new at this please bare with me, my dash lights doesn’t work no way to see oil pressure, I did take the belt off and then started the car and still has the knocking, the oil looks to be clean, I am in Knoxville Tn does anyone no anyone around that may be able to help ? I plan to go to the bowling green show of course in another car. Thank all you guys for all your help!!!!
 

GregGnTn

Member
Joined
Sep 4, 2018
Messages
42
Reaction score
12
Points
8
Age
48
Location
Knoxville
One more thing I notice antifreeze leaking around the firewall hose ?
 

No disintegrations

Active Member
Joined
Dec 27, 2015
Messages
851
Reaction score
94
Points
28
Age
42
Without the oil pressure gauge, I would clean a drain pan spotless and drop the oil and cut open the oil filter as Chuck said. If the oil was clean I'd put a mech oil pressure gauge and check that next.
The seller may have put super thick oil to hide the noise issue. The burnout shined daylight on the problem possibly. Not for sure but a possibility.
 

rag231

Well-Known Member
Joined
Apr 30, 2005
Messages
1,417
Reaction score
129
Points
63
Location
Charlotte, NC
If it is valve train you can probably localize it to one side or the other. If you do narrow it down to the crank area , please check your torque converter bolts as well. Don't get too discouraged, we've all had our episodes with these cars. I've done a burn out in front of my parents before and had 2 pushrods fall in the motor. I once had an engine knock, removed the oil pan, checked 2 sets of rod bearings just to realize when I rotated the flexplate and torque converter that there was only one bolt holding it on and it was hitting the block. You are only about 4 hours away from RCG ( Richard Clark's Garage http://richardclarksgarage.com/index.html ) and they can fix anything concerning your car.
 

Steve V

Steve V's Automotive 757 560 2782
Joined
Jan 5, 2004
Messages
4,055
Reaction score
401
Points
83
Age
43
Location
Elberon,Va
Pull valve covers, if nothing obvious pull it , it's in the bottom end:( My contact info is in my sig recheck out if i can help, even on weekends!
 

85tr

Member
Joined
Aug 7, 2008
Messages
406
Reaction score
23
Points
18
Location
Tacoma wa
Sounds to me like it’s coming apart soon for a rebuild.
 

rag231

Well-Known Member
Joined
Apr 30, 2005
Messages
1,417
Reaction score
129
Points
63
Location
Charlotte, NC
If the shaft isn't broke it sounds like the bearings in it are gone. GregGnTn, remove the MAF hose at the turbo inlet and see if the turbo blades free spin.