rod knock starting

funvtec

NAXJA Forum User

Location

oak creek, WI

• Sep 11, 2008

• #1

well my 88 has about 170k on the clock and its begining to get a slight rod knock. i've only owned it for the last 10k or so and have done all types of maintenance stuff. just curious as to how i can prolong the life of the engine for as long as possible? are there any tips out there? i know to keep the oil changed and to keep out of the skinny pedal. anyone have any other secrets?

TIA

 

P

poorboy_616

NAXJA Forum User

Location

Vancouver, WA

• Sep 12, 2008

• #2

Check your oil pump, They are infamous for failing at around 150,000 Miles....

 

C

cherokee chuck

NAXJA Forum User

Location

freeland,wa usa

• Sep 12, 2008

• #3

Rod knock or is it piston slap? 4.0 engines can run forever with piston slap.

 

8

89xj

NAXJA Forum User

Location

aston,pa

• Sep 12, 2008

• #4

if it only knocks at idle, its fine. if it knocks under load while accelerating, than there are problems.

 

funvtec

NAXJA Forum User

Location

oak creek, WI

• Sep 12, 2008

• #5

i'm pretty confident its rod knock. its not bad yet but i can hear it at idle, and when i'm going through a fdrive through. i cant hear it when i'm moving so its not horrible yet.

i'm hoping to make it through winter but i'm not sure this thing is worth an engine swap.

 

8

89xj

NAXJA Forum User

Location

aston,pa

• Sep 12, 2008

• #6

have you ruled out loose flexplate bolts as the knock you here?

 

R

REPOXP777

NAXJA Forum User

Location

Naples Fl

• Sep 12, 2008

• #7

If you are SURE it is a rod knock , pull the pan and change the rod bearings . Before I would attempt this I would check the oil pressure with a mechanical oil pressure gauge to make sure it has oil pressure . You may want to install a new oil pump while you have the pan off . This if done correctly should get you through the winter , as long as the crank is not to roughfed up .

 

O

oldmustangjunkie

NAXJA Forum User

Location

Wartburg, TN

• Sep 12, 2008

• #8

I'm interested in this thread. My Jeep has a barely discernable knock at idle. I don't know if it is a rod or not since I'm holding 30-40psi at idle warm. It could be the noisy valvetrain or the exhaust leak also.

 

funvtec

NAXJA Forum User

Location

oak creek, WI

• Sep 12, 2008

• #9

89xj said:

have you ruled out loose flexplate bolts as the knock you here?

Click to expand...

that i have not.

i'll crawl under it this weekend and get a better listen.

thanks guys