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-   -   Knocking upon start up (https://www.jk-forum.com/forums/stock-jk-tech-12/knocking-upon-start-up-14063/)

cmpmacchia 10-19-2008 06:29 PM


Originally Posted by TINMAN080 (Post 745377)
The FRAM will cure what ails 'ya....... your anti-drainback valve in your filter is letting the filter empty out between starts. The Fram will cure it.:D

TINMAN080 is right on the money. Change to fram and no more knock, knock, knocking!:

Monty- 10-20-2008 09:04 PM

i think i know what i'll be doing tomorrow. good info guys.

rickc309 10-22-2008 01:51 PM

I had the problem until I went to a Fram filter, no more dry starts.

tibbar 10-22-2008 06:20 PM


Originally Posted by simon (Post 381160)
Not sure if anyone can hear me, but TIGHTEN YOUR EXHAUST MANIFOLD BOLTS!
I don't mean to yell, but I bet you that is the problem.

Thanks, will check this out

KMHENRY77 10-22-2008 06:44 PM

Wix
 

Originally Posted by husker_shoe (Post 529066)
this is usually due to the anti-drain back valve on the oil filter. Try switching oil filter brands. I always runa Wix filter and have never had this issue

I always use WIX filters and I don't have any problems. Cheap filters or slapping a Mobil name on them does nothing but destroy your engine.
I got on to WIX filters during my early years when I worked on a pit crew for a Funny Car. We always used WIX and they held up.

Tuto 01-24-2011 02:38 PM


Originally Posted by Chrisbuilt (Post 381607)
Mine has always done it if its left for more than 12 hours. I had a brain fart and thought it might be cause by a hydraulic lifter bleeding down. Goes away after a few seconds and some new oil pumped into the lifter???? Are they even hydro lifters in the 3.8?

I would like to know. My JK w/ 5000 miles 2 oil changes has the dry starts in the moning . Change filter to K&N but the dry start continues but is less.

jeepoholic 01-24-2011 02:51 PM

Go figure, I use the best motor oil (Royal Purple) and oil filter (K&N) the engine knocks at start up (5 oil changes). I just switched to Valvoline synthetic with a mopar oil filter it stops!:dontknow2::thinking:
What the heck?

tw!sted 01-24-2011 07:40 PM

Mine does it, I started another thread on here awhile back and tried about 6 filters thinking it was the Anti-drain back.. While some filters did the ticking worse then others, I finally narrowed it down to temperature thing. Any temperature in the low 30's after sitting overnight and I get the ticking.

When its above 35F it wont get the ticking and I have let it sit 3-4 days before.

Strange issue..I have a feeling they all do it, but most just doesn't notice it, live in warmer climate or have heated garages. I don't have any type of knocking only the ticking.

Found this video on youtube of the sound -
http://www.youtube.com/watch?v=Cr9-UgiCE2g

Tuto 02-02-2011 10:36 AM


Originally Posted by tw!sted (Post 2054993)
Mine does it, I started another thread on here awhile back and tried about 6 filters thinking it was the Anti-drain back.. While some filters did the ticking worse then others, I finally narrowed it down to temperature thing. Any temperature in the low 30's after sitting overnight and I get the ticking.

When its above 35F it wont get the ticking and I have let it sit 3-4 days before.

Strange issue..I have a feeling they all do it, but most just doesn't notice it, live in warmer climate or have heated garages. I don't have any type of knocking only the ticking.

Found this video on youtube of the sound -
http://www.youtube.com/watch?v=Cr9-UgiCE2g

I'm in South Florida - temperature in the 60s (winter here :bleh:) and I get the dry starts -:dontknow2:


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