Bad Lifter?
Thread Starter
On The Tree
iTrader: (6)
Joined: Jul 2009
Posts: 188
Likes: 0
From: Mars Hill, North Carolina
Bad Lifter? Got a 98 Trans Am and it hold oil pressure great when normal driving but when I go WOT for more than 5 sec oil pressure drops to zero and lifter starts rattling on left side of engine.. After turning the car off for a min or so it will regain oil pressure back to normal and all is fine.
Like I said above if you are just normal driving oil pressure is fine, would bad Lifter (collapsing Lifter) be a problem? Car has 144,000 miles runs 5-30w oil. I haven't owned it long at all, previous owner said new oil pump was installed also, but it was probably a stock one and could it have maybe been put in incorrectly? The car is bone stock at the moment from front to back, when looking for a car I was just looking for a clean slate to start with
Thanks!
Like I said above if you are just normal driving oil pressure is fine, would bad Lifter (collapsing Lifter) be a problem? Car has 144,000 miles runs 5-30w oil. I haven't owned it long at all, previous owner said new oil pump was installed also, but it was probably a stock one and could it have maybe been put in incorrectly? The car is bone stock at the moment from front to back, when looking for a car I was just looking for a clean slate to start with
Thanks!
It occurs to me that the lifter noise is probably due to loss of oil pressure and not the cause of it. Are you sure you are not low on oil? You may have an oil pump, pickup, pan problem still.. I think it is possible the pump is starving under acceleration(oil rushes to back of pan and pickup not getting it somehow?) and causing this issue. What if you go WOT and don't let the RPMs Get above say 3K? Is it any different then? (like is this WOT or acceleration or RPM issue or all of the above?)
Just food for thought.
Good luck with your issue.
Just food for thought.
Good luck with your issue.
Thread Starter
On The Tree
iTrader: (6)
Joined: Jul 2009
Posts: 188
Likes: 0
From: Mars Hill, North Carolina
Thanks for reply, I had just changed the oil and it was spot on. They I went to the Track about 2-3 hours later. It only does it under hard hard acceleration, driving around town and getting on it a little oil pressure does nothing and is fine. But the moment you got WOT for any length of time oil pressure pegs zero. Given I have only done this once because I am scared of hurting the engine under these circumstances.
After much thought, I think I agree with you. I think it maybe a pickup/pan/pump problem. See bad thing is I don't know what the guy replaced, he could have just put a pump in the car and not anything else. I will probably just replace oil pump, pickup, ect again just to be sure and this time put in a GMPP/SDPC Blueprinted & Ported LS Oil Pump that way I know its done correct. As we know you cant trust anyone these days
After much thought, I think I agree with you. I think it maybe a pickup/pan/pump problem. See bad thing is I don't know what the guy replaced, he could have just put a pump in the car and not anything else. I will probably just replace oil pump, pickup, ect again just to be sure and this time put in a GMPP/SDPC Blueprinted & Ported LS Oil Pump that way I know its done correct. As we know you cant trust anyone these days
Teching In
Joined: Jun 2011
Posts: 44
Likes: 0
From: LONGVIEW, TX
