Knocking POS engine.

Sen Sen · #1 04-21-2005, 03:30 PM

: swear:

I just finished spending about $2grand on repairs/mods to my truck and today I heard an oh so sweet knocking noise come from the engine. Needless to say, this caused me to come up with many new swear words. I have read some threads and will be flushing out the oil, this week.
I just wanted to ask if the oil flush doesn't help....What else can i do that wont bust the bank???

BlazerBoyLT98 · #2 04-21-2005, 03:37 PM

Might not stop the knock but you can try Mobil1 5W-30. FOllow the flush directions as you have read in these posts, idle for 45 minutes then drain. Do not rev or race the engine. Stay away from Fram filters as everyone would say and buy a stant radiator cap. What was done in the shop to your truck?

BlazerBoyLT98 · #3 04-21-2005, 03:39 PM

Or should I say what did you do that cost 2 grand and was it knocking before? Or a slight knock?

Sen Sen · #4 04-21-2005, 03:59 PM

no knock at all before, it started today?
$2 grand in Headgasket, headers, fuel pump, had the bumper/grill painted to match the body, new hub and wheel bearing, starter.

Sen Sen · #5 04-21-2005, 05:28 PM

Just wanted to show you guys the diffrence it made in the look.
Before::
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After::
[img]

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BlazerLT · #6 04-21-2005, 05:31 PM

What oil and filter are you using?

How is the oil pressure?

Sen Sen · #7 04-21-2005, 05:45 PM

ac delco filter...
when I start up it runs normal, but after about 5min my oil pressure drops near zero.
As soon as I step on the gas it goes back up. Its kinda hard to tell because the oil pressure gauge is crap it has markers at 0,275,500

BlazerLT · #8 04-21-2005, 07:39 PM

So if you raise the rpms, the knocking goes away?

blazes9395 · #9 04-21-2005, 08:11 PM

When was engine work done to it, how long ago? Does oil pressure come back up right away to normal as soon as you step on the gas? Something might have gotten stuck somewhere causing either a restriction, or maybe the oil pressure bleed off valve on the oil pump can be stuck open exhausting to much oil at idle. Sounds possible since something like a piece of gasket material or debreis can easily get into the engine when the head gasket was done.

Sen Sen · #10 04-21-2005, 08:20 PM

Quote:

Originally Posted by BlazerLT

So if you raise the rpms, the knocking goes away?

no, it gets louder and faster as the rpms go up!

Sen Sen · #11 04-21-2005, 08:22 PM

Quote:

Originally Posted by blazes9395

When was engine work done to it, how long ago? Does oil pressure come back up right away to normal as soon as you step on the gas? Something might have gotten stuck somewhere causing either a restriction, or maybe the oil pressure bleed off valve on the oil pump can be stuck open exhausting to much oil at idle. Sounds possible since something like a piece of gasket material or debreis can easily get into the engine when the head gasket was done.

The repairs were done 2-3 weeks ago, I haven't heard or had any problems with it till today! I can honestly say it ran perfect before the noise started. The oil pressure does go up as soon as i step on the gas.

Thanks for your help in advance!!

BlazerLT · #12 04-21-2005, 09:45 PM

Sounds like the crank is letting go.

Sen Sen · #13 04-21-2005, 10:51 PM

Quote:

Originally Posted by BlazerLT

Sounds like the crank is letting go.

Thats what one of my friends said aswell. I'm going to the shop tommorow. I just hope it doesn't kill my wallet to get this fixed.

thanks for the advice BLT.

BlazerLT · #14 04-21-2005, 10:54 PM

You will practically have to rebuild it.

I would have a look at the local boneyard for a cheaper replacement.

blazes9395 · #15 04-21-2005, 11:32 PM

What makes you think its the crank? He stated the truck was working fine until now.

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