Allpar Forums banner

Water Pump Noises?

7710 Views 8 Replies 5 Participants Last post by  offroaderdodge
Hi, I'm new to this forum. I'm hoping that somebody can help me on this one.

Could a water pump make a knocking noise, but only for a minute during a cold start? I've got a 2007 Base Model PT with 2.4L NA engine with 88,000 miles.

The first time I start the car in the morning, I hear a very light knocking noise (my wife probably wouldn't even notice it). It only lasts for about a minute and then it's gone. It will do it again if I let the car sit for a while, maybe 5 hours or so. The weather around here is 20 - 40 degrees F.

I have changed the oil every 2-1/2 to 3 months (about 3,000 miles) using semi-synthetic 5W-30 oil. I've used Castrol GTX, Valvoline, Penzoil during this period. I only recall hearing this noise over this winter, about 2 - 3 months maybe.

I know the water pump, timing belt, etc. are due around 100,000 miles. I was hoping to get them done next year, since I'll be around 100,000 miles. I also need shocks, structs and possibly tires, but don't really have the money for all of it. Just did thermostat, thermostat housing, upper and lower motor mounts, both control arms, ball joints and sway bar bushings.
1 - 2 of 2 Posts

· Super Moderator
1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
Joined
·
17,292 Posts
It doesn't sound like a water pump-type noise. If it is from this area, you may want to locate the noise source by safely supporting the right-front of the car and removing the splash shield. You can then listen and locate the noise better. Diagnose first.
 

· Super Moderator
1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
Joined
·
17,292 Posts
The evaporative vapor purge solenoid also pulses a duty-cycle and may be heard at some times and not others. You can feel the 'heartbeat' by placing your fingers on it while hearing the noise. This is often confused with a lifter noise. Locate it with your underhood vacuum map.
 
1 - 2 of 2 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top