Timing chain slap on start up

[HigherPowered]

I am getting a horrible almost dieseling valve noise on start up. Its an 04 with 78k on the ticker. Other than that it runs like a BEAST!! This is my first mod motor car so I'm in the dark..Please help

[Rocknthehawk]

And you still drive with it like this? :depress:

Sounds like the same problem my brother had....

except he has a replacement motor now.

i would get it looked at by a mechanic ASAP

[baltimoremm]

search for "clatter at startup" or something similar. i remember a couple of threads addressing this

[CKMustangCobra]

What car?

The timing chain tensioners are oil pressure activated. Maybe switch to a thinner oil and use a good filter (Mobil 1) will help your situation.

I had a 93 Mark VIII with this issue. Switched to 5W-30 and Mobil 1 filter.... problem stopped.

[HigherPowered]

The vehicle in question is my 2004 Marauder with 78k

[merc]

Timing chains don't slap on a 4v mod motor. It may become loose if the tensioners are bad. What you are hearing is most likely value chatter.

[2,4shofast]

Also check to make sure it isnt the belt tensioner slapping against the timing cover. I found out that was the problem with mine at start up, a new tensioner only runs about $35, however I replaced mine at it will still hit sometimes on start up:mad2:

[Marauderjack]

If the oil is draining back for some reason.....like in an oil change with a dry filter....you might be hearing a little piston slap??:cool: Won't hurt a thing if that's the case!!:beer:

Marauderjack:bandit: