Timing Chain Replacement

[chip gremillion]

I understand replacing the timing chain is not a huge ordeal. I think I am
going to take a stab at it. I found Summit Racing has the Cloyes double
roller set on their website. Anyone know what gasket sets I will need. I
am thinking water pump and timing chain gaskets. Is that it? I looked
through the GMCMI parts interchange index and could not find reference to
gaskets for the job. Anyone know the correct Felpro or NAPA numbers? I
will replace the thermostat as well while I have the coolant drained out.
Anyone know the specs on the thermostat and gasket?

Thanks in advance for your help

Chip Gremillion
75 Glenbrook

 

[chip gremillion]

Thanks to everyone that replied to my post on replacing my timing chain.
Great advice.

Now I think I have a bigger problem. I have been hearing a noise from the
driver side of my engine (455). Specifically toward the rear of the engine.
It is the same at all speeds, the frequency does go up as the engine revs.
It sounds like a mechanical tick. Tick..Tick..Tick..Tick..Tick I used the
old shadetree trick of the screwdriver to the ear and found the noise to be
coming from the top end of the engine either from the #5 or 7 cylinder. The
PO said he recently had to have one of the heads replaced (I am not sure
which one though). I have read the maintenance manual and come to no
conclusions as to the cause. Any suggestions on how to narrow my search?

Chip Gremillion
75 Glenbrook

 

[chuck blanford]

From: Chip Gremillion
>Now I think I have a bigger problem. I have been hearing a noise from the
>driver side of my engine (455). Specifically toward the rear of the
engine.
>It is the same at all speeds, the frequency does go up as the engine revs.
>It sounds like a mechanical tick. Tick..Tick..Tick..Tick..Tick I used the
>old shadetree trick of the screwdriver to the ear and found the noise to be
>coming from the top end of the engine either from the #5 or 7 cylinder.
The
>PO said he recently had to have one of the heads replaced (I am not sure
>which one though). I have read the maintenance manual and come to no
>conclusions as to the cause. Any suggestions on how to narrow my search?
>
>Chip Gremillion
>75 Glenbrook
>
>

Chip

When I was test driving mine before purchase, it had that tick-tick-tick
sound that increased with RPM. I figured it was a stuck lifter that was not
pumping up (I'm an accountant, not a mechanic). Post purchase, I used a 3
foot piece of garden hose as a "stethoscope" and was able to pinpoint the
noise source as an exhaust leak. I replaced the OEM cast iron exhaust
manifolds with Thorley headers, and the tick-tick is gone.

Chuck
77 Kingsley
North Idaho

 

[bob mclaughlin]

Chip,
That's a classic description of a small exhaust leak. After several years
of trying to fix them, I went to headers. You might want to try the copper
gaskets before going to headers. There's a number of good testimonials
for them.
Good Luck.
Bob McLaughlin

- -----Original Message-----
From: owner-gmcmotorhome
[mailtowner-gmcmotorhome]On Behalf Of Chip Gremillion
Sent: Sunday, February 13, 2000 7:36 AM
To: gmcmotorhome
Subject: GMC: Timing Chain replacement

Thanks to everyone that replied to my post on replacing my timing chain.
Great advice.

Now I think I have a bigger problem. I have been hearing a noise from the
driver side of my engine (455). Specifically toward the rear of the engine.
It is the same at all speeds, the frequency does go up as the engine revs.
It sounds like a mechanical tick. Tick..Tick..Tick..Tick..Tick I used the
old shadetree trick of the screwdriver to the ear and found the noise to be
coming from the top end of the engine either from the #5 or 7 cylinder. The
PO said he recently had to have one of the heads replaced (I am not sure
which one though). I have read the maintenance manual and come to no
conclusions as to the cause. Any suggestions on how to narrow my search?

Chip Gremillion
75 Glenbrook