Well, we just finished a valve adjustment. Lets just say it needed it. Not badly out of whack but "loose".

Anyway, we will retorque the studs tomorrow night and I will see how it is.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NextelBuddy &raquo;</TD></TR><TR><TD CLASS="quote">ui have je pistons and in teh morning when motor is cold my motor sounds lie a diesal motor lol but when it warms up the motor sounds normal with no noise. i have heard je pistons so this more than any other pistons because of a high silicon content</TD></TR></TABLE>

You have the silicon content backwards.

High silicon content pistons, such as the SRP pistons, uses a higher content alloy (4032) which allows you to run tighter piston to wall clearances. It doesn't allow the piston to expand as much. Low silicon pistons, such as the JE's, uses the 2618 alloy which is higher in tensile strength but expands more.

Anyone know what CP uses? Earl?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ladysman &raquo;</TD></TR><TR><TD CLASS="quote">

Are those clips when it was just built or recently?

I am going to order a "Got Diesel" sticker here soon. </TD></TR></TABLE>

thats a recent vid.... It was much louder during its first 1000 miles. It even rattled the dashboard a bit. Now it sounds stock...no more dash vibrations too

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RyanCivic2000 &raquo;</TD></TR><TR><TD CLASS="quote"> Why would it matter if you have sleeves or not?</TD></TR></TABLE> A sleeved motor will have been bored to the proper clearance for the aftermarket piston. If you put a aftermarket piston in a used stock block, the bore size will already be too large for the manufacturer's recommended clearance.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by earl &raquo;</TD></TR><TR><TD CLASS="quote"> A sleeved motor will have been bored to the proper clearance for the aftermarket piston. If you put a aftermarket piston in a used stock block, the bore size will already be too large for the manufacturer's recommended clearance.</TD></TR></TABLE>

Most people bore .010 or .020 over on a stock block when they go to an aftermarket piston though. I went with the .020 overbore pistons and had my machinist make sure piston to wall clearance was within spec.

 

Actually if a built block is done with right with the correct clearances etc... it should sound almost like a stock block.

Have your built block sounding like a disel motor is a thing of the past because of the hight silcon content of pistons, however most piston companies got it right now.

 

What Colin said...I can't remember the last time I built a motor that dieseled. Only happens when the clearances are wrong.

 

I am pretty sure my noise is valvetrain noise. The valves were way loose. Plus the big 59300 cam is known for noisy vavletrain.

I will keep an ear on it.

 

with JE's my motors were a little loud when cold. its hard to tell at times though becuase mty injectors are soo loud

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itr206 &raquo;</TD></TR><TR><TD CLASS="quote">with JE's my motors were a little loud when cold. its hard to tell at times though becuase mty injectors are soo loud</TD></TR></TABLE>

That is half my noise I think. Stockers are noisy.

 

Yeah my motor sounds like a disel and i have a stock cam every D series with pistons sounds like a disel i dunno why. Even my buddies B series with 84 JE sounds like a disel. When i rev the motor up threw trafic it sounds fine. Sometimes im like is this **** gonna blow up or what

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ekb18c &raquo;</TD></TR><TR><TD CLASS="quote">Actually if a built block is done with right with the correct clearances etc... it should sound almost like a stock block.

Have your built block sounding like a disel motor is a thing of the past because of the hight silcon content of pistons, however most piston companies got it right now.</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Suprdave &raquo;</TD></TR><TR><TD CLASS="quote">What Colin said...I can't remember the last time I built a motor that dieseled. Only happens when the clearances are wrong.</TD></TR></TABLE>

That is incorrect. I will use my SRP pistons I installed last summer for an example. I am going to quote what the piston to cylinder wall specs said on the spec sheet that came with my pistons:

"Piston Skirt to Cylinder Wall Clearnace: These pistons are made of high silicon alloy allowing for tight piston to wall clearance. Normal operating clearnaces (SB .002-.0025/BB .003-.0035) are built into each piston based on bore size. (Please note that all import piston clearance should be measured at .0015 to .002) However, some applications such as marine, drag race, nitrous and forced induction may require additional clearance (.001-.003). Filled blocks and endurance engines may also require additional clearances depending upon boost pressure, equipment used and/or length of the race. Please measure clearance one half inch from the bottom of the piston."

Standard piston to cylinder wall clearance is .0004 to .0016 with a service limit of .002 maximum on my D16Y8. Which means when I built my motor to SRP's recommended specs for my application it SHOULD and DID sound louder than stock.

Brad's motor was built by Endyn, I assure you his piston to cylinder wall clearance is what it should be for his application.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RyanCivic2000 &raquo;</TD></TR><TR><TD CLASS="quote">
Brad's motor was built by Endyn, I assure you his piston to cylinder wall clearance is what it should be for his application.
</TD></TR></TABLE>

Even the best motor builders can screw up from time to time,Endyne is no exception

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by D-Man &raquo;</TD></TR><TR><TD CLASS="quote">

Even the best motor builders can screw up from time to time,</TD></TR></TABLE>

No they don't.

 

cool to see that im not the only one who think that his engine sound like a diesel loll !

my D is noisy when cold and not too bad when hot.... thats normal ...

 

Yeah Me and ELSPOOL say its the D series disel motor lol

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Suprdave &raquo;</TD></TR><TR><TD CLASS="quote">What Colin said...I can't remember the last time I built a motor that dieseled. Only happens when the clearances are wrong.</TD></TR></TABLE>

Yep, that usually happens when you stil a set of low quality TRW's or some SRP's in your 350 chevy that jimmy joe at the local machine shop bored .030 over for ya. I just got my motor started up tonight, stock sleeves with 81.5MM JE's and this thing sounds smooth as silk. Can't want to get my new clutch and feed it some boost

 

I wanted to say that the valve adjustment quieted this thing down a lot.
On a good note though is the head studs were checked and they didn't move.


Upon starting it and pulling it out, I notice ANOTHER Fuggin leak!!!
I hate cars.




Modified by ladysman at 8:41 AM 6/17/2004

 

I was unable to read everything because i'm in a hurry but I thought i'de share my thoughts.

Adjust your valves with the engine warm. I know manuals say to do it cold, but try it warm, my sounded much better after doing so.

The piston slap, that should go away after warming up with heat expansion and clearences tightening up.

other stupid things that could cause noise are things like, if you have a lot of carbon build up, there may be a small amount of detonation which could cause that diesel sound.

but like i said i'm in a hurry! Good luck

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chip &raquo;</TD></TR><TR><TD CLASS="quote">

Yep, that usually happens when you stil a set of low quality TRW's or some SRP's in your 350 chevy that jimmy joe at the local machine shop bored .030 over for ya. I just got my motor started up tonight, stock sleeves with 81.5MM JE's and this thing sounds smooth as silk. Can't want to get my new clutch and feed it some boost </TD></TR></TABLE>

Apparently you didn't read anything I said. SRPs are NOT a low quality piston. In fact, they are the high silicon you guys keep talking about that can have tighter piston to wall clearances and sound quieter. HOWEVER, if your motor was built right, extra clearance should have been used for a boosted application and would sound a little noisier while cold.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RyanCivic2000 &raquo;</TD></TR><TR><TD CLASS="quote">

if your motor was built right, extra clearance should have been used for a boosted application and would sound a little noisier while cold.</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RyanCivic2000 &raquo;</TD></TR><TR><TD CLASS="quote">

HOWEVER, if your motor was built right, extra clearance should have been used for a boosted application and would sound a little noisier while cold.</TD></TR></TABLE>

Hum, why the extra clearance?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ladysman &raquo;</TD></TR><TR><TD CLASS="quote">

Hum, why the extra clearance?</TD></TR></TABLE>

Well, the spec sheet didn't give a reason, so I'm not 100% sure, but I would guess it's because forced induction creates additional heat and the pistons would expand more under this additional heat.

The spec sheet for my SRP's also called for additional ring gap clearance for forced induction.

 

Yes, it's because of heat, same with the ring gap!

 

BTW, the vids I posted ealier is a cold engine (water temp is under 50 degrees celcius) Once the water temp reaches 70-80c it much quieter.

But personally, I like the diesel sound...makes it sound meaner. Indiv. throttle bodies makes it sound even more like a diesel