Took the HEAD OFF today..PICTURES*****

[RVTRKN]

I know nothing about the internals of the 5. 9 but shouldn't the exhaust be bigger?

 

[Forrest Nearing]

generally exhaust valves are smaller than intake

 

[nickleinonen]

generally exhaust valves are smaller than intake

yep, that is very true on gas engines, but from what i have seen in 4 valve diesel heads, there is very little size difference [compared to gassers] between the intake and exhaust valves. .





this pic shows the valves in a ge fdl cylinder pack. in & ex. almost identical in size... the bore is about 9. 5"

 

[Forrest Nearing]

yep, that is very true on gas engines, but from what i have seen in 4 valve diesel heads, there is very little size difference [compared to gassers] between the intake and exhaust valves. .





this pic shows the valves in a ge fdl cylinder pack. in & ex. almost identical in size... the bore is about 9. 5"

exactly... he asked shouldn't the exhaust be bigger... no... it's already very large compared to most engines where the intake valve/valves are larger than the exhaust

 

[HoleshotHolset]

Dad blew the OEM head gasket in his 12-valve about a week ago (370's/022's, 21° timing, water/meth, 150k miles = for the head gasket :-laf ). The HG had spots on just about every cylinder where the fire rings were a bit leaky...



His pistons also had very minor impressions from the intake valves. He runs a PDR cam and had all OEM valve springs.



He got it fired off yesterday and he's now running a stock Cummins HG, ARP 12mm studs, HD springs, o-rings, and I told him to back off the timing a bit (to make it easier to start in the MA winters for snowplowing more than anything... ).



Matt

 

[Vaughn MacKenzie]

Yeah!! :-laf :-laf



Hand held scotch brite pads and wd40.

jwilliams3 one word of caution on scotch brite I read once. Someone posted they used to build engines and had lost a few after doing head jobs. Finally figured out it was the scotch brite they were using to clean the block decks with. If you did use scotch brite you'll want to change your oil right away and probably again very shortly thereafter. Supposedly scotch brite fibers go right through filter media and are harsh on bearings. Not sure if there's any truth to this but just passing on something someone posted once.



Vaughn

 

[jwilliams3]

Vaughn,

Thats good advice. I have already planned to change the oil after a very short duration after getting the engine back up and running.



Yes, scotch brite is hard on things and can clog the oil nozzle's but the good thing is that the filter will catch most particles and the oil has to pass through the filter before it gets to the bearings again.



Thanks

 

[Forrest Nearing]

I've always been a razor blade man myself

 

[nickleinonen]

I've always been a razor blade man myself

at work i use an air sander and 3" abrasive discs like below for grinding down gaskets on everything...

#ad




they work well, but headgaskets are never done on our current engines [the new gevo engines have a metal fire ring as the head gasket]

 

[Pmaloney]

Nick- I wouldn't use them in any area that would let the debris into the oil. GM released a bulletin a few years ago about the 3M scotch brite type pads and the fact that the grit will pass through an oil filter and make short work of the bearings. They also released one saying not to use the "bristle wheels" that 3M also markets. I personally have seen two engines wind up with rod knocks from these pads. Take that for what its worth.

 

[nickleinonen]

that the grit will pass through an oil filter and make short work of the bearings

on my own engine i would be careful.



but on the old beaters i work on at work, you should see what i find in the engines. . i have found flashlights, sockets, ratchets, main bearings, con rod bearing, nuts, bolts and even a hardhat once... i have taken those 3" discs and used them to clean up a damaged crank so it could be put back into service. the emd and ge engines i work on can take quite a beating. when those engines get a water leak that goes into the air box, the borate-nitrate we use in the water treatment drys into almost sand... that grinds the liners pretty badly. .

 

[lmills]

yeh, but Nick... ... the engines you work on are a weeeeeeeeeeee bit bigger than ours.

 

[nickleinonen]

yeh, but Nick... ... the engines you work on are a weeeeeeeeeeee bit bigger than ours.

yeah... one cylinder is 1. 7x-1. 9x larger than our lil isb's total capacity. . i like big

 

[mconstable]

Your the 2006 XCumminsX

LMAO!! I had forgotten all about that kid, Christ he was annoying! (but amusing... lol)

 

[JStieger]

LMAO!! I had forgotten all about that kid, Christ he was annoying! (but amusing... lol)

I think he's baaaaaacck! Here:



http://www.dieseltruckresource.com/dev/showthread.php?t=119428

 

[WDimig]

oh thats him alright! :-laf



wes

 

[Luken]

Which one is it? The guy who started the thread? I wasn't around for the xcumminsx around here LOL

 

[JStieger]

Yup - it's the guy who started the thread. Do a search on member xcumminsx here... you don't need soap operas and the comics (every day) after reading his posts!

 

[rivercat]

Next year I will pull mine also just to see what has happened in the last 30+K with the abuse I threw at it.

Jim

That Will be a Good day, Can't wait To see what 800+ does to one.

 

[rivercat]

The HG had spots on just about every cylinder where the fire rings were a bit leaky... Matt

Pics just got my leaky HG off and want to compare.