Duramax Diesel Cylinder Head Machining - Serdi 4.5 Valve Seat Machining - JAMSI Online

[@joeblow2675]

Came across your channel just today and I wanted to say I really am enjoying your content. I also had a look at your website to see some background on the business and I'm really impressed with the family owned business. Warms the heart to see father and son working together. Keep it up says this new fan.

[@miffyleslie]

You got the BEST job ever!! Love watching!

[@1973dek]

I liked watching you do valves. I had a friend of mine that was a machinist building race engines and regular engines. He dressed the seats with stones.

[@davidlloyd6045]

I really like watching you work. I appreciate you making these videos they are very interesting.

[@MrsDebbieHoon]

There's a good possibility I made that head. Cool to see repairs being done by hand. Your VS tool looks weird, ours are much bigger but I understand your setup is different.

[@MrEyad1990]

thats how professionals do it . great work .

[@NOTSOSLIMJIM]

Did this on my LBZ at school. Did a light lap afterwards just to dial it in before blue checking.

[@MrsDebbieHoon]

Ordering VGs and VSs is nuts when they're on our floors pretty regularly.

[@thehappytexan]

1/2 a thou is nice work man!

[@jamiedhuskey6643]

Excellent work, love this channel

[@03SABLE]

How much do you charge for this job? I have a Duramax as well and have been thinking about tearing it apart to install studs and new gaskets and having the heads checked/gone through.

[@texnos6593]

Hi. At 7:55 you show the quality and accuracy of the work - a sign of a specialist by measuring the runout of the chamfered to the axis of the valve sleeve. Is the check done for each seat in the same way on one head? What is the beating spread for all the head seats (in the video 0.005mm)? How often do you have to adjust the settings for the air flow to the upper small plate and the sphere - are there special regulators for each point? Or does the centering accuracy of the machine head, giving a seat runout of 0.005 mm, repeat stably and do not change over time?

[@saltysteel3996]

What would you classify the Serdi as? A gantry milling machine? Could it be used for manual milling like a regular Bridgeport?

[@andyjones6361]

I had my heads done on my duramax had a head gasket go bad and my cooling system was pressure was off the chart. So had the heads surfaced and valves done now I’m using oil badly!! So disappointing after all that work!! They replaced a few guides knurled and honed the rest. The shop that did the work was so busy at the time they put on an extra shift. Just wonder if things were rushed a bit!!

[@grumpyg9350]

Fun to watch. Great job. I'd have much confidence, going to this shop.👍👍👍👍👏🏻👏🏻👏🏻👏🏻

[@av8tore71]

Isn't it always bad to stop the insert on the part because it may Chip the insert? I always ran Kennametal inserts on Towas I used to run at a speed shop here in town and if I would stop the spindle while the insert was touching the part is always chip it. These inserts were not cheap

[@williebulletman5217]

Great job I wish I lived near your chop great work

[@akriminal7951]

Love your work, do you have to recess the valves every time you machine the heads, keep the video going there a great help

[@coreymason7320]

I've seen you cut seats out, and weld seats out. Any insight on how you decide which way you remove seats? Any rule of thumb or anything?

[@cranelord]

From what I've gathered it depends on what material the seats are made from. If it's a material that doesn't weld well it gets cut out.

[@robtdougherty]

Great job! from 4:00 to 6:00, it could be the lighting but it looks like the casting could benefit from some bowl port work. Do you think it would be worth it?

[@JAMSIONLINE]

I'm sure it likely could help, but without having had the opportunity to experiment & do proper testing & analysis, I don't have a solid answer :/. In the case of a quick stock valve job to factory spec to get a customers vehicle back on the road, nothing extra is done. Had the customer been interested in us doing more than stock rebuild, we would've been more than happy to though! If that makes sense :)

[@strydyrhellzrydyr1345]

Yeah. My uncle used to tell me about 5 angle... Even 7

[@ryandungy151]

Love your video bro, keep it up.

[@henryarrington3446]

Ask your dad what we used to call valve stem seals. See if he says umbrellas. Lol.

[@alfonsobernabe4291]

Do more duramax stuff it will go crazy

[@tpcoachfix]

Do you have to do anything to the injector tubes?

[@marcs5790]

If the head was cut .010 and the valves were not cut could you get away with a .010 thicker head gasket or do the valve seats need to be cut back the same amount?

[@leftyeh6495]

You just run it. The springs will still pull the valves tight. It's just silly to not have them cut to improve the seal when you're already having the head surfaced.

[@mechcntr7185]

Since each valve seat is grown down to a different depth, do you have to also grind down each valve stem to match appropriately?

[@plkracer]

No, there is adjustment at the rocker arm for certain engines, others had hydraulic tappets that take up some slack.

[@mechcntr7185]

@@plkracer I have only worked on small engines like Briggs...Thx for th answer.

[@plkracer]

@@mechcntr7185 no problem. Some higher performance gasoline engines use shims to set the gap correctly, which is lighter weight than threaded adjusters

[@shotokanjoable]

Some engines installed valve height is absolute , some have a varied tolerance

[@cyranox90]

Nice video you shared 👍🏻

[@donjohnston9554]

Not sure where you're located but if you are anywhere near Warren at Western Truck... he would love you guys.

[@JAMSIONLINE]

We’re in northern Colorado!

[@donjohnston9554]

@@JAMSIONLINE Warren is on UT Western Truck and tractor....He's always complaining about machine shops in his area. Might be something that can help u both.

[@killstrees]

@@donjohnston9554 warren is in north cali, around the cali/oregon border. Thats a long drive for a machine shop

[@TakeDeadAim]

Use K-lines....I've probably saved a few thousand valve guides with liners. NEVER had a single issue. Add to that, in older cars especially, there's zero chance of damage when removing a 60 year old guide. Also, I don't run the SERDI that fast while cutting. I also radius many of the exhaust seats(just another bit in the SERDI) for better flow. Most people don't know that cutting a 5/7/radius valve angle is nothing more than replacing a bit. So if you go to some even halfway reputable shop and they want to charge extra....there is no extra work for the operator.

[@MrsDebbieHoon]

I make these heads. His serdi isn't running too fast at all. Takes less than a minute if not seconds to mill and we produce up to 600 per an 8 hour shift from start to finish.

[@paulcampbell25]

This bro is pro new here but ya !

[@johnsilvers5883]

No need to lap the valves?

[@Stank-b8w]

It’s sad @ 7:59 you put your corrections in text to most likely stop KZbin Certified Mechanics from saying you were wrong.

[@JAMSIONLINE]

Haha I just saw the picky comments coming

[@Stank-b8w]

@@JAMSIONLINE I KNEW IT! It’s a shame keep up the good stuff!!

[@jd-dg9gn]

don't you check recession as you cut?

[@graydonparry1146]

What temp did you hear the head up to? To remove the valve guide?

[@killerwowmaster]

normally you just cut it to a thin wall thickness then drive it out of the bore via a step on the valve side of the head with the air hammer

[@l-whited3ath86]

Pro tip,when machining a valve seat,If you see your not cutting the entire seat at once(The insert only touches one side of the seat) You can open both axles of the machine so it re aligns again,Sometimes it works and you dont have to cut Excessively the seat material. Cheers

[@nazariomadula4353]

can you give me the valve dept of izusu 4HL ,thank you

[@strydyrhellzrydyr1345]

That would be the hardest part for me... Like.. reseating. When not needed... But sometimes. U just have to. For the company. See.. saying that they needed done... Well. Ok

[@hamiltoncooper3603]

Hello there, I would love to learn this trade. Can anyone here direct me to a good starting point?

[@TheOmw2000]

Find a shop local to you, ask for a job in the cleaning/prep department and work your way up. You’ll get on the job training and become familiar with the terms and eventually graduate into machining

[@hamiltoncooper3603]

Blazin Off-road 👍

[@Hermiwalle]

you should check the seal without the valve springs installed.

[@JAMSIONLINE]

If you listen to the video I mention that I do a check right after machining the seats, and the final double check after assembly shown here.

[@Hermiwalle]

Oh ok. Sorry my bad. Great job!

[@DYLANTRIES]

What state yall in? Doing a engine build soon and need work done and see you know what you are doing, thanks

[@cranelord]

Colorado i think

[@strydyrhellzrydyr1345]

Wow.. ok. So that's what a diesel head is like... Obviously not all.. but wow.. what a difference

[@leftyeh6495]

It's like, exactly like, any other 4 stroke overhead valve head. It's just missing the spark plug hole, and has an injector hole

[@raye1784]

ABOUT HOW MUCH DOES THIS JOB COST?

[@garyofnyc]

POP!

[@conniebrinker8070]

Sounds like spindle speed is to fast.

[@jamesbergman4917]

Why do machinists start in the middle of a block or cylinder head? I would think to avoid missing something you would start on one end and finish with the other.