85 Cad 4100

I Have Received Different Answers From Different Knowledgeable People When I Ask The Question Of:

Do I Need To Replace My Head Bolts When I Put The Head Back On My 1985 Cad Cpe Deville 4100 Engine??????

I Have Worked In Gm Parts For 26 Years And 2 Years I Worked For A Caddy Dealer But I Don't Recall Ever Selling Or Even Stocking These Bolts.

Anyone Know The Real Answer?

The Factory Service Manual Says Nothing Of Replacing These Bolts

Usually head bolts are replaced after they are removed. I'd never re-use one! It's cheap insurance if they are the original bolts.

The head bolts for the 4.x series engines ARE NOT torque to yield head bolts. They can be re-used if needed without any major problems. This is not the Northstar engine where you need new head bolts and time-serts.

If you're going to re-use the head bolts, make sure that they are not bent by checking with a straight edge and that the threads aren't damaged. Clean the threads on the block and the bolt threads with the proper tools and re-assemble the engine...Check them and if they do check out OK (majority of the time they will be absolutely fine), then they are fine for re-use. If they do check out to be bad, replace them (If replacement is needed, then I would replace all of them as a set) and get that engine back together and enjoy the ride.

Yep, the 4.1/4.5/4.9 head bolts can be reused without a problem. They are not torque to yield bolts at all.

In fact, the Northstar head bolts are not torque to yield, either. The Northstar bolts are specified to be replaced each time the engine is torn down but that is so that the OEM coatings on the new bolts are there, not because the bolts themselves are damaged. The Northstar heatbolts need the microencapsulated loctite products on the threads and under the head of the bolt to act as a high pressure lubricant during rundown and then as a thread locking agent. They cannot be applied in the field so the bolts are considered one-use....but not because they are torque to yield, because they aren't.

When tightening the head bolts; tighten them all the same amount. Then go over all of them and turn the wrench 90 degrees, ALL BOLTS. No specific torque specs required if they are all tightened the same amount.

When tightening the head bolts; tighten them all the same amount. Then go over all of them and turn the wrench 90 degrees, ALL BOLTS. No specific torque specs required if they are all tightened the same amount.

Dude, are you ****ing insane!?!?

If you're going to give advice like this, then might I suggest it be in the lounge so people can take the joke lightly?

When you do this sort of work, especially on an engine that requires precise torque specifications, the you had better do the right thing and torque the damned thing down the right way!!!

OK bud, the mechanic who told me this rebuilds BMW engines with specs that aren't even close to the specific specs of these junk motors. And he is the best in the Entire friggin city. I did a cylinder head on a 2003 Audi A4 3 years ago, and he told me to always tighten that way.

I was told that there are no need for torque specs at all nor routine oil changes or maintenace by a Briggs & Straton mechanic.... must be true for everything....

OK bud, the mechanic who told me this rebuilds BMW engines with specs that aren't even close to the specific specs of these junk motors. And he is the best in the Entire friggin city. I did a cylinder head on a 2003 Audi A4 3 years ago, and he told me to always tighten that way.

Okay bud, and I'll let you in on a little secret: you're full of shit :bigroll:

You were 12 when you did a head job (hehe) on an '03 Audi? That to me sounds like you're trying too hard to supress (or impress) your wounded ego from the egg you laid about the 4.x engine torquing procedure. I am also reminded of the same kid (you) that did a lifter job and thought that the camshaft was still good even after several people said the cam was bad (the pictures you provided were pretty concrete to me): not two weeks later that cam, and therefore your work, was done for...

As for this mechanic, they will say anything to impress stupid children, and he did one Hell of a fine job on you.

And as for you leaving this spoiled egg of advice, I'm can only ask that you think before you type about anything of this nature. Keep giving rotten eggs like the one you just laid will give your credibility around here a shot in the mouth.

Oh, I forgot something: these engines are junk eh? Let's take the 4.9 liter for example: it is known to be the lowest warranty claim engines that Cadillac had in years, even lower than that of the Northstar powered cars. Does your mechanic friend know that? Also, you drive some of this "junk" yet you're the first one to claim that your 4.1 liter is the fastest around. That doesn't sound like junk to me dude!

Another thing is that when you said that you did a head job (haha!) on an '03 Audi 3 years ago, were you part of the warranty service there at the dealership? After all, a new 2003 A4 Audi 3 years ago would still be under waranty, so that suggests that you may have been in the dealship garage, at age 12, helping to rebuid a brand new car...Even with a bad head on it in it's infancy...

And let me ask you this: are you done lying yet?

My dad rebuilds cars, i had to pull the head because when the top plastic engine cover shattered, the plastic pieces got caught between the timing belt and the pulley, which caused a skip and caused the pistons to slap the valves. WTF is waranty gonna cover when my dad bought the car wrecked? BTW, i've worked on cars since i was 9yrs old. My dad has had 5 A4's over the past 3 yrs. These cadillac engines are junk compared to inline 6 BMW engines. I've taken a 4100 apart and put it back together (it still runs with a flat cam) and its a very simple engine, nothing special; and i'm sure the 4.9 is the same. Anyway, i don't wanna argue, and lets just keep the peace. And everything i say on these forums is no lie.

My dad rebuilds cars, i had to pull the head because when the top plastic engine cover shattered, the plastic pieces got caught between the timing belt and the pulley, which caused a skip and caused the pistons to slap the valves. WTF is waranty gonna cover when my dad bought the car wrecked? BTW, i've worked on cars since i was 9yrs old. My dad has had 5 A4's over the past 3 yrs. These cadillac engines are junk compared to inline 6 BMW engines. I've taken a 4100 apart and put it back together (it still runs with a flat cam) and its a very simple engine, nothing special; and i'm sure the 4.9 is the same. Anyway, i don't wanna argue, and lets just keep the peace. And everything i say on these forums is no lie.

When you openly state that you do not have to torque heads down, or pay no attention to the numbers when doing such a job, you are wrong. It's as simple as that. You can claim all of the bullshit you'd like to as to how many Audi's, Bimmers, Cadillacs, or whatever the Hell you claim you and your dad have owned and have rebuilt, but when you claim all of that garbage about how much you've done and to what engine and then state that you do not have to follow the strict procedures for that sort of job, your ignorance shines as brightly as the headlamp of a subway train barreling down a dark tunnel.

So now the car was a salvage huh? That's interesting that all of the sudden you had to back up your bullshit statement when confronted about it. And the fact that your dad supposedly has owned 5 Audis in 3 years seems to be a testament as to which car (and its engine) is really a piece of shit. Why didn't he keep the first one? Perhaps with his backwoods knowledge, he's a rather poor mechanic? :hmm:

I've taken an HT4100 apart and have put it back together, and you know what? I was smart enough to replace the cam in the damned thing when I seen that is was damaged. Placing a warped cam back into an engine is a sure sign of someone who hasn't got the slightest clue as to what they're doing when it comes to rebuilding an engine. The thread you made on it shines this fact very brightly; after being told by several people, myself included, you still ignored the fact that your cam was shot, yet you put the damned paperweight back into the engine! Are those the skills that your dad has been teaching you since you were 9 years old, put a warped cam back into an engine?

Good luck man :thumbsup:

BTW, he buys cars wrecked, then rebuild, then sells them, do you want me to take pics of our shop to prove that? I knew my self the cam wasn't gonna work long, but apperently, my dad didn't belive me when i told him that, and when i told him what you guys said, he didn't care.

Pherhaps, i might have not said that when you torque head bolts down, all you gotta do it torqe them the same amount, which is usually 90 degrees after they have been tightened.

Oh, and most of my friends are mechanics, and most of them build mucsle cars, I don't "chill" with my own age group. And most of the stuff i learned was from the internet, and reading and searching every single part. And then watching and helping rebuild engines and trasmissions.

I was gonna reply, but Mike has been doing an excelent job so far :::waits patiently for the next reply:::

I was gonna reply, but Mike has been doing an excelent job so far :::waits patiently for the next reply:::

And yet all of the engines he has rebuilt, he still makes a thread asking for advice on the engines when he does a lifter job, ignores the fact that his camshaft is wiped, placed said wiped camshaft in the engine, and then he makes another post complaining about that! And he still claims to be an A+ mechanic, at 15 years old mind you...:cookoo:

Oh, and most of my friends are mechanics, and most of them build mucsle cars, I don't "chill" with my own age group. And most of the stuff i learned was from the internet, and reading and searching every single part. And then watching and helping rebuild engines and trasmissions.

So now most of your friends, who are older now (because you don't want us to believe that you're 15 years old by the way you act) are A+ mechanics? Pu-leeze. So what do you spend most of your time on? Reading the internet ( :rofl: ) fpr mechanical experiance, or spending all of that time watching ( :histeric: ) your friends do this stuff?

Sounds a little made up to me; I'm calling a Mccombie on this one tiger!

Pherhaps, i might have not said that when you torque head bolts down, all you gotta do it torqe them the same amount, which is usually 90 degrees after they have been tightened.

Are you retracting from your mistake with another piece of bad advice here? Since you're an expert mechanic ( :rofl: ), why don't you tell us the steps for torquing down the heads on a 4.x liter engine...Seriously, I don't know, so please tell me!

BTW, he buys cars wrecked, then rebuild, then sells them, do you want me to take pics of our shop to prove that? I knew my self the cam wasn't gonna work long, but apperently, my dad didn't belive me when i told him that, and when i told him what you guys said, he didn't care.

So who was arguing when we told you the cam was wiped? Why did you even post a pic of the damned thing if you already knew the cam was shot? Were we actually talking to your dad then, or was it some kid that didn't know what he was doing?

Dude, just stop now before you have to check in to an ego repair clinic, alright? Your bullshit has done you in here, and nobody believes a damned word you say now. I've seen so many holes in your stories here that I actually feel bad for you, so please, just stop your ego before it get really busted up and you slice yourself or something...:helpless:

Yea ok bro. So you think i don't have 3 caddies too?, because two of them are on my cardomain page. Cuz i can easily prove that. And what the hell do i have to do with that Mcombie5 kid? He made up the whole ****ing thing with his family and shit, i'm not makin anything up, i'm typing out what actually is true.

What "holes" are we exactly talking about?

"Are you retracting from your mistake with another piece of bad advice here? Since you're an expert mechanic ( :rofl: ), why don't you tell us the steps for torquing down the heads on a 4.x liter engine...Seriously, I don't know, so please tell me!"

Ok, i will.

Torque Bolts in 3 steps: First torque all bolts to 38 ft. lbs. Second-Torque all bolts to 74 ft. lbs. Third-Torque bolts 1,3 and 4 to 90 ft. lbs.
Going in sequence
6 3 1 4 5
10 7 2 8 9
There ya go.

Give it up Caddeville, because everytime you post bullshit like you have here, I'm going to be right up your ass about it. You're so full of garbage that someone needs to clean your shit off of this site; or you can just admit that what you said referring to not following the precise tourqing procedures of the 4.x engine is wrong.

I do NOT give 2 shits about what some dumb ass (and he is) mechanic said about whatever it was you were babbling about or what you and your dad think you know, but when you come around here giving poor advice like that, his stupidity shines through, and from you. I'm not too worried about it anyways, because anyone who would happen to follow your advice would be just as much of an idiot as the advice you gave.

Now let's go through some of the holes in your BS stories:

You claim you knew that your camshaft was done for, yet why did you post a picture and ask about if it was good or not? Once you were told that is was shot (by several sources), you decided to put the damned thing back into the engine anyways! Good going putz :thumbsup:

Next you claim that your dad says the cam was good, but then you say it was shot (contradictions man...), yet once again, why ask after posting a picture? It would also seem to me that if your dad was the God of mechanics you make him out to be, then he would have also agreed that the cam was wiped, now wouldn't he? Sounds to me like he's one of those backwoods mechanics that would put woodchips into an engine to supress knocking...Hell, I'll put money on that man! Let me know what the name of the garage is so the next time some Canucklehead needs help, I'll tell him which chop-shop to avoid.

Now just stop it and go to time out young one before I have to send you a box of Kleenex! :tisk:

"Are you retracting from your mistake with another piece of bad advice here? Since you're an expert mechanic ( :rofl: ), why don't you tell us the steps for torquing down the heads on a 4.x liter engine...Seriously, I don't know, so please tell me!"

Ok, i will.

Torque Bolts in 3 steps: First torque all bolts to 38 ft. lbs. Second-Torque all bolts to 74 ft. lbs. Third-Torque bolts 1,3 and 4 to 90 ft. lbs.

There ya go.

Ahhh, now was that all that bad? Haynes is good for that!

Nah, i use ALLdata. I told my dad the cam was wiped after you guys told me it was wiped. And he didn't want to spend the money on that engine, so he decided to cut corners and hope that it was okay, it ran for like 2 days and then bam, started shaking. Now i'm thinkin about taking the 4100 out of my 87 to put in the 85, and gettin myself a 4.5. Or, take the rebuild tranny out of the 85 and keep it for the 87. And no, my dad isn't one of those back yard mechanics bro, he just hates cadillacs now, considering he drove one for 10 years, and then i got one to rub in his face.

http://www.cadillacforums.com/forums/ht4100-4-1-4-5-4/66881-collapsed-lifter.html

Here ya go Caddeville! Looks to me that you didn't know what you were doing from the get-go. Right here, in this thread we're arguing over, you said you knew that cam was wiped...Yet in this link to your old thread, you knew for sure that the cam was good...Holes man, holes :helpless:

Now which was it for sure? Was the cam bad or not? And do you plan on blaming your poor dad for another failure from your mechanical aptitude? Do you even remember the thread you created about how you relaized the cam was wiped out?

Well, atleast i thought and was told that 1 lobe couldn't go flat. Lets just stop now bro, after going on that adventure i've learned a hell of alot.