compresssion on high comp engine messed up

[DRHSMITH]

still having issues with my high preformance engine cylinder 1 is 106 pounds and by the time i get back easch one goes up a bit to cyli 4 which is 156 pounds what would cause this and should i just rering the engie pulling the head off tommorow to see if any scoring has happened to cylinders and check for warp vavles not seating ect, any tips pls?

and secondary on cyl 1 both intake and exhaust tower shims are way too low tolerances 5 thou as oipposed to the proper 20 or so on all other cylinders can they be adjusted or is there different sized towers?
pulling head off tommor wat noo so anyone whj could give me some tips thatd be muchly appreciated thanks

[azruss]

well, that makes sense. if you have very tight tolerances on valve clearance on #1, then those valves are opening early and closing late. this would definitely bleed off some compression.

[So Cal Mark]

do a leak down test to determine where the pressure is leaking. Is this a new engine or one with mileage on it?

[DRHSMITH]

was a new engine 4 yrs ago cyl 1 was 106 or so 2 was 119 3 was 135 and 4 was 156 took the head off yesterday cylinder walls look spotless the head i did is beauty all vavle seat well i stupidly listened to my dad and had someone do the block for me and assemble the rngie i port and polished the heads and exhaust manifold filled cylinders wiht oil they didnt move only cyl 1 had toleranmces a little off on the shim towers other were great , unfortunately doing the cyl head bolts 2 snapped down in the block so i has to come off again (was going to anyways to pull the block this week anyways) i made custom intake gaskets casue my ports were hugew the douch who did the block and assembled the engine didnt use my custom gaskets but stock ones my ports are almost double sized so made antoher gasket car runs very differently now way more responsive going to pull engine this week its 2 litre engine but bored out a bit ithink wheres the best place to have rings made up and how long does that take ?

if only i could get the head bolts out wihtout having to pull the heqad off again lol would have enjoyed driving it a bit the way iot is now but where one bolt snapped antifreeze comes up on top of head

[DRHSMITH]

and yes i used a torque wrench set to proper foot pounds specified mny the shop manual before you ask lol

[maytag]

was a new engine 4 yrs ago cyl 1 was 106 or so 2 was 119 3 was 135 and 4 was 156 took the head off yesterday cylinder walls look spotless the head i did is beauty all vavle seat well i stupidly listened to my dad and had someone do the block for me and assemble the rngie i port and polished the heads and exhaust manifold filled cylinders wiht oil they didnt move only cyl 1 had toleranmces a little off on the shim towers other were great , unfortunately doing the cyl head bolts 2 snapped down in the block so i has to come off again (was going to anyways to pull the block this week anyways) i made custom intake gaskets casue my ports were hugew the douch who did the block and assembled the engine didnt use my custom gaskets but stock ones my ports are almost double sized so made antoher gasket car runs very differently now way more responsive going to pull engine this week its 2 litre engine but bored out a bit ithink wheres the best place to have rings made up and how long does that take ?

if only i could get the head bolts out wihtout having to pull the heqad off again lol would have enjoyed driving it a bit the way iot is now but where one bolt snapped antifreeze comes up on top of head

i'm so confused.

did you re-read this post to yourself? does it make any sense to you? 'cuz I'm not able to make heads or tails of it. It sounds like you've pulled the head and discovered no problems, except that your "assembler" used the wrong gaskets. Then it sounds like you broke two head bolts while re-assembling? But you state that the motor runs better now... "way more responsive"
and it sounds like you THINK your motor is a 2L, and you THINK it is "bored out a bit". Are you not sure?
What rings are you having "made-up"? You said there was nothing wrong with the cylinder walls?

And why, exactly did you pull the head? Did you do a leakdown first, as suggested?
And did you take the advice of AZRUSS? He suggested that your valve clearances could've caused the dynamic compression variances you were seeing. Why didn't you start by adjusting those valves and seeing what that got you? I'm following his logic, and that sure would've been a better bet, in my book.

At this point, if we are to be of any more help, you may need to get Fiat218 to translate your posts into something we can understand.

[kmead]

Was a new engine 4 yrs ago. Testedc compression and it was cyl 1 was 106 or so, 2 was 119, 3 was 135 and 4 was 156. I took the head off yesterday cylinder walls look spotless. The head i did is a beauty, all valves seat well.

I stupidly listened to my dad and had someone do the block for me and assemble the engine. I port and polished the heads and exhaust manifold.

I filled cylinders with oil, retested the compression, they didnt move from before. I took Azruss's suggestion and found only cyl 1 had toleranmces a little off on the shim towers, the others were great.

Unfortunately when I was reassembling doing the cyl head, two bolts snapped down in the block so it has to come off again (was going to anyways to pull the block this week anyways).

I had made custom intake gaskets because my ports were huge, the douche who did the block and assembled the engine didnt use my custom gaskets but stock ones. My ports are almost double sized so I made another gasket. The car runs very differently now, way more responsive!

Going to pull engine this week its 2 litre engine but bored out a bit I think. Wheres the best place to have rings made up and how long does that take ?

If only i could get the head bolts out without having to pull the head off again, lol. I would have enjoyed driving it a bit, but the way it is now but where one bolt snapped, antifreeze comes up on top of head.

Best I could do.

Karl

[DRHSMITH]

ok sry was suffering form sleep deprevation its a 2l engine bore d out slighty i was told by installer with new high comp pistons i pulled the head wanting to inspect the block and make sure valve seating was good and check cylinder liners for scoring or damage as i still do not uinderstand why my compression is so diff in every cylinder , found that the ports i had done so large on the head were installed with stock gaskets whicih were about half the size of my ports even though i custom made gaskets for it and gave them to the mech to install , corrected the shim tower tappets found one on my parts car that was right tappet size and also took anohter 2 hrs to port more on my exhaust header which was stock to improve it a bit unfortunatly while reinstalling engine 2 head botls snapped compression holds fine in all cylinders only 1 bolt has antifreeze coming up through it so i temporarily used teflon tape and a bit of red silicon to seal it , anti freze sdoes not appear to be leakaing into cylinders or oil ....yet , after the engine was broken in the car flew for about 3 weeks until the head gasket blew, i reinstalled head gasket timing as i had doen more the nenough times before and car has nvr been the same since, the engine has high comp pistons weber 44's with 32 venturisaq stock header bored out and on the exhaust where themanifold attsaches to the pipe i have 2 side pipes wiht turbo dynamax race mufflers, the car is now way more responsive but still not near when it had broken in likely cause my compression is so messed up

[DRHSMITH]

and so now all shim towers are adjusted properly on the fornt cylinder i got 16 pounds more compression back making the fornt 3 cylinders more equal within 15 psi but the rear is 40 psi above the rest i have no idea what could have casued this and i think the only fix is too get new rings made up for the engine

[maytag]

okay.. forgive me... I'm gonna be just a little bit of a smart-alec. No harm is intended... but it's gonna be funny.

So, you're telling us that you currently have 2 head-bolts snapped-off in the block.... AND you're not sure why your compression numbers seem strange.
Did I get that right?

[DRHSMITH]

somewhat the numbers are actually higher then before i pulled the head casue cyl 1 was 96 pounds 2 was 116 3 was 124 and 4 was 156

adjustiing the tappets and new head gasket now cyl 1 to 121 pounds and doing the gasket matching and port exhaust more has got car way more power then before low end torque is good right up until middle of mid range then car doesnt have much power at all after that

the last 2 seasons i only drive it during spring and fall mostly when temp goes down below 10 degrees outside the car literally doubles in horsepower today is very hot 30 something degrees and it has a drastic improvement in horsepower so i cant wait to see when colder weather comes what it will do

ive read many posts on the webers setting the basic mixture one and a quarter turn out the nuts on the dumps are equal and synched fairly well drives very smooth but my compression is all over the map , ;leading me to believe that my rings are screwed whiocih is fine i can replace those but why would the riungs do this ? especially wiht the cyl liners looking brand new no scoring or any signs or damage ?

[DRHSMITH]

the snapped head bolts are bothersome; a little antifreeze was travelling up the bolt hole so i teflon taped and red siliconed te bolt shaft to seal it up no anti freeze is being lost whicih means it is not going into the oil compression is better then before but still all over the place im going to pull the head so i can fix the bolt issue but before i do so i would like some advce as to why this happend in thst place so i can fix any other problem which coud lhave led to this witt compression



so in case i havent made myself clear i shall simplify before i took off the head the car ran rly bad but all the bolts were ok , still with me , did some head work reinstalled head, during this time 2 bolts broke. the tappet issue fixed ,slightly helped boost cyl 1up 16 pounds, 3 and 4 cylinders compression is around stock levels but they are still variant, cylinder 4 is way higher then the rest 156 , something has casued this issue becuase head is fine must be losing compression in the rings, why would this happen so when i rering i wont have same issue ?

i took careful note of the motors break in procedure even the throttle linkage piece would only pull 40 percent of carbs to ensure that the engine couldnt be pushed hard after break in period and proper linkage the car flew foir about 3 weeks till a head gasket blew , after reinstralling head gasket as i had done many times in last 16 years the car was never the same i think somewhere a timing tooth had skipped casue i checked car earlier in april and found timing was off a bit recorrected car runs smooth but has no real horsepower except during cold weather, now after the work i had done lower end torque is way up and going into mid range is good but to go full on the pedal does almost nothing keeping my foot on half way gets same result power wise

[maytag]

I'm sorry, it seems my humor didn't make it. So let me be more clear:

You need to repair the head bolts before you can seriously start chasing compression issues. Seriously.
I see no reason to suspect the rings, when you have two broken head bolts.

And can I clarify some personals? Are you posting from a mobile device? and is English a second-language for you? Both are okay, but your posts are difficult to read and understand. At least for me.

[fiat218]

was a new engine 4 yrs ago cyl 1 was 106 or so 2 was 119 3 was 135 and 4 was 156 took the head off yesterday cylinder walls look spotless the head i did is beauty all vavle seat well i stupidly listened to my dad and had someone do the block for me and assemble the rngie i port and polished the heads and exhaust manifold filled cylinders wiht oil they didnt move only cyl 1 had toleranmces a little off on the shim towers other were great , unfortunately doing the cyl head bolts 2 snapped down in the block so i has to come off again (was going to anyways to pull the block this week anyways) i made custom intake gaskets casue my ports were hugew the douch who did the block and assembled the engine didnt use my custom gaskets but stock ones my ports are almost double sized so made antoher gasket car runs very differently now way more responsive going to pull engine this week its 2 litre engine but bored out a bit ithink wheres the best place to have rings made up and how long does that take ?

if only i could get the head bolts out wihtout having to pull the heqad off again lol would have enjoyed driving it a bit the way iot is now but where one bolt snapped antifreeze comes up on top of head

i'm so confused.

did you re-read this post to yourself? does it make any sense to you? 'cuz I'm not able to make heads or tails of it. It sounds like you've pulled the head and discovered no problems, except that your "assembler" used the wrong gaskets. Then it sounds like you broke two head bolts while re-assembling? But you state that the motor runs better now... "way more responsive"
and it sounds like you THINK your motor is a 2L, and you THINK it is "bored out a bit". Are you not sure?
What rings are you having "made-up"? You said there was nothing wrong with the cylinder walls?

And why, exactly did you pull the head? Did you do a leakdown first, as suggested?
And did you take the advice of AZRUSS? He suggested that your valve clearances could've caused the dynamic compression variances you were seeing. Why didn't you start by adjusting those valves and seeing what that got you? I'm following his logic, and that sure would've been a better bet, in my book.

At this point, if we are to be of any more help, you may need to get Fiat218 to translate your posts into something we can understand.

hey now !! he types like me MAYTAG hahaahahah

[seabeelt]

Not to be too critical of the writer, but it seems like you are writing using my kids text messaging shortcuts for words which us older folks are having a hard time deciphering. If you could use distinct clear sentances with at least some punctuation, that might help. If its a language thing then perhaps use one of those on-line free translation programs..... Then I would work on the chronological logic of your problem and steps taken to correct the problems. The overall description that I can manage so far is that you have unequal cylinder pressure after a rebuild. Lets start with what you did on the rebuild, then progress to how long you drove it before you had issues with compression and then what steps you have taken to analyze and fix the issues....We are here to support you, but its really hard to follow your post.