ARP head bolts/studs yay or nay? | Ford Escort Owners Association (FEOA)

ARP head bolts/studs yay or nay?

Discussion in '1st Gen 1981-1990 CVH' started by austin86, Jan 31, 2020.

  1. austin86

    austin86 That nut who spends way to much on a escort.

    Messages:
    588
    Likes Received:
    143
    Trophy Points:
    58
    Location:
    Ohio
    After doing some looking it would seem that the 1.6l heat bolts/stud kits form ARP will fit a 1.9l
    Since I been working on a 1.9l CVH build I'm thinking of getting ARP bolts for the rods and head and maybe the manifolds.

    However I'm on the fence with using ARP head studs or bolts, I know over in the UK people seem to be against them as then don't stretch and blow head gaskets and crack heads/blocks. That makes since seeing that cast iron and aluminum expand and heat up at different rates and I do recall ford recalling early escorts and replacing the head bolts with ones that can stretch.

    Anyway all that aside if you were shooting for 150-200HP with boost would you use ARP head bolts or studs?
  2. Joey_Twowagons

    Joey_Twowagons FEOA Member

    Messages:
    2,163
    Likes Received:
    952
    Trophy Points:
    363
    Location:
    Vancouver Island, Canada
    Yay!

    I bought a set for my 1.9 because I dislike the "Torque to Yield" originals. I ranted about them in a post a couple years ago.

    ARP really missed the boat by not including the 1,9 and 2.0 SPI engines (and probably a few others) in the listing for the 1600 cc Escort engine. They surely could have sold a lot more sets over the years.

    I take all this aluminum head / cast iron block issues with a grain of salt. Toyota (and no doubt many others) in the late '60s had this setup with regular head bolts and they seemed fine.
    Come to think of it, Ford flathead V8s at least in Canada had aluminum heads.
    austin86 likes this.
  3. 1982 EXPert

    1982 EXPert FEOA Member

    Messages:
    56
    Likes Received:
    37
    Trophy Points:
    28
    I'd go for studs, especially with boost.

    ARP calculates for the bolt-stretch, when you buy the CVH stud kit you're supposed to get instructions on the torque specs for a couple different applications.

    I'm not fond of the torque-to-yield either, that could contribute to how/why the heads warp so easily (in addition to the very high thermostat and fan switch settings)

    With the studs you can torque them to whatever you want, guys with 2nd gen 1.9s under 15psi of boost torque the heads down HARD with no issues AND the studs are reusable :D
    I'lll slowly convert all on mine to studs, not really a down side besides price. I love that I can get head bolts from rockauto for $4 lmao

    Many recommend rod studs too, apparently that's the stock rod's weakest link. But I wouldn't worry about it unless you want to be in the 7,500+rpm or 200+hp camp
  4. marclar

    marclar Moderator Staff Member

    Messages:
    8,812
    Likes Received:
    488
    Trophy Points:
    383
    Location:
    seabeck WA
    a 1.9 would explode at 7500 rpm lol... the rods are sintered powdered metal, which is why they are 'weak'.. they dont take to the vibration stress as well as a cast or machined part. sintered metal is found in all sorts of areas... for example differential gears, trans gears, timing belt sprockets... any part that would be too expensive to machine in a mass production. with that said, i dont think that the studs would help much unless you used a high performance rod as well.

    as far as head studs.. thats up to you. it has been done. also, huge power has been made with stretchy bolts. its not like they are made of clay, they are a high grade spring steel. the harder you stretch them the harder they hold. one benifit of tty bolts is that they do not require 're torquing' like studs do. they also compinsate for heat cycles easier by having an area to 'stretch into'.. studs will hold the head rigid and wont allow for expansion..which is a whole other topic.

    back in the days there were a bunch of us that ran 15+ psi on felpro gaskets and stock tty bolts. never had issues... with that said,, quality is not what it used to be. i was able to find a MLS headgasket that fits the splitport engine.. but not quite right for the 1.9. i have a torn down spi motor in my garage awaiting proper funding and i do plan on using studs on it. but it will have a full hemi spi head.

    the term 'stretch' in tty bolts is used widely.. yes, they do stretch.. but so do springs. all fasteners will stretch, thats how they generate clamping force. they do make gauges that measure if a bolt is over stretched.. and tty bolts can be used multiple times.

    so in answer to your question... do i need studs for 200 hp, i would say no. but again, that is up to you.
    austin86 likes this.
  5. austin86

    austin86 That nut who spends way to much on a escort.

    Messages:
    588
    Likes Received:
    143
    Trophy Points:
    58
    Location:
    Ohio
    the rods do scare me a bit. But I do not know of anything that will work shy of custom fabbing new rods.

    EDIT:
    unless if 1.6l rods fit a 1.9l. I know rock auto lists the same rods for both the 1.6l and 1.9l
  6. marclar

    marclar Moderator Staff Member

    Messages:
    8,812
    Likes Received:
    488
    Trophy Points:
    383
    Location:
    seabeck WA
    honestly, i wouldnt worry about the rods with your hp goal...... i had a 1.9 and a split port motor that had a T3 running between 15-17psi... i had more problems with diffs and axles than anything. pistons grenaded due to a spark knock issue, rods were fine.
    austin86 likes this.
  7. austin86

    austin86 That nut who spends way to much on a escort.

    Messages:
    588
    Likes Received:
    143
    Trophy Points:
    58
    Location:
    Ohio
    That is good to hear... well sorta haha. I don't want to be killing Diffs or axles ether.
  8. marclar

    marclar Moderator Staff Member

    Messages:
    8,812
    Likes Received:
    488
    Trophy Points:
    383
    Location:
    seabeck WA
    well the 1g stuff is a bit 'beefier' than the 2nd gen stuff, thats for sure... i beat the snot out of my car. it was unhealthy
    1982 EXPert likes this.
  9. Joey_Twowagons

    Joey_Twowagons FEOA Member

    Messages:
    2,163
    Likes Received:
    952
    Trophy Points:
    363
    Location:
    Vancouver Island, Canada
    Just to clarify, I bought head studs from ARP. I am not aware whether they sell head bolts or not.

    I have no plans on high power, high rpm or boost. I just don't like using "disposable" bolts, and appreciate the quality of the ARP products.
  10. 1982 EXPert

    1982 EXPert FEOA Member

    Messages:
    56
    Likes Received:
    37
    Trophy Points:
    28
    From my experience with all sorts of FoMoCos:
    90s Ford is worst Ford haha

    Their 80s stuff is great
    Even their 05+ cars are awesome but 91-05 isn't as righteous as it should be....
  11. Joey_Twowagons

    Joey_Twowagons FEOA Member

    Messages:
    2,163
    Likes Received:
    952
    Trophy Points:
    363
    Location:
    Vancouver Island, Canada
    Hey, we second generation Escort owners resemble that remark.
  12. 1982 EXPert

    1982 EXPert FEOA Member

    Messages:
    56
    Likes Received:
    37
    Trophy Points:
    28
    Not trying to offend but that's the sad truth, it was in response to Marclar.

    I've had over a dozen Contours/Mystiques and they too suffer from weak trannys even in stock form, so once you start hopping them up kiss your trans goodbye and if you're lucky enough your trans doesn't explode your axles will definitely snap. They're delicate flowers, ESPECIALLY the SVT. They also suffer from crappy wiring harness and switch failures typical of 90s Ford, when they're great they're great but repairs are often and rarely simple.

    We love-hate our 90s Fords, love driving them, hate working on them all the time
    But we love our 80s EXPs without any serious issues (only issue being the age of door/window seals)
    We love our 65 Mustang without any issues (aside from the door armrests lol)
    And our 06-18 Fusions are incredible, best cars ever in my book
  13. marclar

    marclar Moderator Staff Member

    Messages:
    8,812
    Likes Received:
    488
    Trophy Points:
    383
    Location:
    seabeck WA
    at my last job after i left the delerships was a small independant store... probably 80% of what came through the door was some sort of ford... usually white ones. i finally got to the point i couldnt handle working on them anymore... it hurts my head too much. now i just do mopar stuff at a local dealer. its almost like ford went out of their way to make things difficult... poor designs, PLASTIC EVERYTHING, poor quality materials...

    im a firm beliver that ford forgot how to build an engine around 2000. the eco boost engines are boat anchors..


    im planning on using studs on my next motor build. but this will be a first for me.
  14. austin86

    austin86 That nut who spends way to much on a escort.

    Messages:
    588
    Likes Received:
    143
    Trophy Points:
    58
    Location:
    Ohio
    I have to agree. but I can say the base model cars in S trim are not all to bad to work on being so striped of options.
    I think the only motor ford still does right is the 1.6l fiesta motor. Don't forget they can't make automatic trans anymore ether.
    But good lord the power stoke trucks, I will not even go near one.. They are just plan FUBAR. Who in the right mind would think dumping so much fuel into 2 cylinders that they die after 100k miles to clear out a DPF is a good idea
    Last edited: Feb 10, 2020
  15. marclar

    marclar Moderator Staff Member

    Messages:
    8,812
    Likes Received:
    488
    Trophy Points:
    383
    Location:
    seabeck WA
    the 7.3 was indeed a good motor.. but every one after it... not so much..
    6.0, looked good on paper but almost made them go bankrupt from lawsuits...
    6.4... just.. wow, really?
    6.7... dont even know where to start...


    now just like anything else, there ARE some good ones.. my current shop doesnt even take ford diesels in anymore, we diflect them at the door and send to dealer... shop has lots too much time/money on fixing them.. there is ALWAYS something else that goes wrong...
    1982 EXPert likes this.
  16. austin86

    austin86 That nut who spends way to much on a escort.

    Messages:
    588
    Likes Received:
    143
    Trophy Points:
    58
    Location:
    Ohio
    If I ran a shop Id do the same for the most part. maybe change the oil or a tire job but that would be about it. Last thing I want to do is change the oil cooler on a power stoke f250 :(
  17. marclar

    marclar Moderator Staff Member

    Messages:
    8,812
    Likes Received:
    488
    Trophy Points:
    383
    Location:
    seabeck WA
    step 1... pull cab

Share This Page