HELP! 5.0 w/trick flow heads..Rockers setup wrong? Pushrods?

1slowhatch · April 19th, 2007, 02:19 AM

Recently tore down and assembled my motor...91 5.0 stock bottom end, track heat heads, bbk ssi intake, bolt ons. Just finally tried running the motor, and wouldn't start. Messed with timing forever, injectors are firing. So, i tried the old blow the finger off the spark plug hole, and no mater how many times i ran the starter, there never was a compression stroke. I am running a tfs stage 1 cam, 1.7 rockers, 6.750 pushrod length. Don't know what's going on here?? Could i have set up rocker arms too tight? Too long of a pushrod? Someone please help.

1slo5.0 · April 19th, 2007, 09:55 AM

Rocker arms too tight or bent valves.

1slowhatch · April 19th, 2007, 11:47 AM

that's what i was figuring. so, if the rocker arms are set up too tight, the pushrods can't move them to open the valves?

thanks for the help.

1slo5.0 · April 19th, 2007, 02:34 PM

Originally Posted by 1slowhatch

that's what i was figuring. so, if the rocker arms are set up too tight, the pushrods can't move them to open the valves?

thanks for the help.

No, if the rocker arms are too tight the valves will be hanging open which could possibly cause contact between the valve and piston. Also if you didn't check valve to piston clearance you might not have had enough clearance.

1slowhatch · April 19th, 2007, 04:14 PM

i did the old clay check, cam up with around .25 inch on both intake and exhaust, if i did it correctly. do you think i hurt anything turning it over several times setup incorrectly? i didn't hear anything too bad.

1slo5.0 · April 19th, 2007, 04:45 PM

Originally Posted by 1slowhatch

i did the old clay check, cam up with around .25 inch on both intake and exhaust, if i did it correctly. do you think i hurt anything turning it over several times setup incorrectly? i didn't hear anything too bad.

If you have .250 on the intake and exhaust you have plenty of clearance.

1slowhatch · March 2nd, 2009, 11:22 PM

haha!!!

i am still having problems 2 years later. lol.

the car has been running fine.

tore it down to add a turbo....

can't setup the rocker arms correctly. i'm using a 6.750 pushrod (tfs), stock bottom end 5.0, tfs track heats heads, tfs 1 cam, tfs 1.7 ratio rocker arms.

i can't tighten down the rocker arms at tdc zero lash past 1/4 turn and still have the cylinder build enough pressure to push my finger off the spark plug hole. (leaving a valve open) the rocker arm tip seems to be contacting the center of the valve.

what am i doing wrong? got to be too long of a pushrod correct?

e3sean · March 2nd, 2009, 11:26 PM

how did you check your ptv clearence? did u use a solid lifter? did you prime the oil first?
with no oil in the lifter it will compress more then with no oil so you still could have bent the valve.

1slowhatch · March 3rd, 2009, 01:17 AM

just like the trick flow instruction manual states to. mock up lifter and clay./

like i said, i couldn't have a piston to valve clearance problem and have driven it 5000 miles just fine, including many 1/4 mile passes.

the top of the pistons have no marks, rockers look brand new as do the pushrods themselves.

anybody have a similar setup and could tell me what pushrod length they ran?

93mustank · March 3rd, 2009, 02:09 AM

Originally Posted by 1slowhatch

anybody have a similar setup and could tell me what pushrod length they ran?

That statement is your problem....

You have not checked for proper pushrod length and geometry.....you will continue to have problems if you cut corners......

1slowhatch · March 3rd, 2009, 11:32 AM

initially i had, but i was not confident in my number. so i went with what trick flow said and everybody else seemed to go with. if i remember correctly, i measured just under 6.700". i ended up going with what trick flow sends out in there topend kit.

how is it, that it is sooo critical that you need to measure for it every time even on a stock 5.0 ho, but when trick flow sends you a kit, they come with at a default length?

after speaking with some friends, it looks like the only thing that will happen with a longer pushrod, is that the rocker will not be centered on the tip of the valve. well, to my eye ball it looks pretty darn centered. so i must still be setting them up wrong.

thanks for the reply, next time you need help, hopefully someone gives you a useless smug answer....

93mustank · March 3rd, 2009, 01:07 PM

Originally Posted by 1slowhatch

thanks for the reply, next time you need help, hopefully someone gives you a useless smug answer....

Next time I will rub your back and tell you it will be ok while feeding you strawberries.

You asked for help and were given some........ Continue to eyball everything and not take advice.... you still will have the same problems and the same slow car.

superbean · March 3rd, 2009, 01:53 PM

Originally Posted by 93mustank

thanks for the reply, next time you need help, hopefully someone gives you a Next time I will rub you back and tell you it will be ok while feeding you strawberries.

You asked for help and were given some........ Continue to eyball everything and not take advice.... you still will have the same problems and the same slow car.

yup. .05in on pushrod length is a lot.

1slowhatch · March 3rd, 2009, 02:38 PM

the problem is that some of the lifters are pumped up while others aren't.

i have the correct pushrods.

i assume your setup is up to date in your sig... if so, i bet running the way it was before I was making similar power. whats your car weigh? lol. probably a coupe that doesn't weigh 2600 lbs, with a ton of gear and full slicks?? getting close?

what help did you give? your first post was smug and didn't help me at all.

plenty of others gave advice and i listened... thanks guys

and a back rub would nice.....

93mustank · March 3rd, 2009, 04:35 PM

Originally Posted by 1slowhatch

i assume your setup is up to date in your sig... if so, i bet running the way it was before I was making similar power. whats your car weigh? lol. probably a coupe that doesn't weigh 2600 lbs, with a ton of gear and full slicks?? getting close?

Your one of those guys.....

Yup your right ...just a sloppy combo thrown together that doesnt perform well.

Whats your combo?
Chicken wired lx hatch that your parents bought you ....with a bunch of mis matched parts that were "eyeballed" and a junk yard turbo ....all together runs a 14.5 ??????

1slowhatch · March 3rd, 2009, 06:28 PM

wait....you're running heads off of a ford explorer that was probably being parted and then junked and you're going to talk shit about my parts...? LOL

no, my mom didn't have to buy me this car, you don't need more than 800 bucks to get a "chicken wired" lx hatch together....

damn i wish my car ran 14's....that's damn fast.

no the turbo is off of a lebaron convertible.

maybe if my car weighed what a civic hatch did i'd run 12's...

thank you for all your help.

93mustank · March 3rd, 2009, 10:08 PM

Originally Posted by 1slowhatch

maybe if my car weighed what a civic hatch did i'd run 12's...

Thats cute........
Perdy neat

April 19th, 2007, 02:19 AM	#1
1slowhatch Regular Join Date: Apr 2007 Posts: 65 iTrader: 0 reviews	HELP! 5.0 w/trick flow heads..Rockers setup wrong? Pushrods? Recently tore down and assembled my motor...91 5.0 stock bottom end, track heat heads, bbk ssi intake, bolt ons. Just finally tried running the motor, and wouldn't start. Messed with timing forever, injectors are firing. So, i tried the old blow the finger off the spark plug hole, and no mater how many times i ran the starter, there never was a compression stroke. I am running a tfs stage 1 cam, 1.7 rockers, 6.750 pushrod length. Don't know what's going on here?? Could i have set up rocker arms too tight? Too long of a pushrod? Someone please help.

April 19th, 2007, 09:55 AM	#2
1slo5.0 MM Ninjas! 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: North Fond du Lac, Wisconsin Posts: 11,375 iTrader: 1 reviews	Rocker arms too tight or bent valves. __________________ My daily driver has 16 cylinders and 4400hp @ 1000 rpm.... ***1988 Mustang GT - Stock....almost

March 2nd, 2009, 11:26 PM	#8
e3sean I Post Entirely Way Too Much 1988 lx 9.68@142 Join Date: Nov 2007 Location: goldsboro NC Posts: 5,599 iTrader: 0 reviews	how did you check your ptv clearence? did u use a solid lifter? did you prime the oil first? with no oil in the lifter it will compress more then with no oil so you still could have bent the valve. __________________

March 3rd, 2009, 02:38 PM	#14
1slowhatch Regular Join Date: Apr 2007 Posts: 65 iTrader: 0 reviews	the problem is that some of the lifters are pumped up while others aren't. i have the correct pushrods. i assume your setup is up to date in your sig... if so, i bet running the way it was before I was making similar power. whats your car weigh? lol. probably a coupe that doesn't weigh 2600 lbs, with a ton of gear and full slicks?? getting close? what help did you give? your first post was smug and didn't help me at all. plenty of others gave advice and i listened... thanks guys and a back rub would nice..... Last edited by 1slowhatch; March 3rd, 2009 at 02:38 PM. Reason: oops

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April 19th, 2007, 11:47 AM	#3
1slowhatch Regular Join Date: Apr 2007 Posts: 65 iTrader: 0 reviews	that's what i was figuring. so, if the rocker arms are set up too tight, the pushrods can't move them to open the valves? thanks for the help.

April 19th, 2007, 04:14 PM	#5
1slowhatch Regular Join Date: Apr 2007 Posts: 65 iTrader: 0 reviews	i did the old clay check, cam up with around .25 inch on both intake and exhaust, if i did it correctly. do you think i hurt anything turning it over several times setup incorrectly? i didn't hear anything too bad.

March 2nd, 2009, 11:22 PM	#7
1slowhatch Regular Join Date: Apr 2007 Posts: 65 iTrader: 0 reviews	haha!!! i am still having problems 2 years later. lol. the car has been running fine. tore it down to add a turbo.... can't setup the rocker arms correctly. i'm using a 6.750 pushrod (tfs), stock bottom end 5.0, tfs track heats heads, tfs 1 cam, tfs 1.7 ratio rocker arms. i can't tighten down the rocker arms at tdc zero lash past 1/4 turn and still have the cylinder build enough pressure to push my finger off the spark plug hole. (leaving a valve open) the rocker arm tip seems to be contacting the center of the valve. what am i doing wrong? got to be too long of a pushrod correct?

March 3rd, 2009, 01:17 AM	#9
1slowhatch Regular Join Date: Apr 2007 Posts: 65 iTrader: 0 reviews	just like the trick flow instruction manual states to. mock up lifter and clay./ like i said, i couldn't have a piston to valve clearance problem and have driven it 5000 miles just fine, including many 1/4 mile passes. the top of the pistons have no marks, rockers look brand new as do the pushrods themselves. anybody have a similar setup and could tell me what pushrod length they ran?

March 3rd, 2009, 11:32 AM	#11
1slowhatch Regular Join Date: Apr 2007 Posts: 65 iTrader: 0 reviews	initially i had, but i was not confident in my number. so i went with what trick flow said and everybody else seemed to go with. if i remember correctly, i measured just under 6.700". i ended up going with what trick flow sends out in there topend kit. how is it, that it is sooo critical that you need to measure for it every time even on a stock 5.0 ho, but when trick flow sends you a kit, they come with at a default length? after speaking with some friends, it looks like the only thing that will happen with a longer pushrod, is that the rocker will not be centered on the tip of the valve. well, to my eye ball it looks pretty darn centered. so i must still be setting them up wrong. thanks for the reply, next time you need help, hopefully someone gives you a useless smug answer....

March 3rd, 2009, 06:28 PM	#16
1slowhatch Regular Join Date: Apr 2007 Posts: 65 iTrader: 0 reviews	wait....you're running heads off of a ford explorer that was probably being parted and then junked and you're going to talk shit about my parts...? LOL no, my mom didn't have to buy me this car, you don't need more than 800 bucks to get a "chicken wired" lx hatch together.... damn i wish my car ran 14's....that's damn fast. no the turbo is off of a lebaron convertible. maybe if my car weighed what a civic hatch did i'd run 12's... thank you for all your help.

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