Re: Help! doing the 4.0 head swap on a 258!
 

Ever found out what was wrong ?????

Harris Family wrote:
> Folks, I'm in a pickle!
> Hope you can help me. I'm in the process of doing the head swap on my '86
> CJ7. Got the head installed no problem. Here's my catch, when I went to put
> the 258 stock rockers and pushrods back in, my valves were opened on #1 cyl
> when its at TDC. AS we all know this is not good for compression. Apparently
> either my pushrods are too long or something in the rockers is amiss. Got
> any ideas? Should I be using 4.0l rockers, pivot assemblies, and pushrods
> instead of the old 258 engine parts?
> Thanks for your help.
> Rich Harris
>
>

Re: Help! doing the 4.0 head swap on a 258!
 

Ever found out what was wrong ?????

Harris Family wrote:
> Folks, I'm in a pickle!
> Hope you can help me. I'm in the process of doing the head swap on my '86
> CJ7. Got the head installed no problem. Here's my catch, when I went to put
> the 258 stock rockers and pushrods back in, my valves were opened on #1 cyl
> when its at TDC. AS we all know this is not good for compression. Apparently
> either my pushrods are too long or something in the rockers is amiss. Got
> any ideas? Should I be using 4.0l rockers, pivot assemblies, and pushrods
> instead of the old 258 engine parts?
> Thanks for your help.
> Rich Harris
>
>

Re: Help! doing the 4.0 head swap on a 258!
 

Ever found out what was wrong ?????

Harris Family wrote:
> Folks, I'm in a pickle!
> Hope you can help me. I'm in the process of doing the head swap on my '86
> CJ7. Got the head installed no problem. Here's my catch, when I went to put
> the 258 stock rockers and pushrods back in, my valves were opened on #1 cyl
> when its at TDC. AS we all know this is not good for compression. Apparently
> either my pushrods are too long or something in the rockers is amiss. Got
> any ideas? Should I be using 4.0l rockers, pivot assemblies, and pushrods
> instead of the old 258 engine parts?
> Thanks for your help.
> Rich Harris
>
>

Re: Help! doing the 4.0 head swap on a 258!
 

Yep! Needed shorter pushrods. I had Crower check it all out and they made me
a set. Fortunately for me the Crower factory is here in the great shitty of
San Diego.
Those guys were great. I'd recommend them to anyone. They hooked me up with
a solid lifter and an adjustable pushrod. I took it home adjusted to fit and
then took the whole shooting match back with a hydraulic lifter from the
Jeep. They measured me up and the next day I had new rods. The day after
that I dislocated my shoulder and the whole project was put on hold until I
could work on it again. Well I ran out of time so my wife torqued the head
down (what a woman!, NO head jokes please) for me and I got the whole thing
together 3 days ago. The Jeep now runs like a raped ape! I HIGHLY recommend
this mod. Mileage seems to have improved, but it is a bit early to tell on
that, and tomorrow I'm going to wean back down to regular pump gas and see
if the detonation comes back. I expect it won't, but we'll soon see.
So what was wrong?
Rebuilt head plus rebulit block equals shorter pushrods. bottom line.
--
Rich Harris :1986 CJ7, Detroits F/R, 4:10's, 33"BFGMT's, Mopar F/I, 4.0L
head, Rubicon Express 2.5" Wrangler springs, Procomp MX6 Shocks, and a bunch
more fun stuff. To Reply; shave my hair.


"JohanB" <johanberkhoff.spam@earthlink.net> wrote in message
news:8IQZc.5982$w%6.3096@newsread1.news.pas.earthl ink.net...
> Ever found out what was wrong ?????
>
> Harris Family wrote:
>> Folks, I'm in a pickle!
>> Hope you can help me. I'm in the process of doing the head swap on my '86
>> CJ7. Got the head installed no problem. Here's my catch, when I went to
>> put
>> the 258 stock rockers and pushrods back in, my valves were opened on #1
>> cyl
>> when its at TDC. AS we all know this is not good for compression.
>> Apparently
>> either my pushrods are too long or something in the rockers is amiss. Got
>> any ideas? Should I be using 4.0l rockers, pivot assemblies, and pushrods
>> instead of the old 258 engine parts?
>> Thanks for your help.
>> Rich Harris
>>

Re: Help! doing the 4.0 head swap on a 258!
 

Yep! Needed shorter pushrods. I had Crower check it all out and they made me
a set. Fortunately for me the Crower factory is here in the great shitty of
San Diego.
Those guys were great. I'd recommend them to anyone. They hooked me up with
a solid lifter and an adjustable pushrod. I took it home adjusted to fit and
then took the whole shooting match back with a hydraulic lifter from the
Jeep. They measured me up and the next day I had new rods. The day after
that I dislocated my shoulder and the whole project was put on hold until I
could work on it again. Well I ran out of time so my wife torqued the head
down (what a woman!, NO head jokes please) for me and I got the whole thing
together 3 days ago. The Jeep now runs like a raped ape! I HIGHLY recommend
this mod. Mileage seems to have improved, but it is a bit early to tell on
that, and tomorrow I'm going to wean back down to regular pump gas and see
if the detonation comes back. I expect it won't, but we'll soon see.
So what was wrong?
Rebuilt head plus rebulit block equals shorter pushrods. bottom line.
--
Rich Harris :1986 CJ7, Detroits F/R, 4:10's, 33"BFGMT's, Mopar F/I, 4.0L
head, Rubicon Express 2.5" Wrangler springs, Procomp MX6 Shocks, and a bunch
more fun stuff. To Reply; shave my hair.


"JohanB" <johanberkhoff.spam@earthlink.net> wrote in message
news:8IQZc.5982$w%6.3096@newsread1.news.pas.earthl ink.net...
> Ever found out what was wrong ?????
>
> Harris Family wrote:
>> Folks, I'm in a pickle!
>> Hope you can help me. I'm in the process of doing the head swap on my '86
>> CJ7. Got the head installed no problem. Here's my catch, when I went to
>> put
>> the 258 stock rockers and pushrods back in, my valves were opened on #1
>> cyl
>> when its at TDC. AS we all know this is not good for compression.
>> Apparently
>> either my pushrods are too long or something in the rockers is amiss. Got
>> any ideas? Should I be using 4.0l rockers, pivot assemblies, and pushrods
>> instead of the old 258 engine parts?
>> Thanks for your help.
>> Rich Harris
>>

Re: Help! doing the 4.0 head swap on a 258!
 

Yep! Needed shorter pushrods. I had Crower check it all out and they made me
a set. Fortunately for me the Crower factory is here in the great shitty of
San Diego.
Those guys were great. I'd recommend them to anyone. They hooked me up with
a solid lifter and an adjustable pushrod. I took it home adjusted to fit and
then took the whole shooting match back with a hydraulic lifter from the
Jeep. They measured me up and the next day I had new rods. The day after
that I dislocated my shoulder and the whole project was put on hold until I
could work on it again. Well I ran out of time so my wife torqued the head
down (what a woman!, NO head jokes please) for me and I got the whole thing
together 3 days ago. The Jeep now runs like a raped ape! I HIGHLY recommend
this mod. Mileage seems to have improved, but it is a bit early to tell on
that, and tomorrow I'm going to wean back down to regular pump gas and see
if the detonation comes back. I expect it won't, but we'll soon see.
So what was wrong?
Rebuilt head plus rebulit block equals shorter pushrods. bottom line.
--
Rich Harris :1986 CJ7, Detroits F/R, 4:10's, 33"BFGMT's, Mopar F/I, 4.0L
head, Rubicon Express 2.5" Wrangler springs, Procomp MX6 Shocks, and a bunch
more fun stuff. To Reply; shave my hair.


"JohanB" <johanberkhoff.spam@earthlink.net> wrote in message
news:8IQZc.5982$w%6.3096@newsread1.news.pas.earthl ink.net...
> Ever found out what was wrong ?????
>
> Harris Family wrote:
>> Folks, I'm in a pickle!
>> Hope you can help me. I'm in the process of doing the head swap on my '86
>> CJ7. Got the head installed no problem. Here's my catch, when I went to
>> put
>> the 258 stock rockers and pushrods back in, my valves were opened on #1
>> cyl
>> when its at TDC. AS we all know this is not good for compression.
>> Apparently
>> either my pushrods are too long or something in the rockers is amiss. Got
>> any ideas? Should I be using 4.0l rockers, pivot assemblies, and pushrods
>> instead of the old 258 engine parts?
>> Thanks for your help.
>> Rich Harris
>>

Re: Help! doing the 4.0 head swap on a 258!
 

Wow, neat it works like that.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Harris Family wrote:
>
> Yep! Needed shorter pushrods. I had Crower check it all out and they made me
> a set. Fortunately for me the Crower factory is here in the great shitty of
> San Diego.
> Those guys were great. I'd recommend them to anyone. They hooked me up with
> a solid lifter and an adjustable pushrod. I took it home adjusted to fit and
> then took the whole shooting match back with a hydraulic lifter from the
> Jeep. They measured me up and the next day I had new rods. The day after
> that I dislocated my shoulder and the whole project was put on hold until I
> could work on it again. Well I ran out of time so my wife torqued the head
> down (what a woman!, NO head jokes please) for me and I got the whole thing
> together 3 days ago. The Jeep now runs like a raped ape! I HIGHLY recommend
> this mod. Mileage seems to have improved, but it is a bit early to tell on
> that, and tomorrow I'm going to wean back down to regular pump gas and see
> if the detonation comes back. I expect it won't, but we'll soon see.
> So what was wrong?
> Rebuilt head plus rebulit block equals shorter pushrods. bottom line.
> --
> Rich Harris :1986 CJ7, Detroits F/R, 4:10's, 33"BFGMT's, Mopar F/I, 4.0L
> head, Rubicon Express 2.5" Wrangler springs, Procomp MX6 Shocks, and a bunch
> more fun stuff. To Reply; shave my hair.
>
> "JohanB" <johanberkhoff.spam@earthlink.net> wrote in message
> news:8IQZc.5982$w%6.3096@newsread1.news.pas.earthl ink.net...
> > Ever found out what was wrong ?????
> >
> > Harris Family wrote:
> >> Folks, I'm in a pickle!
> >> Hope you can help me. I'm in the process of doing the head swap on my '86
> >> CJ7. Got the head installed no problem. Here's my catch, when I went to
> >> put
> >> the 258 stock rockers and pushrods back in, my valves were opened on #1
> >> cyl
> >> when its at TDC. AS we all know this is not good for compression.
> >> Apparently
> >> either my pushrods are too long or something in the rockers is amiss. Got
> >> any ideas? Should I be using 4.0l rockers, pivot assemblies, and pushrods
> >> instead of the old 258 engine parts?
> >> Thanks for your help.
> >> Rich Harris
> >>

Re: Help! doing the 4.0 head swap on a 258!
 

Wow, neat it works like that.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Harris Family wrote:
>
> Yep! Needed shorter pushrods. I had Crower check it all out and they made me
> a set. Fortunately for me the Crower factory is here in the great shitty of
> San Diego.
> Those guys were great. I'd recommend them to anyone. They hooked me up with
> a solid lifter and an adjustable pushrod. I took it home adjusted to fit and
> then took the whole shooting match back with a hydraulic lifter from the
> Jeep. They measured me up and the next day I had new rods. The day after
> that I dislocated my shoulder and the whole project was put on hold until I
> could work on it again. Well I ran out of time so my wife torqued the head
> down (what a woman!, NO head jokes please) for me and I got the whole thing
> together 3 days ago. The Jeep now runs like a raped ape! I HIGHLY recommend
> this mod. Mileage seems to have improved, but it is a bit early to tell on
> that, and tomorrow I'm going to wean back down to regular pump gas and see
> if the detonation comes back. I expect it won't, but we'll soon see.
> So what was wrong?
> Rebuilt head plus rebulit block equals shorter pushrods. bottom line.
> --
> Rich Harris :1986 CJ7, Detroits F/R, 4:10's, 33"BFGMT's, Mopar F/I, 4.0L
> head, Rubicon Express 2.5" Wrangler springs, Procomp MX6 Shocks, and a bunch
> more fun stuff. To Reply; shave my hair.
>
> "JohanB" <johanberkhoff.spam@earthlink.net> wrote in message
> news:8IQZc.5982$w%6.3096@newsread1.news.pas.earthl ink.net...
> > Ever found out what was wrong ?????
> >
> > Harris Family wrote:
> >> Folks, I'm in a pickle!
> >> Hope you can help me. I'm in the process of doing the head swap on my '86
> >> CJ7. Got the head installed no problem. Here's my catch, when I went to
> >> put
> >> the 258 stock rockers and pushrods back in, my valves were opened on #1
> >> cyl
> >> when its at TDC. AS we all know this is not good for compression.
> >> Apparently
> >> either my pushrods are too long or something in the rockers is amiss. Got
> >> any ideas? Should I be using 4.0l rockers, pivot assemblies, and pushrods
> >> instead of the old 258 engine parts?
> >> Thanks for your help.
> >> Rich Harris
> >>

Re: Help! doing the 4.0 head swap on a 258!
 

Wow, neat it works like that.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Harris Family wrote:
>
> Yep! Needed shorter pushrods. I had Crower check it all out and they made me
> a set. Fortunately for me the Crower factory is here in the great shitty of
> San Diego.
> Those guys were great. I'd recommend them to anyone. They hooked me up with
> a solid lifter and an adjustable pushrod. I took it home adjusted to fit and
> then took the whole shooting match back with a hydraulic lifter from the
> Jeep. They measured me up and the next day I had new rods. The day after
> that I dislocated my shoulder and the whole project was put on hold until I
> could work on it again. Well I ran out of time so my wife torqued the head
> down (what a woman!, NO head jokes please) for me and I got the whole thing
> together 3 days ago. The Jeep now runs like a raped ape! I HIGHLY recommend
> this mod. Mileage seems to have improved, but it is a bit early to tell on
> that, and tomorrow I'm going to wean back down to regular pump gas and see
> if the detonation comes back. I expect it won't, but we'll soon see.
> So what was wrong?
> Rebuilt head plus rebulit block equals shorter pushrods. bottom line.
> --
> Rich Harris :1986 CJ7, Detroits F/R, 4:10's, 33"BFGMT's, Mopar F/I, 4.0L
> head, Rubicon Express 2.5" Wrangler springs, Procomp MX6 Shocks, and a bunch
> more fun stuff. To Reply; shave my hair.
>
> "JohanB" <johanberkhoff.spam@earthlink.net> wrote in message
> news:8IQZc.5982$w%6.3096@newsread1.news.pas.earthl ink.net...
> > Ever found out what was wrong ?????
> >
> > Harris Family wrote:
> >> Folks, I'm in a pickle!
> >> Hope you can help me. I'm in the process of doing the head swap on my '86
> >> CJ7. Got the head installed no problem. Here's my catch, when I went to
> >> put
> >> the 258 stock rockers and pushrods back in, my valves were opened on #1
> >> cyl
> >> when its at TDC. AS we all know this is not good for compression.
> >> Apparently
> >> either my pushrods are too long or something in the rockers is amiss. Got
> >> any ideas? Should I be using 4.0l rockers, pivot assemblies, and pushrods
> >> instead of the old 258 engine parts?
> >> Thanks for your help.
> >> Rich Harris
> >>