Refresh on 4.6 stroker

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SilverXJ
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Stroker Displacement: 4.6L
Vehicle Year: 2000
Vehicle Make: Jeep
Vehicle Model: Cherokee
Location: Radford, Va

Re: Refresh on 4.6 stroker

Post by SilverXJ »

Maybe you covered it already, but I would clean the IAC valve on the throttle body. Then check the TPS voltage output while closed and while moving the throttle through its range. You want to see a smooth voltage change and sometimes an old style dial meter works better for this. If those two are performed and its still is idling I would replace the CPS or swap with a known good one. I know no good way of testing it w/o a drb scan tool. Due to the shifting issues I would lean toward the TPS, but it can also cause the idle issues. The IAC can also cause idle issues.
beater_renix wrote:Most people say not to adjust the screw on the throttle body, except as a last resort.
On a stock engine and for most strokers this is true. The function of the screw is not to set base idle, but keep the throttle blade from making contact with the throttle body bode and damaging it and/or sticking. If you do go about messing with it, just remember its initial location or know how to set the correct clearance on the blade. Also jsawduste posted a good test for sufficient idle air flow using a playing or business card recently. I'm not sure which thread it was in but if you look at his recent posts you will find it.
blu3fan
I made it to triple digits!
I made it to triple digits!
Posts: 178
Joined: June 23rd, 2010, 11:05 am
Stroker Displacement: 4.6
Vehicle Year: 1992
Vehicle Make: cherokee
Vehicle Model: jeep

Re: Refresh on 4.6 stroker

Post by blu3fan »

So. Some things I have found. I used a mirror to peer into the intake. some of the intake on the inside seems to have like gummed up black stuff on it. (oil maybe ?)
Looks like possible valve blowby from years ago could have caused oil to sit in a pasageway,
im going to pull and clean all the sensors. and see what I get.

I posted on naxja about my shifting issue.
someone posted about the tv cable.
I marked where it was prior. then adjusted according to information found.
It shifts a little better. (I always thought it shifted a little late before. so this may have fixed that)
But not fixed.

Leaning more and more towards the tps.
going to get out the trusty voltmeter and check some sensors.




Some other little things. the freeze plugs seem to be leaking. Ugh. Im hoping as it got hot it sealed better. Im going to clean off the little weeps and see if it returns.
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SilverXJ
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Stroker Displacement: 4.6L
Vehicle Year: 2000
Vehicle Make: Jeep
Vehicle Model: Cherokee
Location: Radford, Va

Re: Refresh on 4.6 stroker

Post by SilverXJ »

Oh right.. i forgot about the tv cable. You just push the button, push the cable all the way in towards the throttle body, then with the engine off floor the pedal. You will have to give the pedal a bit of a push as you are working against the ratcheting mechanism in the adjuster.
blu3fan
I made it to triple digits!
I made it to triple digits!
Posts: 178
Joined: June 23rd, 2010, 11:05 am
Stroker Displacement: 4.6
Vehicle Year: 1992
Vehicle Make: cherokee
Vehicle Model: jeep

Re: Refresh on 4.6 stroker

Post by blu3fan »

Well.
Driving her today...looked down. temp was just starting to creep over the halfway mark on the temp sensor. so I pulled over right away.. she blew a freeze plug.
Its completely gone. Far rear plug fell out....
Ive never seen a freeze plug fall out.
I know I hammed the crap outa those things to get them into the block.
Its the one of the ones that had the little weep.
I don't think it was out for long. Im pretty ocd about checking my gauges. and I caught it right when the temp started climbing.
UGH !!

Questions.
I used Pro-Car (which is D&J sub-brand) Freeze plugs on 4 of the holes.
And 1 dorman plug.
The dorman plug is weeping up front.
I feel like I should replace them all. Is there a correct way to install them. I found varying responses online.
When I put these in. I cleaned the bores.
Coated the outside of each plug with a very light layer of orange rtv.
and hammered them all in.

Ive heard to put them in dry as well.
Was using the orange rtv my downfall ?

And now that I am looking closer all the plugs have slightly different sizing on them according to rockauto's listings.
Maybe I got the wrong plug size ?
I got dorman 555069 sizing 50.92mm; Metric Dia.; 50.92mm; Steel; Height: 0.420"; Open End Dia.: 2.015"
and this set fills the other holes
http://www.ebay.com/itm/Brand-New-Brass ... Ku&vxp=mtr
blu3fan
I made it to triple digits!
I made it to triple digits!
Posts: 178
Joined: June 23rd, 2010, 11:05 am
Stroker Displacement: 4.6
Vehicle Year: 1992
Vehicle Make: cherokee
Vehicle Model: jeep

Re: Refresh on 4.6 stroker

Post by blu3fan »

So I bought a new full dorman set. Im going to replace all of them. I Don't trust those plugs at all.
Also. Just for good measure. Im going to replace the radiator. Just in-case there's any blockage. for peace of mind.
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beater_renix
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Vehicle Model: Cherokee

Re: Refresh on 4.6 stroker

Post by beater_renix »

I can't tell you how familiar this is!

I lost a small freeze plug on mine the first week driving it. I used Permitex #2 on all the plugs originally. I used JB weld to put the offender back in. It hasn't had a problem since. If it ever comes out I'll need a die grinder to put in another one.
-Awesome Quote...

Beater_Renix
blu3fan
I made it to triple digits!
I made it to triple digits!
Posts: 178
Joined: June 23rd, 2010, 11:05 am
Stroker Displacement: 4.6
Vehicle Year: 1992
Vehicle Make: cherokee
Vehicle Model: jeep

Re: Refresh on 4.6 stroker

Post by blu3fan »

Haha. I might just do that.
Russ Pottenger
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Re: Refresh on 4.6 stroker

Post by Russ Pottenger »

Before I put my freeze plugs in, I lightly hit the board with a fine cartridge roll.
I've used everything from the black permitex silicone to copper Indian head.

Long time back a friend of mine that works at GM dealer recommends dropping in cooling system tabs.
I buy cases of them from the dealer. They're not that expensive. I drop them in right behind the freeze plug before I put install them. AC Delco part # 10-108 / 12378255
blu3fan
I made it to triple digits!
I made it to triple digits!
Posts: 178
Joined: June 23rd, 2010, 11:05 am
Stroker Displacement: 4.6
Vehicle Year: 1992
Vehicle Make: cherokee
Vehicle Model: jeep

Re: Refresh on 4.6 stroker

Post by blu3fan »

So the plugs arrived.
i got dorman pn 555-069-b
went to hammer it in. and it pushed into the bore without a good whack.
Its gotta be too small.
Help ?
Russ Pottenger
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Re: Refresh on 4.6 stroker

Post by Russ Pottenger »

They should go on pretty tight. In most cases they'll even peel a little brass from the OD of the plug as you pound them in.
I'm assuming your installing 2 inch brass freeze plugs?
Is it just one plug that's giving you a problem? If that's the case you might consider installing a universal expandable rubber plug in the loose hole.

Hopefully it's not the one behind the head or on the back bell housing area on the block.
blu3fan
I made it to triple digits!
I made it to triple digits!
Posts: 178
Joined: June 23rd, 2010, 11:05 am
Stroker Displacement: 4.6
Vehicle Year: 1992
Vehicle Make: cherokee
Vehicle Model: jeep

Re: Refresh on 4.6 stroker

Post by blu3fan »

its a 2" plug. but its steel not brass.
its the 5th plug in on the side.
the plug can be pushed all the way in and through to the inside of the coolant channel by hand.
its way too loose.
is it possible the other plug i hammered in widened the hole ?
Ive heard bad things about rubber plugs as a long term solution
Russ Pottenger
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Re: Refresh on 4.6 stroker

Post by Russ Pottenger »

If you can push it in by hand that's a problem.
Addressing fix while the engine still in the Jeep is a chalange.
Although a crack is more likely in the front freeze plugs, nevertheless give it a good visual.

A rubber expandable might not be the ideal choice, but may be your only.
blu3fan
I made it to triple digits!
I made it to triple digits!
Posts: 178
Joined: June 23rd, 2010, 11:05 am
Stroker Displacement: 4.6
Vehicle Year: 1992
Vehicle Make: cherokee
Vehicle Model: jeep

Re: Refresh on 4.6 stroker

Post by blu3fan »

Bought a expandable plug from o-Rileys
Should be a good temp fix.
but im guessing i should mic the bore.
and buy plugs according to findings.
Russ Pottenger
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Re: Refresh on 4.6 stroker

Post by Russ Pottenger »

Sounds like a good plan.
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beater_renix
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Re: Refresh on 4.6 stroker

Post by beater_renix »

Yep all too familiar. I didn't think of it until you mentioned it. I remember it going most of the way in by hand and a very light tap to seat it. I took it out, and used a socket just slightly larger. I forced them together until it expanded the outer diameter to fit. The "Freeze plugs" have already done their job of removing the casting sand so don't be afraid JB weld it (or at least on of them).
-Awesome Quote...

Beater_Renix
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