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Topic: 88 sport rebuild , need advice (Read 27373 times) previous topic - next topic

88 sport rebuild , need advice

Reply #150 –
thanks buddy, i will be getting dirty again,,
what once a few hours ago was a laboratory clean room situation has suddenly become a filthy floor and nightmare again.

88 sport rebuild , need advice

Reply #151 –
Quote from: tom renzo;420321
oil flows from the main feed holes to the saddles and into the cam bearings via a slotted main bearing. At the back of the block, you will find a core plug (freeze plug) under the intake. One hole goes nearly straight down. The other is drilled at an angle. The one that goes straight down intersects all the way down to the main galley. Both of these holes intersect the lifter galleys. Lifters are oiled through these galleys and of course the springs and rockers are oiled through the push rods.
this is the oil galley plug i'm talking about.

88 sport rebuild , need advice

Reply #152 –
Foe for some reason i remember a tech bullitin on this from AERA. I am frantically looking for it and i cant find it. I think if the plug is the wrong one or driven in to far it blocks the gallies from getting oil. This is sticking in my head like a bad dream. I just cant find it and i know that is the INTERSECTION for the gallies!! Unfortunately i do not have a bare block laying around. Can you understand where i am coming from FOE. That plug is bugging me and i would pull it out and spin the pump and see if oil is there. I think that is the issue or the main bearing slot that feeds it. I wish i was there to pull this apart. It has me going and i wont be able to sleep until i find this TSB!!
I spend money I don't have, To build  cars I don't need, To impress people I don't know

HAVE YOU DRIVEN A FORD LATELY!!

88 sport rebuild , need advice

Reply #153 –
Like I said THIS MORNING, I've seen that plug blow out and wreak havoc before, you just have to pull the intake to know for sure.  If you find it blown out, go to bed and get some rest.  Tomorrow, replace the plug and seal it with green loctite (wicking formula).  If it's not blown out, seal it with green loctite anyway, then put a big gob of RTV on top of it such as would contact the bottom of the intake and create a rubber reinforcement once cured.  This is what we did for Max's 333 that he put in his RX-7. He was beside himself when we finally found this core plug blown out.

88 sport rebuild , need advice

Reply #155 –
http://forums.corral.net/forums/5-0-5-8-engine-tech/843239-302-block-oil-gallery-plug-questions.html

and THIS

http://www.loctiteproducts.com/p/t_lkr_green/overview/Loctite-Threadlocker-Green-290.htm

88 sport rebuild , need advice

Reply #156 –
that freeze plug is present, its new, now if it is in too deep i dont know, need another explorer motor to compare to.
will check those links tomorrow foe

thanks guys,,

88 sport rebuild , need advice

Reply #157 –
That is the one FOE he has to remove it and spin the pump. I am leaning twords the main bearing slot that feeds it. If there is no oil there there is no other reason i can think of> When cleaning a block after machining i always shoot water through all the oil passages to make sure they are clear. Having a blocked oil passage is not something i would think is the issue. Basically the short block has to be torn down and started from FRESH. Good Luck Jay.
I spend money I don't have, To build  cars I don't need, To impress people I don't know

HAVE YOU DRIVEN A FORD LATELY!!

88 sport rebuild , need advice

Reply #158 –
here is an oil flow layout 5.0L

if the top side freeze plug you point out is a probable fault being installed too deep, then i would still have oil flow to the passanger lifter galley anyway.

I measured the installed depth of my son's old 5.0L and the new explorer 5.0L
old motor installed depth of this freeze plug is .310''
new motor installed depth of this freeze plug is .290''

88 sport rebuild , need advice

Reply #159 –
here is where i need to start i believe,,
and you all know what that means by way of tear down

88 sport rebuild , need advice

Reply #160 –
I know you have a great attention to detail Scott, but would it be possible to have installed the main bearings upside down?'

88 sport rebuild , need advice

Reply #161 –
Quote from: 87thunderbirdBlackJack;420348
I know you have a great attention to detail Scott, but would it be possible to have installed the main bearings upside down?'
That wouldn't deny oil to the cam and lifters, it would only deny oil to the crank.  The oil passage from one galley to the other at the crank is in the block, so if the bearing was upside down oil would still move on the the next galley.

88 sport rebuild , need advice

Reply #162 –
Quote from: 87thunderbirdBlackJack;420348
I know you have a great attention to detail Scott, but would it be possible to have installed the main bearings upside down?'


i was just thinking that then corrected myself because of the design of the oil galley above number1 main.

should have oil flow restriction issue solved later on today.

Your cam buffed out really nice by the way.

88 sport rebuild , need advice

Reply #163 –
Sweet glad to hear.
Hope you get this issue figured out so you both can enjoy it

88 sport rebuild , need advice

Reply #164 –
I am betting on the upper main bearings, If memory serves me they are slotted and the slotted one goes in the block. Normally the bearing TANGS are OFFSET on the uppers and centered in the lowers so reversal is not something easily dun. But i do not remember if the 302 is like that. I know chevies are. One thing to remember when ever doing an engine!!!! Or for that matter anything always take lots of photos and keep the old parts to compare to the new ones. This can save a lot of grief when monday morning QUARTERBACKING. Good luck Jay
I spend money I don't have, To build  cars I don't need, To impress people I don't know

HAVE YOU DRIVEN A FORD LATELY!!