420a first engine rebuild

[ryan95eclipse]

Got tired of searching and searching. This will be my first engine rebuild. Trying not to spend over 800 if my rods and pistons are re-usable. they are said to be je/eagle with only 5k on them. Car engine is over heating. Cant figure out why. changed both pumps. rod bearings. blah blah blah. no fix. good compression. no leaks. PITA!!! 420a. I plan on getting the block hot tanked. Not sure if im gonna hone or have it decked unless it needs to be and is cheap. the hot tank is 45 bucks. rods n pistons checked is free. As for the build i plan to buy a new stock crank and a felpro gasket kit. Im not sure how to tell if my engine is from the car or not. the car is a 95 but i have reason to believe the engine is a 96. how can i be sure when i strip it down? Im gonna either get oem head bolts since i have a budget. or arp if i can find em cheap an new. ###### clevite main and rod bearings and new rings.. is there anything else i should be looking for? this is gonna be my first rebuild. ive watched the videos. did a lot of reading and the engines are pretty simple. i can go up to 1200 max right now. take note that i plan on going turbo after winter or before if i can.


any input?


also, any chance an e3 plug can cause a 420a to over heat?

 

[dalesmitsu]

Nice price for hot tank whats the shop name.

The way to tell is by the bearings. Is your motor tore down.

Watch this video he notched his 1995 420a block for bearings(this means he used a different year bearings)
YouTube - turbo 420a build


Also, make you buy the correct bearings for year of car. PartsDinosaur, Phoenix, Arizona, wholesale engine parts and kits is a great place to buy them

 

[ryan95eclipse]

Ok so for the 95 block it wont have those notches he cut into the block?
The shop i believe was call Ricks speedway in south amherst ohio. Ill verify next post i got it all written down. also the website you listed the main and rod bearings is has on their, are those just as good as the clevite bearings? i dont want to put bearings in that are gonna burn up. after turbo i want to run 12-15 psi daily on either a 14b or 16g turbo for starters.

Another question is do i lube/oil the cylinder walls when i re-ring and put my pistons back in?

my engine is still waiting to be pulled. i have all but 4 sensors and the heater core hose unhooked. and the axles still need pulled once i roll it out of my garage. I plan on pulling both the engine and tranny through the top.

 

[horizontalkev]

Mind pulling mine out afterwards?

 

[ryan95eclipse]

sure thing. is actually been fun and easy

No replies isnt helping any I need to no if I lube the cylinder walls when installing pistons? and if i lube the block when installing main/thrust bearings? how well do OEM head bolts hold up under boost? If theres a link i missed that answers these please direct me to them. im trying to be extra cautious before my rebuild which is being delayed. :/

what would be a decent set of bearings to use? rod and main/thrust? that are good up to 400hp per say?

 

[derrickeclipse]

sure thing. is actually been fun and easy

No replies isnt helping any I need to no if I lube the cylinder walls when installing pistons? and if i lube the block when installing main/thrust bearings? how well do OEM head bolts hold up under boost? If theres a link i missed that answers these please direct me to them. im trying to be extra cautious before my rebuild which is being delayed. :/

what would be a decent set of bearings to use? rod and main/thrust? that are good up to 400hp per say?

yes u need to lube cylinder walls, actually need to lube everything. any place where friction is. period. they have oil made just for that. just like cam lube for new cams. i would recommend arp head bolts if you are planning on boosting it. also you need to buy the highest grade head gasket you can find if you plan on boosting at later date. DO NOT buy the cheap felpro, not even the one from the dealership. they are not made for turbos. they will blow alot.

 

[ryan95eclipse]

ok. so if i think i have enough lube, lube some more? and what head gasket will work? a cometic hg? i not pushing for anything big. maybe 400hp max until a later fresh build comes in and until i can do the head.

 

[2GbTalonGuy]

Yes Make sure everything is lubed inside that engine. And I believe some companies make head gaskets especially for boosting the 420A. Cleavite bearings should be fine.

I honestly dont know why you are tearing down the whole block for an overheating issue. Replacing the HG would be the farthest you would have to go for an overheating issue. The problem behind that most likely lies elsewhere.

 

[ryan95eclipse]

Honestly its cause im fed up with it. Me my father, my papa and a few other people have looked at the car and tried fixes and nothing. It doesnt leak, smoke at all, has good compresson and says no oil psi. sometimes once it fires up i hear a slight knock and then it goes away after a second. sometimes i dont. i dont think its the headgasket cause of those reasons. i think it has to be a worn out crank. the mechanic said the oil could be slipping past the bearings or something wierd like that. but i found a set of cp pistons over bore of .20 and eagle rods brand new with a hahn stage 2 turbo mani and 20g turbo for 600 bucks so im buying them monday and going from there most likely.