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4.0 OHV Performance Build - An extremely capable daily!


malohnes

Active Member
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August 8, 2009
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City, State
SE Alaska
Year, Model & Trim Level
'91 xl m5 4x4
Anymore progress on this project?

I'm very close to getting this kit, minus the 422 cam and am looking for feedback on issues and solutions. I don't have the machine shops locally sourced so I have to farm out the work and that eats up my budget really fast. Knowing some of this ahead of time means less down time for me.

I'm mostly concerned with reliability issues and fitment quality.

If things go well, come rebuild time, 2 years down the road, I'm very likely going turbo, Morana stroker kit and custom engine computer.
 


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Naasau

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Denver Colorado
Year, Model & Trim Level
'93 Explorer XLT
Bump.

Guys? Did your engines explode and kill you both?
 








jd4242

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va beach
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92explorer&94 ranger
Bump.

Guys? Did your engines explode and kill you both?
lol... <<crickets>>
Im still around..i finally got my parts back and just assembling my motor. .ive been talking with Tom..he has redesigned the plate a couple times as well as the hardware, he also has come out with a top girdle for them to keep them from breaking..for over $1,500 for his kit now,id highly advise against getting his roller rockers..
 




Dono

347 V8 Limited turbo
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00 Limited V8
ive been talking with Tom..he has redesigned the plate a couple times as well as the hardware, he also has come out with a top girdle for them to keep them from breaking..
Is he going to send you the updated parts for free? It sure sounds like his design was never reliable in the first place.
 




jd4242

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92explorer&94 ranger
Is he going to send you the updated parts for free? It sure sounds like his design was never reliable in the first place.
We are still emailing back and forth. .but yea i think he released it a little early
 




Naasau

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City, State
Denver Colorado
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'93 Explorer XLT
Damn. That's Savage.

I'm looking at a rebuild/full reconditioned engine since I flipped my X a few weeks back, and I've been scouring this tread as well as a few others for ideas.

I'm sorry you're having issues with your engine.
 




jd4242

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92explorer&94 ranger
Damn. That's Savage.

I'm looking at a rebuild/full reconditioned engine since I flipped my X a few weeks back, and I've been scouring this tread as well as a few others for ideas.

I'm sorry you're having issues with your engine.
This is only issue, rest of motor is done..the top girdle is very large and requires modification to valve covers..it also may use longer studs,different/longer poly locks..i dont know if i have room for all that under my supercharger plate..
 




jd4242

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Is he going to send you the updated parts for free? It sure sounds like his design was never reliable in the first place.
He has responded that he does have a updated plate and hardware and would replace mine if i pay shipping both ways..so im going to send them back..he hasn't responded to what is needed for the top girdle yet,ive asked in every email
 




Dono

347 V8 Limited turbo
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Looking at the pain I've been thru, I'd definitely error on the side of caution.
I think your making a wise choice.
 




Craig H Durkee

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City, State
WI
Year, Model & Trim Level
1997 Lincoln Mark VIII
Im very interested in the roller rockers..ive been talking to Tom for years about them,i have yet found anyone to drop that kind of cash..fyi comp cams 988 dual springs wouldve worked.

If looking for real performance call Manley and get a set of custom 1.8 and 1.5 valves for it.they will run you $480ish but biggest performance gain you can get.those valves are extremely small..your need new hardened exhaust valve seats and custom bronze guides. .

SI makes stock stainless one piece valves in stock sizes..i wouldnt run the stock two piece valves,they have been know to break in half with the added spring pressure. Any SS valve will need custom bronze guides tho,the stock cast guides will wear and stick to the SS valve...TRUST ME

Also throw a Mellings M328hv oil pump in,helps a ton to get oil up top
JD4242... The 1.8 intake along with the 1.5 exhaust valves will physically fit but only have about 0.030" clearance between them! It would take just a little bit of guide wear and the valves will be in contact with each other. How do you propose this is a good upgrade?
 








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