Sickened

Newbies, and basic Stroker Recipes... Get started with your first stroker here!!
Post Reply
Bubby
Posts: 3
Joined: November 11th, 2021, 5:56 am
Stroker Displacement: 4.6
Vehicle Year: 2000
Vehicle Make: Jeep
Vehicle Model: Wj

Sickened

Post by Bubby »

Fresh built 4.6. 20 minute breakin with in 40 minutes the oil pressure dropped to 11 psi. At idle.The stroker kit was bought from a well respected jeepstroker man. Engine built by a well established race engine builder. The crank that was sent was so undersized that different size rod bearings needed to be used and still ended up with a .0022/.0023 clearance. The mains that were sent was used but was left with a .0027/.0028 clearance. Melling 81 oil pump.
I broke it in with 10w30 as reccomended. The builder gave me some brad pen 10w40 but losses pressure at hot idle still. I really believe im losing pressure from the bearings. Were else?
I didnt have an oil pressure drop b4 the build. 6k is alot of money for large clearances and oil pressure drops.
Thanks
TR1Hemi
Making Progress
Making Progress
Posts: 84
Joined: August 23rd, 2012, 3:33 am
Vehicle Year: 1997
Vehicle Make: Jeep
Vehicle Model: Cherokee

Re: Sickened

Post by TR1Hemi »

What do cam bearings #2 and #3 look like?
User avatar
Cheromaniac
I live here
I live here
Posts: 3012
Joined: March 8th, 2008, 12:58 pm
Stroker Displacement: 4563cc
Vehicle Year: 1992
Vehicle Make: Jeep
Vehicle Model: Cherokee
Location: Cyprus
Contact:

Re: Sickened

Post by Cheromaniac »

Your bearing clearances are excessive and you already know that so there are two possible solutions. One is to have the existing crank reground to the maximum rod & main bearing undersize available (0.030") and use matching bearings that provide the correct clearances. The other is to get a new crank.
1992 XJ 4.6 I6 - 5MT - Stroker build-up, Stroker "recipes" Sold
1995 Mustang GT - 4AT - Modded Sold
2006 Mustang GT - 5MT - Modded Current ride
Bubby
Posts: 3
Joined: November 11th, 2021, 5:56 am
Stroker Displacement: 4.6
Vehicle Year: 2000
Vehicle Make: Jeep
Vehicle Model: Wj

Re: Sickened

Post by Bubby »

Thanks for the reply fellas
I pulled the motor and gave it to the shop. Iv notbeen there to loook but was told thatevrything lookwd fine with the exception of the crank thrust washer. It appears that the converter is pushuing against the crank and wearing on the washer. Not sure what would cause that.
As far as the clearance i believe it is excessive as well. The builder offered the same solution and that i would be waiting, possibly months to get it back.
I dont know how to reply to you individually
Post Reply

Who is online

Users browsing this forum: Semrush [Bot] and 0 guests