Blown 5.7 need help as what to do.
#12
Join Date: Jul 2007
Location: South Georgia/East Florida
Posts: 24,686
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Yep, only blown Hemi's I've seen to date either showed signs of overheating/head issues or destroyed cylinders showing obvious pre-detonation from running 87 octane fuel over long periods.
We post about how important it is to either run 89+ or re-tune the vehicle to safely run 87 octane - which draws the "haters" out in droves.
To the OP, have the block checked - even badly scored walls can be sleeved. It's not overly difficult to completely rebuild the engine and complete rebuild kits containing EVERYTHING needed are available for under $1000. If you want to price out some full rebuild kits PM me, I have a couple of sources I can give you.
I had to completely rebuild the 4.7 HO last year in my Grand Cherokee and even with having to pay for both heads to be rebuilt I came out around $2000. Rebuilding your pushrod V8 is a walk in the park compared to the OHC 4.7...
We post about how important it is to either run 89+ or re-tune the vehicle to safely run 87 octane - which draws the "haters" out in droves.
To the OP, have the block checked - even badly scored walls can be sleeved. It's not overly difficult to completely rebuild the engine and complete rebuild kits containing EVERYTHING needed are available for under $1000. If you want to price out some full rebuild kits PM me, I have a couple of sources I can give you.
I had to completely rebuild the 4.7 HO last year in my Grand Cherokee and even with having to pay for both heads to be rebuilt I came out around $2000. Rebuilding your pushrod V8 is a walk in the park compared to the OHC 4.7...
Last edited by HammerZ71; 09-07-2013 at 10:30 AM.
#13
Which is crazy when you think it is on average 10 cents more for 89 versus 87. Even if you are dead on E or past it, most trucks have a 26 gal tank so thats $2.60 per tank? Thats nothing
#14
Hammerz71 I shot ya a pm. I am going to do this myself and hoping to get the truck back home this week. Now just to find tips and tricks to pulling it and the the rebuild/replacement can start. looks like it is research time. any advice on power adders or upgrades I should make during this time would be great.
Shawn
Shawn
#16
I am just finishing up on my 5.7 rebuild, they aren't to hard to rebuild just get a good manual(for tq specs and info). porting & polish the heads is good power increase, but better know what your doing. watch a couple horsepower tv episodes and you get a better understanding. definetly a cam swap with springs and pushrods will help drematicly. The new gasket seal and ring kit with melling oil pump only costed $600 from flatlander racing.com shipped to CAN. everything fit perfect. So they are pretty cheap to rebuild if you have the resources and equipment.