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Oil leaking out of head after rebuild??

 
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Old 02-10-2014, 12:30 AM
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Oil leaking out of head after rebuild??

So I had my motor rebuilt by a shop, resleeved, type s pistons, stock rods, crower cams. They only assembled the short block, I put on the head. I have read about re torquing ARP head studs after a few heat cycles, but heres my problem: I have put about 60 miles on the engine and I can see oil leaking out between the head and the block. I checked for leaks every hour or so and I saw none until now. Is this normal? And can I fix it by just re torquing the nuts, or do I have to pull the head off and replace the gasket? Oil pressure and water temp are normal...
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Old 02-10-2014, 10:44 PM
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Re: Oil leaking out of head after rebuild??

You positive it's coming from the head/block area? Made sure there were no weird kinks in the head gasket before installation (and a new head gasket, right)? How much oil is leaking?

I've never heard the 're-torque' thing from ARP. Did you do the 30-60-90ft/lb in the proper sequence, and double check the 90lb on all studs? Keep in mind OEM bolts are torqued to something like 73ft/lbs so if it was done right, you've got a lot more pressure keeping your **** together and shouldn't have any leaks.
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Old 02-10-2014, 10:49 PM
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Re: Oil leaking out of head after rebuild??

Come to think of it, where would oil leak out through the HG??
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Old 02-10-2014, 11:18 PM
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Re: Oil leaking out of head after rebuild??

I agree with linso, the only thing that can leak out of a headgasket is coolant and compression
Is it an oem head gasket or one of those "one fits all"?
After i rebuilt my engine I had a mess of oil leaking everywhere
Check everything again, cam seals, rear seal, etc, wipe as much oil away as you can. Drive for like 10 minutes and look to see if you can spot were its coming from. and closely watch your oil on your dipstick
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Old 02-10-2014, 11:27 PM
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Re: Oil leaking out of head after rebuild??

^^Yup, after my first couple start ups from the rebuild, up high I had a leaking intake cam seal, and down low a leaking oil cooler O-ring, and oil pressure sensor.
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Old 02-10-2014, 11:46 PM
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Re: Oil leaking out of head after rebuild??

It can be leaking from the oil galleries. But it's very unlikely since it's not pressurized and the oil just drains back to the pan through them. Did you make sure you installed the head gasket right side up? Also did you check the block/head for any warping and follow the loosing/tightening sequence for the head bolts?
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Old 02-11-2014, 12:03 AM
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Re: Oil leaking out of head after rebuild??

Block and head are both freshly resurfaced. I followed the 30-60-90 sequence and double checked everything. I used a felpro gasket, no creases or kinks in the gasket. Its leaking from the back right corner (by where the brake master cylinder is), but I'll have to check it again in the morning, the lude is parked for the night.
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Old 02-11-2014, 12:09 AM
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Re: Oil leaking out of head after rebuild??

30-60-90 sequence? Could you please clarify?

Cam seals and valve cover seals are all new?

And as already stated, oil flows down from the head to the block through the oil drain back ports.
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Old 02-11-2014, 12:15 AM
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Re: Oil leaking out of head after rebuild??

I torqued the studs to 30 ft lbs, then 60, then 90. And yes, all seals are brand new.
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Old 02-11-2014, 12:20 AM
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Re: Oil leaking out of head after rebuild??

Oh yeah, I forgot that you're using ARP head studs.

I've used OEM head bolts and ARP headstuds; torqued to stock specs on the OEM bolts and only 5 ft*lbs more on the ARP studs and haven't had any problems. I didn't try torquing to the recommended ARP spec because it's so friggin tight (plus my block was honed with a torque plate with OEM bolts at OEM spec).

Anyway, I would not think you'd have to retorque the head bolts. I never did, but that doesn't mean it's right. It couldn't hurt to try, IMO, as long as you do everything correctly. :)

I'd check to ensure that it's coming from between the head and block. It could be coming from somewhere else and pooling there because of the shelf between the block and head in that area.
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Old 02-11-2014, 12:21 AM
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Re: Oil leaking out of head after rebuild??

On the seals, did you ensure that the cam seals are perpendicular to the cams. Sometimes they can get cocked as you torque the cam caps.

Did you Hondabond the corners of the valve cover gasket?
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Old 02-11-2014, 02:27 AM
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Re: Oil leaking out of head after rebuild??

Before I ask again if you tightened the head bolts in order, do ARP head studs have to be tightened in the order?
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Old 02-11-2014, 04:18 AM
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Re: Oil leaking out of head after rebuild??

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Before I ask again if you tightened the head bolts in order, do ARP head studs have to be tightened in the order?
Yeah. It's for the same reason you tighten lugs across instead of one, then the next one to it, then the next..


Anyway, I bet it's slowing leaking out of a cam seal and like 71dsp said, pooling at a corner. I bet if you clean everything off and watch those seals for a few minutes of idling at different speeds, you'll see some oil barely start creeping out.
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Old 02-11-2014, 12:40 PM
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Re: Oil leaking out of head after rebuild??

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You positive it's coming from the head/block area? Made sure there were no weird kinks in the head gasket before installation (and a new head gasket, right)? How much oil is leaking?

I've never heard the 're-torque' thing from ARP. Did you do the 30-60-90ft/lb in the proper sequence, and double check the 90lb on all studs? Keep in mind OEM bolts are torqued to something like 73ft/lbs so if it was done right, you've got a lot more pressure keeping your **** together and shouldn't have any leaks.


It IS possible to over-tighten bolts which flattens the gasket, not making a correct seal. Think about over-tightening oil pan bolts (at least with 4th gen rubber gaskets)
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Old 02-11-2014, 05:35 PM
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Re: Oil leaking out of head after rebuild??

I dont think I overtorqued it though...Ill keep an eye on it over the next few days and keep yall updated.
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Old 02-12-2014, 12:26 AM
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Re: Oil leaking out of head after rebuild??

clean the head and block area of concern then throw baby power around the cam seals. I bet its the cam seals. If you install them too far into the head, they wont seal properly. If the back spring on the seal falls off, it wont seal properly...etc
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