How does this L98 look
Thread Starter
Burning Brakes
Joined: Mar 2002
Posts: 1,035
Likes: 0
From: Atlanta Ga
Well, I am considering the 1.6 RR's stil on the fence!
I do run Prestone, I'm removing all coolant lines even those on the oil filter cooler, want all 20 year old hoses gone, so I will get all the old coolant out. I can go with what ever I want then?
I think I've decided to not pull the heads, it's not going to see high RPM just cruising around town.
I just took all the intake/runners/plenum/valve covers up to a car wash and used the engine cleaning setting. Holy crap looked like Simple Green meets Prestone meets Solylent Green!!!!! Ran them through a couple cycles then with high pressure water and they cleaned up good. Now I've got to get them preped for painting.
I do run Prestone, I'm removing all coolant lines even those on the oil filter cooler, want all 20 year old hoses gone, so I will get all the old coolant out. I can go with what ever I want then?
I think I've decided to not pull the heads, it's not going to see high RPM just cruising around town.
I just took all the intake/runners/plenum/valve covers up to a car wash and used the engine cleaning setting. Holy crap looked like Simple Green meets Prestone meets Solylent Green!!!!! Ran them through a couple cycles then with high pressure water and they cleaned up good. Now I've got to get them preped for painting.
Race Director
Joined: Aug 2000
Posts: 14,130
Likes: 7
Cruise-In II Veteran
Good to hear you were able to clean them yourself.I took my parts to the car wash using the high pressure wash hose and it didnt get all the grime out of it,even with cleaning chemicals.I had better results with the machine shop hot tanks.I guess my parts were filthier than yours.
This was quite a few years ago though...dont have the Vette anymore,but I take my other car parts to the shop when I need them hot tanked and steamed.I can never get them looking that new.
This was quite a few years ago though...dont have the Vette anymore,but I take my other car parts to the shop when I need them hot tanked and steamed.I can never get them looking that new.
Safety Car
Joined: Apr 2001
Posts: 3,525
Likes: 2
From: Houston TX
Thread Starter
Burning Brakes
Joined: Mar 2002
Posts: 1,035
Likes: 0
From: Atlanta Ga
I agree the hot tanking would be a good idea, but I'm looking at this as I just cleaned these things with the car wash and probably got 90-95% of the gunk, that is WAY ahead of where I was!
The one thing I think I'll do to clean more of the engine area,like around the heads and timing cover is to use a garden sprayer with water/simple green, but I'll get close to boiling water in it to really try to cut through the remain exterior gunk.
I now need to turn to all the coolant lines and get those all off, even the ones on the oil cooler as that is how this entire thing got started, I want all new hoses everywhere, no 20yr old hoses for me.
The one thing I think I'll do to clean more of the engine area,like around the heads and timing cover is to use a garden sprayer with water/simple green, but I'll get close to boiling water in it to really try to cut through the remain exterior gunk.
I now need to turn to all the coolant lines and get those all off, even the ones on the oil cooler as that is how this entire thing got started, I want all new hoses everywhere, no 20yr old hoses for me.
Melting Slicks
Joined: Jul 2005
Posts: 2,586
Likes: 2
From: Bardstown Kentucky
I just had a TPI apart to this same level. I was swapping injectors on it. While I had it apart I did a small port job on the runners and intake. There are a lot of BIG casting flaws in these intakes. Also a good time to replace the EGR if you are keeping all the emissions equip. intact.
Just make sure to not get water in the ports while cleaning. Some of that painters tape that doesnt leave residue works good for this kind of thing.
Good luck!
Just make sure to not get water in the ports while cleaning. Some of that painters tape that doesnt leave residue works good for this kind of thing.
Good luck!
Melting Slicks
Joined: Jul 2005
Posts: 2,586
Likes: 2
From: Bardstown Kentucky
I have some video footage, however stupid that sounds, of porting the plenum and runners if you pm me your email.
The egr is the big contraption in the center of the intake under the plenum. It has a vacuum hose running to it and is kind of a golden color.
The egr is the big contraption in the center of the intake under the plenum. It has a vacuum hose running to it and is kind of a golden color.
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Thread Starter
Burning Brakes
Joined: Mar 2002
Posts: 1,035
Likes: 0
From: Atlanta Ga
I thought that was the EGR, I did clean out that port area at the car wash with the high pressure so I think it will breath much better. Given that I've always passed emission with flying colors I would guess the EGR is working OK.
I'll have to gauge if $40 on a no speed/power change is worth it. I'm a fan of preventive maintenacne but I've been doing a lot in that area with this project.
I'll have to gauge if $40 on a no speed/power change is worth it. I'm a fan of preventive maintenacne but I've been doing a lot in that area with this project.
Melting Slicks
Joined: Nov 2005
Posts: 2,736
Likes: 0
From: WAY UPSTATE NY
Looking at your pics the rust on the pushrods and the lifter spider concerns me. Maybe just an intake gasket leak into the lifter valley. Hard to tell by the pics.
Is the car normaly brought up to proper operating temp long enough to burn off condensation in the oil? What temp t-stat were you running?
Is the car normaly brought up to proper operating temp long enough to burn off condensation in the oil? What temp t-stat were you running?
Thread Starter
Burning Brakes
Joined: Mar 2002
Posts: 1,035
Likes: 0
From: Atlanta Ga
nutz4c4: The car gets mixed use sometimes a run to the office that get well into operating temp drive in ATL traffic, other days it is just a short 8-10 miles run where it probably just get to temp.
The stat was factory or last intake job at GM around 1994. I just picked up a new 180 stat for the assembly.
What is the lifter spider?
The stat was factory or last intake job at GM around 1994. I just picked up a new 180 stat for the assembly.
What is the lifter spider?
Melting Slicks
Joined: Nov 2005
Posts: 2,736
Likes: 0
From: WAY UPSTATE NY
nutz4c4: The car gets mixed use sometimes a run to the office that get well into operating temp drive in ATL traffic, other days it is just a short 8-10 miles run where it probably just get to temp.
The stat was factory or last intake job at GM around 1994. I just picked up a new 180 stat for the assembly.
What is the lifter spider?
The stat was factory or last intake job at GM around 1994. I just picked up a new 180 stat for the assembly.
What is the lifter spider?
Thread Starter
Burning Brakes
Joined: Mar 2002
Posts: 1,035
Likes: 0
From: Atlanta Ga
I also wonder why the moisture. I started this job due to periodic low coolant light without a sure place where I was seeing coolant, At a GM shop day through my NCCC club a GM tech noted that the intake needed the gaskets replaced and figured it was involved with the whole thing.
If I installed roller rockers, which I'm debating, I could pull the push rods and clean them up, or maybe just replace as that won't break the bank, maybe $50 or so.
Damn, once you open it up it is a slippery slope of doing more, more, more.
If I installed roller rockers, which I'm debating, I could pull the push rods and clean them up, or maybe just replace as that won't break the bank, maybe $50 or so.
Damn, once you open it up it is a slippery slope of doing more, more, more.
Thread Starter
Burning Brakes
Joined: Mar 2002
Posts: 1,035
Likes: 0
From: Atlanta Ga
Very interesting about the port, not sure which is 7 off the top of my head, but I can tell you that when I did the Ohm test on the injectors I had one that read 3 while all others were at 16.5, so I did have one having an issue for sure. I have the Ohm reading written down at home so I can't remember which one that was either.
Which photo did you see the white area?
Which photo did you see the white area?
Safety Car
Joined: Oct 2008
Posts: 4,689
Likes: 4
From: Yucaipa CA
Very interesting about the port, not sure which is 7 off the top of my head, but I can tell you that when I did the Ohm test on the injectors I had one that read 3 while all others were at 16.5, so I did have one having an issue for sure. I have the Ohm reading written down at home so I can't remember which one that was either.
Which photo did you see the white area?
Which photo did you see the white area?
Safety Car
Joined: Oct 2008
Posts: 4,689
Likes: 4
From: Yucaipa CA
I thought that was the EGR, I did clean out that port area at the car wash with the high pressure so I think it will breath much better. Given that I've always passed emission with flying colors I would guess the EGR is working OK.
I'll have to gauge if $40 on a no speed/power change is worth it. I'm a fan of preventive maintenacne but I've been doing a lot in that area with this project.
I'll have to gauge if $40 on a no speed/power change is worth it. I'm a fan of preventive maintenacne but I've been doing a lot in that area with this project.
Plus it looks alot nicer with the clean delete plates.