Cylinder head questions.

Reply Subscribe

Thread Tools

Search this Thread

Nov 10, 2024 | 01:52 AM

LouKramm86

Thread Starter

Instructor

Joined: Jun 2024

Posts: 104

Likes: 15

From: Sacramento, CA

Cylinder head questions.

Currently rebuilding my 89s L98. Have a bit of pitting in the head right where the cylinder ring on the head gasket would sit. If it cant be machined out (it may be about 1/16th in deep) (can get my fingernail stuck on it) I will have to get new heads. Anyone have any recommendations? (in Cali have to smog and not trying to build a race car) was looking on summit and there's a few reasonably priced. What should I look for? Also is the 89 L98 a roller engine or flat tappet?

Nov 10, 2024 | 08:07 AM

FostersPerformance

Safety Car

Joined: Jul 2003

Posts: 3,500

Likes: 879

From: Saratoga Springs NY

2024 C4 of the Year Finalist - Modified

2022 C4 of the Year Finalist - Modified

89 is a roller engine.

Bring the heads to a good machinist. Let them make the decision.

Nov 11, 2024 | 02:32 AM

LouKramm86

Thread Starter

Instructor

Joined: Jun 2024

Posts: 104

Likes: 15

From: Sacramento, CA

Quote:

Originally Posted by FostersPerformance

89 is a roller engine.

Bring the heads to a good machinist. Let them make the decision.

I will be taking the heads to motor machine in Sacramento ca either tomorrow or Tuesday depending on if he's open on veterans day

Nov 11, 2024 | 09:34 AM

RandomTask

Race Director

Joined: Feb 2008

Posts: 19,691

Likes: 322

From: Alexandria VA

1/16th of an in is astronomical in terms of "pitting"; that's over 0.060". I seriously doubt that it's actually that deep. Machine shop will let you know what you need to do.

Nov 12, 2024 | 02:54 AM

LouKramm86

Thread Starter

Instructor

Joined: Jun 2024

Posts: 104

Likes: 15

From: Sacramento, CA

Quote:

Originally Posted by RandomTask

1/16th of an in is astronomical in terms of "pitting"; that's over 0.060". I seriously doubt that it's actually that deep. Machine shop will let you know what you need to do.

They got dropped off at motor machine this morning haven't heard anything bad yet. He is cleaning. Pressure testing and machining for just under 400$ for the pair.